ICS951402AGLF [IDT]

Processor Specific Clock Generator, 210MHz, PDSO48, 6.10 MM, 0.50 MM PITCH, GREEN, MO-153, TSSOP-48;
ICS951402AGLF
型号: ICS951402AGLF
厂家: INTEGRATED DEVICE TECHNOLOGY    INTEGRATED DEVICE TECHNOLOGY
描述:

Processor Specific Clock Generator, 210MHz, PDSO48, 6.10 MM, 0.50 MM PITCH, GREEN, MO-153, TSSOP-48

时钟 光电二极管 外围集成电路 晶体
文件: 总23页 (文件大小:285K)
中文:  中文翻译
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Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Programmable Timing Control Hub™ for P4™ processor  
Recommended Application:  
ATI chipset, P4 system, Banias system  
Output Features:  
Pin Configuration  
VDDREF 1  
48 VDDSDR  
47 SDRAM_OUT  
46 GNDSDR  
45 CPU_STOP#*  
44 CPUCLKT1  
43 CPUCLKC1  
42 VDDCPU  
41 GNDCPU  
40 CPUCLKT0  
39 CPUCLKC0  
38 IREF  
FS0/REF0 2  
FS1/REF1 3  
FS2/REF2 4  
GNDREF 5  
2 - Pairs of differential CPUCLKs (differential current mode)  
1 - SDRAM @ 3.3V  
8 - PCI @3.3V (selectable 33/66 MHz) (2 free-running)  
X1 6  
X2 7  
GND 8  
VDD 9  
2 - AGP @ 3.3V  
2- 48MHz, @3.3V fixed.  
1- 24/48MHz, @3.3V selectable by I2C  
(Default is 24MHz)  
*VttPWR_GD/PD# 10  
PCI66/33#_SEL 11  
PCI_STOP#* 12  
VDDPCI 13  
37 GND  
36 AVDD  
FS3/PCICLK_F0 14  
FS4/PCICLK_F1 15  
PCICLK0 16  
PCICLK1 17  
GNDPCI 18  
35 SCLK  
34 SDATA  
3- REF @3.3V, 14.318MHz.  
33 GNDAGP  
32 AGPCLK0  
31 AGPCLK1  
30 VDDAGP  
29 AVDD48  
28 48MHz_0  
27 48MHz_1  
26 24_48MHz/SEL24_48#MHz**  
Features/Benefits:  
Support for Intel Banias power management features  
Programmable output frequency, divider ratios, output rise/  
falltime, output skew.  
Programmable spread percentage for EMI control.  
Watchdog timer technology to reset system  
if system malfunctions.  
VDDPCI 19  
PCICLK2 20  
PCICLK3 21  
PCICLK4 22  
PCICLK5 23  
GNDPCI 24  
GND48  
25  
Programmable watch dog safe frequency.  
48-Pin TSSOP & SSOP  
Support I2C Index read/write and block read/write  
operations.  
* These inputs have a 120K pull up to VDD.  
** These inputs have a 120K pull down to GND.  
Supports spread spectrum for EMI reduction; default is  
spread spectrum ON.  
Block Diagram  
Skew Requirements  
PCI-PCI  
< 350ps  
< 350ps  
< 500ps  
PLL2  
48MHz (0:1)  
24_48MHz  
AGP-AGP  
CPU-AGP  
CPU-PCI  
/ 2  
< 500ps  
< 1ns  
X1  
X2  
XTAL  
OSC  
REF (2:0)  
3
AGP-PCI  
AGP leading  
CPU-SDRAM  
PLL1  
Spread  
Spectrum  
CPU  
DIVDER  
CPUCLKT (1:0)  
CPUCLKC (1:0)  
< 1ns  
Stop  
2
2
SDRAM  
SDRAM_OUT  
SDATA  
SCLK  
FS (4:0)  
1
6
Control  
Logic  
Power Groups  
VDDCPU = CPU  
VDDPCI = PCICLK_F, PCICLK  
VDDSD = SDRAM  
PCI  
DIVDER  
Stop  
PCICLK (5:0)  
PCICLK_F (1:0)  
AGP (1:0)  
PD#  
PCI_STOP#  
CPU_STOP#  
PD#/Vtt_PWRGD  
PCI66/33#SEL  
24_48SEL#  
2
2
Config.  
Reg.  
AGP  
DIVDER  
AVDD48 = 48MHz, 24MHz, fixed PLL  
AVDD = Analog Core PLL  
VDDAGP= AGP  
VDDREF = Xtal, REF  
I REF  
0660—05/05/05  
ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.  
ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Pin Description  
PIN NUMBER  
PIN NAME  
TYPE  
DESCRIPTION  
1
2
3
4
5
6
7
8
9
VDDREF  
FS0/REF0  
FS1/REF1  
FS2/REF2  
GNDREF  
X1  
X2  
GND  
VDD  
PWR Ref, XTAL power supply, nominal 3.3V  
I/O  
I/O  
I/O  
Frequency select latch input pin / 14.318 MHz reference clock.  
Frequency select latch input pin / 14.318 MHz reference clock.  
Frequency select latch input pin / 14.318 MHz reference clock.  
PWR Ground pin for the REF outputs.  
IN Crystal input, Nominally 14.318MHz.  
OUT Crystal output, Nominally 14.318MHz  
PWR Ground pin.  
