MAX6889EVCMAXQU [MAXIM]
Proven PC Board Layout;
| 型号： | MAX6889EVCMAXQU |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Proven PC Board Layout PC |
| 文件： | 总14页 (文件大小：1801K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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Evaluate: MAX6889/MAX6892
MAX6889 Evaluation Kit/
Evaluation System
General Description
Features
● Proven PC Board Layout
The MAX6889 evaluation system (EV system) consists
of a MAX6889 evaluation kit (EV kit) and a Maxim
CMAXQUSB command module. The MAX6889/MAX6892
EEPROM-configurable, multivoltage power-supply
sequencers/supervisors monitor several voltage-detector
inputs, two auxiliary inputs, and four general-purpose
logic inputs and feature programmable outputs for highly
configurable power-supply sequencing applications. The
● Complete Evaluation System
● Convenient On-Board Test Points
● Fully Assembled and Tested
Ordering Information
PART
TEMP RANGE INTERFACE TYPE
®
evaluation software runs under Windows 98/2000/XP,
providing a handy user interface to exercise the features
of the MAX6889.
MAX6889EVKIT
0°C to +70°C
User-supplied
Windows software,
USB
MAX6889EVCMAXQU#
0°C to +70°C
Order the complete EV system (MAX6889EVCMAXQU)
for comprehensive evaluation of the MAX6889 using a
personal computer. Order the EV kit (MAX6889EVKIT) if
the command module has already been purchased with
a previous Maxim EV system or for custom use in other
microcontroller (μC)-based systems.
#Denotes ROHS compliant with exemption.
Note: The MAX6889 evaluation software is designed for use
with the complete evaluation system MAX6889EVCMAXQU
(includes CMAXQUSB module together with MAX6889EVKIT).
If the MAX6889 evaluation software will not be used, the
MAX6889EVKIT board can be purchased by itself, without the
CMAXQUSB module.
This system can also evaluate the MAX6892. Contact
factory for a free sample of MAX6892ETJ.
Component List
MAX6889 Stand-Alone EV Kit
MAX6889EVCMAXQU System
The MAX6889 EV kit provides a proven PC board layout
to facilitate evaluation of the MAX6889. It must be inter-
faced to appropriate timing signals for proper operation.
Connect 3.3V power, ground-return, and SCL/SDA inter-
face signals to the breakout header pins (see Figure 9).
The LEDs are optional circuits, which may be powered
separately or disabled altogether. Refer to the MAX6889
data sheet for timing requirements.
PART
QTY
DESCRIPTION
MAX6889 evaluation kit
Command module
MAX6889EVKIT
CMAXQUSB
1
1
MAX6889EVKIT
DESIGNATION QTY
DESCRIPTION
1μF, 6.3V X7R ceramic capacitors
(0603)
TDK C1608X7R0J105K
MAX6889 EV System
C1, C2
2
8
The MAX6889 EV system obtains power from the com-
puter’s USB port. The evaluation software runs under
Windows 98/2000/XP on an IBM PC, interfacing to the EV
system board through the computer’s USB port. See the
Quick Start section for setup and operating instructions.
0.1μF, 25V X7R ceramic
capacitors (0603)
TDK C1608X7R1E104K
C3–C10
C11, C12
H1–H4
0
4
Not installed, capacitors (0603)
8-pin headers
JU1, JU12–JU21
JU2–JU11
LED1–LED10
P1
11
10
10
1
2-pin headers
3-pin headers
LEDs, red (T1-3/4)
2 x 10 right-angle receptacle
470Ω ±5% resistors (0805)
MAX6889ETJ (32-pin thin QFN)
Shunts
Windows is a registered trademark and registered service mark
of Microsoft Corporation.
R1–R10
U1
10
1
None
17
1
None
MAX6889 EV kit PC board
19-3660; Rev 3; 3/21
Evaluate: MAX6889/MAX6892
MAX6889 Evaluation Kit/
Evaluation System
Component Suppliers
SUPPLIER
PHONE
FAX
847-390-4405
WEBSITE
TDK
847-803-6100
component.tdk.com
Note: Indicate you are using the MAX6889 when contacting this component supplier.
Quick Start
Detailed Description of Software
Required Equipment
Main Window
Before you begin, the following equipment is needed:
The evaluation software’s main window shows a block
diagram of the MAX6889, with many “clickable” features
(Figure 1). Clicking on different parts of the block diagram
leads to different feature tabs. Clicking Back returns to
the main window’s block diagram tab.
● Maxim MAX6889EVCMAXQU (contains MAX6889
EV kit board and CMAXQUSB module)
● USBA-B cable (included with CMAXQUSB module)
● Windows 98/2000/XP computer with a USB port
Configuration register changes made with the GUI are
written when the Apply button is clicked. Configuration of
the device may be re-read by clicking Refresh.
● Administrator privileges may be required when first
installing the device on Windows 2000/XP
Procedure
Press function key F1 at any time to return to the block
diagram. Press function key F2 to pop-up a window
displaying registers pertinent to the selected feature
(Figure 2). The software reads the data registers automat-
ically, unless disabled by unchecking Poll inputs every 2
seconds under the Options menu.
Do not turn on the power until all connections are made:
1) Set the CMAXQUSB’s VDD Select jumper to 3.3V.
2) Ensure that the MAX6889 EV kit’s JU1 is in 1-2
position, JU2–JU5 are open, JU6–JU10 are in 2-3
position, JU11–JU21 are in 1-2 position, and JU22 is
intact. See Jumper Function Tables section.
At startup, the evaluation software reads the device
configuration from the device registers.
3) Carefully connect the boards by aligning the 20-
pin header of the MAX6889 EV kit with the 20-pin
connector of the CMAXQUSB module. Gently press
them together. The two boards should be flush against
one another.
Voltage Monitor Tab
The Voltage Monitor tab configures voltage monitor
thresholds (Figure 3).
High-impedance mode requires installing external
resistor-dividers. A prototype area is provided on the EV
kit for this purpose.
4) Install the evaluation software on your computer
by running the INSTALL.EXE program on the disk.
The program files are copied and icons are created
for them in the Windows Start Menu.
Digital Inputs Tab
Digital inputs GPI1–GPI4 can be configured for active-
high or active-low logic (Figure 4). When a GPI_ pin
is configured active-high, a logic-high level asserts the
corresponding GPI_ input.
5) Connect the USB cable between the CMAXQUSB
and the computer. The plug-and-play system
automatically launches the New Hardware Wizard to
find the device drivers on the installation disk. When
prompted for a device driver, navigate to the directory
where the software was installed (C:\MAX6889).
Outputs Tab
The PO_ signals assert when a selected combination of
other signals become asserted (Figure 5). The voltage
monitors and the watchdog timer are internal signals.
The GPI_ pins and MR are external inputs.
6) Start the MAX6889 program by opening its icon in the
Start Menu.
7) If supplies exceeding V
are applied to IN1–IN5
CC
while V
source = 0, the part will be damaged. Click
CC
on V
source control at the bottom left of block
CC
diagram (Figure 1) to toggle V
source bit.
CC
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Evaluate: MAX6889/MAX6892
MAX6889 Evaluation Kit/
Evaluation System
When a PO_ signal is asserted, several actions may
occur. The corresponding PO_ pin can be driven to a
high or low logic level. The pin driver can be configured
as open-drain or as a push-pull output.
EEPROM Tab
The EEPROM tab displays the nonvolatile EEPROM
memory of the MAX6889 (Figure 8). Pressing Refresh
reads and displays the selected EEPROM page. Individual
memory bytes can be modified by selecting the appropri-