PWR Power supply, nominal 3.3V  
This 3.3V LVTTL input is a level sensitive strobe used to determine  
when latch inputs are valid and are ready to be sampled. This is an  
active high input. / Asynchronous active low input pin used to power  
10  
*VttPWR_GD/PD#  
IN  
down the device into a low power state.  
Selects all PCI clock frequencies to be 33Mhz or 66Mhz. 0 = 33Mhz , 1  
= 66Mhz  
11  
12  
PCI66/33#_SEL  
PCI_STOP#*  
IN  
Stops all PCICLKs besides the PCICLK_F clocks at logic 0 level, when  
input low  
IN  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
VDDPCI  
FS3/PCICLK_F0  
FS4/PCICLK_F1  
PCICLK0  
PWR Power supply for PCI clocks, nominal 3.3V  
I/O  
I/O  
Frequency select latch input pin / 3.3V PCI free running clock output.  
Frequency select latch input pin / 3.3V PCI free running clock output.  
OUT PCI clock output.  
OUT PCI clock output.  
PWR Ground pin for the PCI outputs  
PWR Power supply for PCI clocks, nominal 3.3V  
OUT PCI clock output.  
OUT PCI clock output.  
OUT PCI clock output.  
OUT PCI clock output.  
PWR Ground pin for the PCI outputs  
PWR Ground pin for the 48MHz outputs  
PCICLK1  
GNDPCI  
VDDPCI  
PCICLK2  
PCICLK3  
PCICLK4  
PCICLK5  
GNDPCI  
GND48  
24/48MHz clock output / Latched select input for 24/48MHz output.  
0=48MHz, 1 = 24MHz.  
26  
24_48MHz/SEL24_48#MHz**  
I/O  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
48MHz_1  
48MHz_0  
AVDD48  
VDDAGP  
AGPCLK1  
AGPCLK0  
GNDAGP  
SDATA  
OUT 48MHz clock output.  
OUT 48MHz clock output.  
PWR Analog power for 48MHz outputs and fixed PLL core, nominal 3.3V  
PWR Power supply for AGP clocks, nominal 3.3V  
OUT AGP clock output  
OUT AGP clock output  
PWR Ground pin for the AGP outputs  
I/O  
IN  
Data pin for SMBus circuitry, 5V tolerant.  
Clock pin of SMBus circuitry, 5V tolerant.  
SCLK  
AVDD  
GND  
PWR 3.3V Analog Power pin for Core PLL  
PWR Ground pin.  
This pin establishes the reference current for the differential current-  
mode output pairs. This pin requires a fixed precision resistor tied to  
ground in order to establish the appropriate current. 475 ohms is the  
38  
IREF  
OUT  
standard value.  
Complementary clock of differential pair CPU outputs. This clock is 180  
degrees out of phase with the SDRAM clock.  
39  
40  
CPUCLKC0  
CPUCLKT0  
OUT  
True clock of differential pair CPU outputs. This clock is in phase with  
the SDRAM clock  
OUT  
41  
42  
GNDCPU  
VDDCPU  
PWR Ground pin for the CPU outputs  
PWR Supply for CPU clocks, 3.3V nominal  
Complementary clock of differential pair CPU outputs. This clock is 180  
degrees out of phase with the SDRAM clock.  
43  
44  
CPUCLKC1  
CPUCLKT1  
OUT  
True clock of differential pair CPU outputs. This clock is in phase with  
the SDRAM clock  
OUT  
45  
46  
47  
48  
CPU_STOP#*  
GNDSDR  
SDRAM_OUT  
VDDSDR  
IN  
Stops all CPUCLK besides the free running clocks  
PWR Ground pin for the SDRAM outputs.  
OUT SDRAM seed clock output for external buffer  
PWR Supply for SDRAM clocks, nominal 3.3V.  
0660—05/05/05  
2
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Table 1: Clock Power Management Truth Table  
Stoppable  
CPU  
(Not free-run)  
Non-stop  
CPU  
(Free-run)  
Byte 6  
Bit 6  
Byte 6  
Bit 7  
CPU_  
STOP  
PD#  
Note  
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
IREF x 2  
IREF x 2  
IREF x 6  
RUN  
Hi Z  
Hi Z  
Hi Z  
RUN  
Hi Z  
Hi Z  
IREFx6  
RUN  
Hi Z  
Hi Z  
HI Z  
IREF x 2  
IREF x 2  
RUN  
Non  
Tri-state  
Mode  
RUN  
IREF x 2  
IREF x 2  
RUN  
RUN  
Hi Z  
Hi Z  
RUN  
RUN  
Hi Z  
CPU_stop#  
Tri-state  
Mode  
PD# &  
Tri-state  
Mode  
PD# &  
CPU_stop#  
Tri-state  
Mode  
Hi Z  
RUN  
RUN  
RUN  
0660—05/05/05  
3
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
General I2C serial interface information for the ICS951402  
How to Write:  
Controller (host) sends a start bit.  
• Controller (host) sends the write address D2 (H)  
• ICS clock will acknowledge  
How to Read:  
• Controller (host) will send start bit.  
• Controller (host) sends the write address D2 (H)  
• ICS clock will acknowledge  
• Controller (host) sends the begining byte location = N  
• ICS clock will acknowledge  
• Controller (host) sends the begining byte  
location = N  
• Controller (host) sends the data byte count = X  
• ICS clock will acknowledge  
• Controller (host) starts sending Byte N through  
Byte N + X -1  
• ICS clock will acknowledge  
• Controller (host) will send a separate start bit.  
• Controller (host) sends the read address D3 (H)  
• ICS clock will acknowledge  
(see Note 2)  
• ICS clock will send the data byte count = X  
• ICS clock sends Byte N + X -1  
• ICS clock sends Byte 0 through byte X (if X(H)  
was written to byte 8).  
• ICS clock will acknowledge each byte one at a time  
• Controller (host) sends a Stop bit  
• Controller (host) will need to acknowledge each  
byte  
• Controllor (host) will send a not acknowledge bit  
• Controller (host) will send a stop bit  
Index Block Read Operation  
Index Block Write Operation  
Controller (Host)  
ICS (Slave/Receiver)  
Controller (Host)  
ICS (Slave/Receiver)  
T
starT bit  
starT bit  
T
Slave Address D2(H)  
Slave Address D2(H)  
WR  
WRite  
WR  
WRite  
ACK  
ACK  
ACK  
ACK  
ACK  
ACK  
Beginning Byte = N  
Beginning Byte = N  
Data Byte Count = X  
Beginning Byte N  
RT  
Repeat starT  
Slave Address D3(H)  
RD  
ReaD  
ACK  
Data Byte Count = X  
Beginning Byte N  
ACK  
ACK  
Byte N + X - 1  
ACK  
P
stoP bit  
Byte N + X - 1  
N
P
Not acknowledge  
stoP bit  
*See notes on the following page.  
0660—05/05/05  
4
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Serial Configuration Command Bitmap  
SDRAM  
MHz  
USB/DOT  
CPU MHz  
3V66 MHz  
PCI MHz  
REF MHz  
With Spread Enabled…  
MHz  
FS4 FS3 FS2 FS1 FS0  
0
0
0
0
0
66.67  
33.33  
14.318  
48.008  
100.00  
133.34  
200.01  
166.65  
100.00  
133.34  
133.16  
166.45  
105.00  
140.00  
66.67  
175.00  
109.99  
146.65  
210.00  
183.27  
100.00  
133.34  
200.01  
166.65  
133.34  
100.00  
166.45  
133.16  
105.00  
140.00  
66.67  
175.00  
109.99  
146.65  
210.00  
183.27  
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
66.67  
66.67  
66.66  
66.67  
66.67  
66.58  
66.58  
70.00  
70.00  
66.67  
70.00  
73.33  
73.33  
70.00  
73.31  
66.34  
66.34  
66.34  
66.34  
66.34  
66.34  
66.29  
66.29  
66.26  
66.26  
66.26  
66.25  
66.26  
66.26  
66.18  
66.18  
33.33  
33.33  
33.33  
33.33  
33.33  
33.29  
33.29  
35.00  
35.00  
33.33  
35.00  
36.66  
36.66  
35.00  
36.65  
33.17  
33.17  
33.17  
33.17  
33.17  
33.17  
33.15  
33.15  
33.13  
33.13  
33.13  
33.13  
33.13  
33.13  
33.09  
33.09  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
14.318  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
48.008  
SpreaD OFF  
OR  
Center spread +/-0.3%  
99.51  
132.68  
199.02  
165.85  
99.51  
132.68  
132.59  
165.73  
99.51  
132.68  
199.02  
165.85  
132.68  
99.51  
Down Spread -0.6%  
165.73  
132.59  
99.39  
132.51  
198.77  
165.64  
99.39  
132.51  
132.36  
165.45  
99.39  
132.51  
198.77  
165.64  
132.51  
99.39  
Down Spread -0.8%  
165.45  
132.36  
0660—05/05/05  
5
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Reserved Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 0  
-
-
-
-
-
-
-
-
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
I2C Table: Reserved Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 1  
-
-
-
-
-
-
-
-
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
I2C Table: Reserved Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 2  
-
-
-
-
-
-
-
-
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
0660—05/05/05  
6
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Reserved Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 3  
-
-
-
-
-
-
-
-
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
1
1
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
I2C Table: Functionality and Frequency Select Register  
Control  
Function  
Name  
Type  
0
1
PWD  
Pin #  
Byte 4  
FS3  
FS2  
FS1  
FS0  
RW  
RW  
RW  
RW  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
-
Freq Select Bit 7  
Freq Select Bit 6  
Freq Select Bit 5  
Freq Select Bit 4  
0
0
0
0
See  
Frequency Table  
-
-
-
Frequency H/W or  
IIC Select  
-
FS Source  
RW Latch Input  
IIC  
0
Bit 3  
Freq Select Bit 2  
SPREAD Enable  
Output Control  
RW  
RW  
RW  
Bit 2  
Bit 1  
Bit 0  
-
-
-
FS4  
SS_EN  
All Outputs  
See Frequency Table  
0
1
0
OFF  
ON  
Normal  
Tri-state  
Note: If Byte4 bit1 = 0 then FS4=0  
I2C Table: Output Control and Read Back Register  
Control  
Function  
Pin #  
Name  
Type  
0
1
PWD  
Byte 5  
31  
32  
26  
-
-
-
AGP1  
AGP0  
Output Control  
Output Control  
24 or 48 Select  
FS4 Read back  
FS3 Read back  
FS2 Read back  
FS1 Read back  
FS0 Read back  
RW  
RW  
RW  
R
R
R
Disable  
Disable  
48MHz  
Enable  
Enable  
24MHz  
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
24_48#SEL  
FS4RB  
FS3RB  
FS2RB  
FS1RB  
FS0RB  
X
X
X
X
X
X
-
-
-
-
-
-
-
-
-
-
-
-
R
R
0660—05/05/05  
7
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Output Control Register  
Control  
Function  
Pin #  
Name  
Type  
0
1
PWD  
Byte 6  
-
-
-
-
-
-
CPU_STOP#  
PD#  
CPU Stop Status  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
1
1
0
0
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
See Table 1:  
Truth Table on page 3  
PD# Status  
PCI_F0  
PCI_F1  
CPUT/C_0  
CPUT/C_1  
CPUT/C_0  
CPUT/C_1  
Free-run Control  
Free-run Control  
Free-run Control  
Free-run Control  
Output Control  
Output Control  
Free  
Free  
Free  
Free  
Disable  
Disable  
Not free  
Not free  
Not free  
Not free  
Enable  
Enable  
40,39  
44,43  
I2C Table: Output Control Register  
Control  
Function  
Pin #  
Name  
Type  
0
1
PWD  
Byte 7  
15  
PCICLK_F1  
PCICLK_F0  
PCICLK5  
PCICLK4  
PCICLK3  
PCICLK2  
PCICLK1  
PCICLK0  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
Disable  
Disable  
Disable  
Disable  
Disable  
Disable  
Disable  
Disable  
Enable  
Enable  
Enable  
Enable  
Enable  
Enable  
Enable  
Enable  
1
1
1
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
14  
23  
22  
21  
20  
17  
16  
I2C Table: Byte Count Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 8  
-
BC7  
BC6  
BC5  
BC4  
BC3  
BC2  
BC1  
BC0  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
-
-
-
-
-
-
-
Writing to this  
register will configure  
how many bytes will  
be read back, default  
is 0F= 15 bytes.  
0660—05/05/05  
8
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Watchdog Timer Register  
PWD  
Pin #  
Name  
Control Function Type  
0
1
Byte 9  
-
WD7  
WD6  
WD5  
WD4  
WD3  
WD2  
WD1  
WD0  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
1
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
These bits represent  
RW  
-
-
-
-
-
-
-
X*293ms the  
RW  
watchdog timer will  
RW  
wait before it goes to  
alarm mode. Default  
is 16 X 293ms =4.688  
RW  
RW  
RW  
seconds  
RW  
I2C Table: WD Timer Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 10  
Latched  
Inputs  
IIC Prog.  
B (11:17)  
M/N Programming  
Enable  
-
M/NEN  
RW  
0
Bit 7  
Watchdog Enable  
WD Status Control  
-
-
WDEN  
RW  
RW  
Disable  
Enable  
ON  
0
0
Bit 6  
Bit 5  
WDStatus  
OFF  
-
-
-
-
-
WD SF4  
WD SF3  
WD SF2  
WD SF1  
WD SF0  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
1
0
0
0
0
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Writing to these bit will  
configure the safe  
frequency as Byte 0 Bit  
(6:0)  
Note: If Byte4 bit1 = 0 then FS4=0  
I2C Table: VCO Frequency Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 11  
-
-
-
-
-
-
-
-
N Div8  
M Div6  
M Div5  
M Div4  
M Div3  
M Div2  
M Div1  
M Div0  
N Divider Bit 8  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
X
X
X
X
X
X
X
X
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
The decimal  
representation of M  
Div (6:0) is equal to  
reference divider  
value. Default at  
power up = latch-in  
or Byte 0 Rom table.  
0660—05/05/05  
9
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: VCO Frequency Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 12  
-
N Div7  
N Div6  
N Div5  
N Div4  
N Div3  
N Div2  
N Div1  
N Div0  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
X
X
X
X
X
X
X
X
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
The decimal  
-
-
-
-
-
-
-
representation of N  
Div (8:0) is equal to  
VCO divider value.  
Default at power up  
= latch-in or Byte 0  
Rom table.  
I2C Table: Spread Spectrum Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 13  
-
-
-
-
-
-
-
-
SSP7  
SSP6  
SSP5  
SSP4  
SSP3  
SSP2  
SSP1  
SSP0  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
X
X
X
X
X
X
X
X
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
These Spread  
Spectrum bits will  
program the spread  
percentage. It is  
recommended to use  
ICS Spread % table  
for spread  
programming.  
I2C Table: Spread Spectrum Control Register  
Control  
PWD  
Pin #  
Name  
Type  
0
1
Byte 14  
Function  
Reserved  
Reserved  
Reserved  
-
-
-
-
-
-
-
-
Reserved  
Reserved  
Reserved  
SSP12  
SSP11  
SSP10  
SSP9  
R
R
R
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
X
X
X
X
X
X
X
X
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
It is recommended  
to use ICS Spread  
% table for spread  
programming.  
SSP8  
0660—05/05/05  
10  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Output Divider Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 15  
-
-
-
-
-
-
-
-
SD Div3  
SD Div2  
SD Div1  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
X
X
X
X
X
X
X
X
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
SDRAM divider ratio  
can be configured  
via these 4 bits  
individually.  
See Table 2: Divider  
Ratio Combination  
Table  
SD Div0  
CPU Div3  
CPU Div2  
CPU Div1  
CPU Div0  
CPU divider ratio can  
be configured via  
these 4 bits  
See Table 2: Divider  
Ratio Combination  
Table  
individually.  
Table 2: CPU, SDRAM, AGP and PCI66 Divider Ratio Combination Table  
Divider (3:2)  
Bit  
00  
01  
10  
11  
MSB  
8
16  
24  
40  
56  
1
2
3
5
7
2
4
6
10  
14  
Div  
4
8
12  
20  
28  
Div  
0000  
0001  
0010  
0011  
0100  
0101  
0110  
0111  
1000  
1001  
1010  
1011  
1100  
1101  
1110  
1111  
00  
01  
10  
11  
Address  
Div  
Address  
Address  
Address  
Div  
LSB  
Table 3: PCI33 Divider Ratio Combination Table  
Divider (3:2)  
Bit  
00  
01  
10  
11  
MSB  
8
32  
24  
40  
56  
Div  
1
4
3
5
7
2
8
6
10  
14  
Div  
4
0000  
0001  
0010  
0011  
0100  
0101  
0110  
0111  
1000  
1001  
1010  
1011  
1100  
1101  
1110  
1111  
00  
01  
10  
11  
16  
12  
20  
28  
Div  
Address  
Div  
Address  
Address  
Address  
LSB  
0660—05/05/05  
11  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Output Divider Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 16  
-
-
-
-
-
-
-
-
AGP Div3  
AGP Div2  
AGP Div1  
AGP Div0  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
X
X
X
X
X
X
X
X
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
AGP divider ratio can  
be configured via  
these 4 bits  
See Table 2: Divider  
Ratio Combination  
Table  
individually  
Reserved  
Reserved  
Reserved  
Reserved  
-
-
-
-
-
-
-
-
I2C Table: Output Divider Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 17  
AGP Phase Invert  
-
-
AGPINV  
Reserved  
RW  
RW  
Default  
-
Inverse  
-
X
X
Bit 7  
Bit 6  
Reserved  
SDRAM  
Phase Invert  
-
SDINV  
RW  
Default  
Default  
Inverse  
Inverse  
X
Bit 5  
CPU Phase Invert  
-
-
-
-
-
CPUINV  
PCIDiv3  
PCIDiv3  
PCIDiv3  
PCIDiv3  
RW  
RW  
RW  
RW  
RW  
X
X
X
X
X
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
PCI divider ratio can  
be configured via  
these 4 bits  
See Table 2 & 3:  
Divider Ratio  
Combination Table  
individually  
I2C Table: Group Skew Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 18  
-
-
-
-
-
-
-
-
CPUSkw3  
CPUSkw2  
SDSkw3  
CPUT  
Skew Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
See 2-bit Skew  
Control at table 4  
1
0
0
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
SDRAM  
Skew Control  
See 2-bit Skew  
Control at table 4  
SDSkw2  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
-
-
-
-
-
-
-
-
0660—05/05/05  
12  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Table 4:Skew Specification on Output Mode  
Bit3  
Bit2  
Bit1  
Bit0  
Skew in ps  
0
0
1
1
0
1
0
1
X
X
X
X
X
X
X
X
500  
750  
1000  
1250  
I2C Table: Group Skew Control Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 19  
-
Reserved  
Reserved  
Reserved  
Reserved  
AGPSkw3  
AGPSkw2  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
-
-
-
-
-
-
-
AGP  
Skew Control  
See 2-bit Skew  
Control at table 4  
Reserved  
Reserved  
-
-
-
-
I2C Table: Group Skew Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 20  
-
-
-
-
-
-
-
-
PCISkw3  
PCISkw2  
Reserved  
Reserved  
PCISkw1  
PCISkw0  
Reserved  
Reserved  
PCI_F [1:0]  
Skew Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
See 2-bit Skew  
Control at table 4  
0
0
0
0
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Reserved  
Reserved  
PCI [5:0]  
-
-
-
-
See 2-bit Skew  
Control at table 4  
Skew Control  
Reserved  
Reserved  
-
-
-
-
0660—05/05/05  
13  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Slew Rate Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 21  
-
-
-
-
-
-
-
-
24_48Slw1  
24_48Slw0  
AGPSlw1  
AGPSlw0  
Reserved  
Reserved  
REFSlw1  
REFSlw0  
24_48 Slew Rate  
Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
AGP Slew Rate  
Control  
Reserved  
Reserved  
REF Slew  
Rate Control  
I2C Table: Slew Rate Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 22  
-
-
-
-
-
-
-
-
SDSlw1  
SDSlw0  
SDRAM Slew Rate  
Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Reserved  
Reserved  
PCISlw1  
PCISlw0  
PCISlw1  
PCISlw0  
Reserved  
Reserved  
PCI_F Slew Rate  
Control  
PCI Slew Rate  
Control  
I2C Table: Output Control Register  
Control  
Function  
PWD  
Pin #  
Name  
Type  
0
1
Byte 23  
-
27  
47  
28  
26  
4
Reserved  
48MHz_1  
SDRAM  
48MHz_0  
24_48MHz  
REF2  
Reserved  
-
-
-
X
1
1
1
1
1
1
1
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
Output Control  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
Disable  
Disable  
Disable  
Disable  
Disable  
Disable  
Disable  
Enable  
Enable  
Enable  
Enable  
Enable  
Enable  
Enable  
3
2
REF1  
REF0  
0660—05/05/05  
14  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
I2C Table: Reserved Control Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 24  
-
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
-
-
-
-
-
-
-
I2C Table: Reserved Control Register  
Control  
Function  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Pin #  
Name  
Type  
0
1
PWD  
Byte 25  
-
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
RW  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
-
-
-
-
-
-
-
0660—05/05/05  
15  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Absolute Maximum Ratings  
Core Supply Voltage . . . . . . . . . . . . . . . . . . . . . . 4.6 V  
I/O Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . 3.6V  
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0.5 V to VDD +0.5 V  
Ambient Operating Temperature . . . . . . . . . . . . 0°C to +70°C  
Storage Temperature . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C  
Case Temperature . . . . . . . . . . . . . . . . . . . . . . . . 115°C  
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are  
stress specifications only and functional operation of the device at these or any other conditions above those listed in the  
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended  
periods may affect product reliability.  
Electrical Characteristics - Input/Supply/Common Output Parameters  
TA = 0 - 70C; Supply Voltage VDD = 3.3 V +/-5%  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
2
TYP MAX  
VDD  
UNITS  
V
Input High Voltage  
VIH  
+0.3  
VSS  
0.3  
-5  
-
Input Low Voltage  
Input High Current  
VIL  
IIH  
0.8  
5
V
VIN = VDD  
VIN = 0 V; Inputs with no pull-up  
resistors  
mA  
mA  
IIL1  
-5  
Input Low Current  
VIN = 0 V; Inputs with pull-up  
resistors  
IIL2  
-200  
CL = Full load; Select @ 100  
Operating Supply Current  
IDD3.3OP  
229  
220  
230  
233  
360  
mA  
mA  
MHz  
CL =Full load; Select @ 133  
IDD3.3OP  
IDD3.3PD  
Fi  
360  
45  
MHz  
IREF=5 mA  
Powerdown Current  
Input Frequency  
Pin Inductance  
38.1  
mA  
MHz  
nH  
VDD = 3.3 V  
14.32  
Lpin  
7
5
CIN  
Logic Inputs  
pF  
Input Capacitance1  
Clk Stabilization1,2  
COUT  
CINX  
Output pin capacitance  
6
pF  
X1 & X2 pins  
From PowerUp or deassertion of  
PowerDown to 1st clock.  
27  
36  
1
45  
pF  
TSTAB  
1.8  
10  
10  
ms  
ns  
t
t
PZH,tPZL  
Output enable delay (all outputs)  
1
1
Delay1  
PHZ,tPLZ  
Output disable delay (all outputs)  
ns  
1Guaranteed by design, not 100% tested in production.  
2See timing diagrams for buffered and un-buffered timing requirements.  
0660—05/05/05  
16  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Electrical Characteristics - CPU (0.7V Select)  
TA = 0 - 70C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)  
PARAMETER  
Current Source Output  
Impedance  
SYMBOL  
Zo1  
CONDITIONS  
MIN  
3000  
2.4  
TYP MAX  
UNITS  
VO = Vx  
Output High Voltage  
VOH3  
IOH = -1 mA  
V
Output Low Voltage  
Voltage High  
Voltage Low  
Max Voltage  
Min Voltage  
Crossing Voltage (abs)  
VOL3  
VHigh  
VLow  
Vovs  
Vuds  
IOL = 1 mA  
0.4  
850  
150  
Statistical measurement on  
single ended signal using  
Measurement on single ended  
signal using absolute value.  
660  
-150  
710  
0
mV  
1150  
mV  
mV  
mV  
-450  
250  
Vcross(abs)  
550  
140  
Variation of crossing over all  
edges  
Crossing Voltage (var)  
d-Vcross  
Rise Time  
Fall Time  
tr  
VOL = 0.175V, VOH = 0.525V  
175  
175  
240  
242  
700  
700  
125  
125  
ps  
ps  
ps  
ps  
tf  
VOH = 0.525V VOL = 0.175V  
Rise Time Variation  
Fall Time Variation  
d-tr  
d-tf  
Measurement from differential  
wavefrom  
Duty Cycle  
dt3  
45  
51  
55  
%
Skew  
tsk3  
VT = 50%  
50  
76  
100  
150  
ps  
ps  
1
Jitter, Cycle to cycle  
tjcyc-cyc  
VT = 50%  
1Guaranteed by design, not 100% tested in production.  
2 IOWT can be varied and is selectable thru the MULTSEL pin.  
Electrical Characteristics - AGP  
TA = 0 - 70C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified)  
PARAMETER  
Output Frequency  
Output Impedance  
Output High Voltage  
Output Low Voltage  
SYMBOL  
FO1  
CONDITIONS  
MIN  
TYP MAX  
66.66  
UNITS  
MHz  
W
1
VO = VDD*(0.5)  
IOH = -1 mA  
12  
33  
55  
RDSP1  
1
2.4  
V
VOH  
1
IOL = 1 mA  
0.55  
-33  
V
VOL  
V OH@MIN = 1.0 V, V  
=
=
OH@MAX  
1
Output High Current  
Output Low Current  
-33  
30  
mA  
mA  
IOH  
3.135 V  
VOL @MIN = 1.95 V, VOL @MAX  
0.4 V  
1
38  
IOL  
1
Rise Time  
Fall Time  
Duty Cycle  
Skew  
VOL = 0.4 V, VOH = 2.4 V  
0.5  
0.5  
45  
1.38  
1.45  
54.4  
243  
2
ns  
ns  
%
tr1  
1
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
2
tf1  
1
dt1  
55  
250  
250  
1
tsk1  
VT = 1.5 V  
ps  
ps  
1
Jitter  
tjcyc-cyc  
VT = 1.5 V 3V66  
139  
1Guaranteed by design, not 100% tested in production.  
0660—05/05/05  
17  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Electrical Characteristics - VCH, 48MHz DOT, 48MHz, USB  
TA = 0 - 70C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)  
PARAMETER  
Output Frequency  
Output Impedance  
Output High Voltage  
Output Low Voltage  
SYMBOL  
FO1  
CONDITIONS  
MIN  
TYP MAX  
48  
UNITS  
MHz  
W
1
VO = VDD*(0.5)  
IOH = -1 mA  
IOL = 1 mA  
20  
48  
60  
RDSP1  
1
2.4  
V
VOH  
1
0.4  
-23  
V
VOL  
V OH@MIN = 1.0 V, V OH@MAX  
3.135 V  
VOL @MIN = 1.95 V, VOL @MAX  
0.4 V  
=
=
1
Output High Current  
Output Low Current  
-29  
29  
mA  
mA  
IOH  
1
27  
IOL  
1
48DOT Rise Time  
48DOT Fall Time  
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
0.5  
0.5  
1
0.6  
0.8  
1
1
ns  
ns  
ns  
ns  
%
tr1  
1
tf1  
1
VCH 48 USB Rise Time  
VCH 48 USB Fall Time  
48 DOT Duty Cycle  
VCH 48 USB Duty Cycle  
48 DOT Jitter  
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
1.2  
2
tr1  
1
1
1.3  
2
tf1  
1
dt1  
45  
45  
52.8  
53.5  
183  
0.43  
223  
55  
55  
350  
1
1
dt1  
VT = 1.5 V  
%
1
VT = 1.5 V  
ps  
ns  
ps  
tjcyc-cyc  
1
USB to DOT Skew  
VT = 1.5 V (0 OR 180 degrees)  
tsk1  
1
VCH Jitter  
tjcyc-cyc  
VT = 1.5 V  
350  
1Guaranteed by design, not 100% tested in production.  
Electrical Characteristics - SDRAM  
TA = 0 - 70C; VDD =VDDL 3.3 V +/-5%; CL = 30 pF (unless otherwise stated)  
PARAMETER  
Output Impedance  
Output Impedance  
Output High Voltage  
Output Low Voltage  
Output High Current  
Output Low Current  
Rise Time  
SYMBOL  
CONDITIONS  
VO = VDD*(0.5)  
MIN TYP MAX UNITS  
1
RDSP2A  
10  
10  
20  
20  
1
RDSN2A  
VO = VDD*(0.5)  
IOH = -28 mA  
VOH2A  
VOL2A  
IOH2A  
IOL2A  
2.4  
V
IOL = 19 mA  
0.4  
-42  
V
VOH = 2.0 V  
mA  
mA  
ns  
ns  
%
VOL = 0.8 V  
33  
0.5  
0.5  
45  
1
tr2A  
VOL = 0.4 V, VOH = 2.4 V  
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
2.0  
2
1
Fall Time  
tf2A  
1
Duty Cycle  
Jitter1  
dt2A  
55  
tcyc-cyc  
VT = 1.5 V  
250.0  
ps  
1Guaranteed by design, not 100% tested in production.  
0660—05/05/05  
18  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Electrical Characteristics - REF  
TA = 0 - 70C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)  
PARAMETER  
Output Frequency  
Output Impedance  
Output High Voltage  
Output Low Voltage  
SYMBOL  
FO1  
CONDITIONS  
MIN  
TYP MAX  
UNITS  
MHz  
W
1
VO = VDD*(0.5)  
IOH = -1 mA  
20  
48  
60  
RDSP1  
1
2.4  
V
VOH  
1
IOL = 1 mA  
0.4  
-23  
V
VOL  
V OH@MIN = 1.0 V, V  
=
=
OH@MAX  
1
Output High Current  
Output Low Current  
-29  
29  
mA  
mA  
IOH  
3.135 V  
VOL @MIN = 1.95 V, VOL @MAX  
0.4 V  
1
27  
IOL  
1
Rise Time  
Fall Time  
Duty Cycle  
Jitter  
VOL = 0.4 V, VOH = 2.4 V  
1
1
1.25  
1.15  
53  
2
2
ns  
ns  
%
tr1  
1
VOH = 2.4 V, VOL = 0.4 V  
VT = 1.5 V  
tf1  
1
dt1  
45  
55  
1
tjcyc-cyc  
VT = 1.5 V  
1000  
ps  
1Guaranteed by design, not 100% tested in production.  
0660—05/05/05  
19  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
Shared Pin Operation -  
Input/Output Pins  
Figure 1 shows a means of implementing this function  
when a switch or 2 pin header is used. With no jumper is  
installed the pin will be pulled high. With the jumper in  
place the pin will be pulled low. If programmability is not  
necessary, than only a single resistor is necessary. The  
programming resistors should be located close to the series  
termination resistor to minimize the current loop area. It is  
more important to locate the series termination resistor  
close to the driver than the programming resistor.  
The I/O pins designated by (input/output) serve as dual  
signal functions to the device. During initial power-up, they  
act as input pins. The logic level (voltage) that is present on  
these pins at this time is read and stored into a 5-bit internal  
data latch. At the end of Power-On reset, (see AC  
characteristics for timing values), the device changes the  
mode of operations for these pins to an output function. In  
this mode the pins produce the specified buffered clocks to  
external loads.  
To program (load) the internal configuration register for  
these pins, a resistor is connected to either the VDD (logic 1)  
power supply or the GND (logic 0) voltage potential. A 10  
Kilohm (10K) resistor is used to provide both the solid CMOS  
programming voltage needed during the power-up  
programming period and to provide an insignificant load on  
the output clock during the subsequent operating period.  
Via to  
VDD  
Programming  
Header  
2K W  
Via to Gnd  
Device  
Pad  
8.2K W  
Clock trace to load  
Series Term. Res.  
Fig. 1  
0660—05/05/05  
20  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
PCI_STOP# - Assertion (transition from logic "1" to logic "0")  
The impact of asserting the PCI_STOP# signal will be the following. All PCI and stoppable PCI_F clocks will latch low in their  
next high to low transition. The PCI_STOP# setup time tsu is 10 ns, for transitions to be recognized by the next rising edge.  
Assertion of PCI_STOP# Waveforms  
PCI_STOP#  
PCI_F 33MHz  
PCI 33MHz  
tsu  
CPU_STOP# - Assertion (transition from logic "1" to logic "0")  
The impact of asserting the CPU_STOP# pin is all CPU outputs that are set in the I2C configuration to be stoppable via  
assertion of CPU_STOP# are to be stopped after their next transition following the two CPU clock edge sampling as shown.  
The final state of the stopped CPU signals is CPUT=High and CPUC=Low.There is to be no change to the output drive current  
values. The CPUT will be driven high with a current value equal to (MULTSEL0) X (I REF), the CPUC signal will not be driven.  
Assertion of CPU_STOP# Waveforms  
CPU_STOP#  
CPUT  
CPUC  
0660—05/05/05  
21  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
6.10 mm. Body, 0.50 mm. Pitch TSSOP  
c
N
(240 mil)  
(20 mil)  
In Millimeters  
In Inches  
SYMBOL COMMON DIMENSIONS COMMON DIMENSIONS  
L
MIN  
--  
0.05  
0.80  
0.17  
0.09  
MAX  
1.20  
0.15  
1.05  
0.27  
0.20  
MIN  
--  
.002  
.032  
.007  
.0035  
MAX  
.047  
.006  
.041  
.011  
.008  
A
A1  
A2  
b
E1  
E
INDEX  
AREA  
c
D
E
SEE VARIATIONS  
8.10 BASIC  
SEE VARIATIONS  
0.319 BASIC  
1
2
E1  
e
6.00  
6.20  
.236  
.244  
a
0.50 BASIC  
0.020 BASIC  
D
L
0.45  
0.75  
.018  
.030  
N
SEE VARIATIONS  
SEE VARIATIONS  
a
aaa  
0°  
--  
8°  
0.10  
0°  
--  
8°  
.004  
A
A2  
VARIATIONS  
A1  
D mm.  
D (inch)  
N
- C -  
MIN  
12.40  
MAX  
12.60  
MIN  
.488  
MAX  
.496  
48  
e
SEATING  
PLANE  
Reference Doc.: JEDEC Publication 95, MO-153  
b
10-0039  
aaa  
C
Ordering Information  
ICS951402yGLF-T  
Example:  
ICS XXXX y G LF- T  
Designation for tape and reel packaging  
Annealed Lead Free (Optional)  
Package Type  
G = TSSOP  
Revision Designator (will not correlate with datasheet revision)  
Device Type  
Prefix  
ICS = Standard Device  
0660—05/05/05  
22  
Integrated  
Circuit  
Systems, Inc.  
ICS951402  
Advance Information  
300 mil SSOP  
c
N
In Millimeters  
In Inches  
SYMBOL  
COMMON DIMENSIONS  
COMMON DIMENSIONS  
L
MIN  
2.41  
0.20  
0.20  
0.13  
MAX  
2.80  
0.40  
0.34  
0.25  
MIN  
.095  
MAX  
.110  
A
A1  
b
.008  
.008  
.005  
.016  
.0135  
.010  
E1  
E
INDEX  
AREA  
c
D
E
E1  
e
SEE VARIATIONS  
SEE VARIATIONS  
10.03  
7.40  
10.68  
7.60  
.395  
.291  
.420  
.299  
1
2
0.635 BASIC  
0.025 BASIC  
h
L
0.38  
0.50  
0.64  
1.02  
.015  
.020  
.025  
.040  
α
h x 45°  
D
N
a
SEE VARIATIONS  
SEE VARIATIONS  
0°  
8°  
0°  
8°  
VARIATIONS  
A
D mm.  
D (inch)  
N
MIN  
MAX  
MIN  
MAX  
.630  
A1  
48  
15.75  
16.00  
.620  
- C -  
Reference Doc.: JEDEC Publication 95, MO-118  
10-0034  
e
SEATING  
PLANE  
b
.10 (.004) C  
Ordering Information  
ICS951402yFLF-T  
Example:  
ICS XXXX y F LF- T  
Designation for tape and reel packaging  
Annealed Lead Free (Optional)  
Package Type  
F = SSOP  
Revision Designator (will not correlate with datasheet revision)  
Device Type  
Prefix  
ICS = Standard Device  
0660—05/05/05  
23  

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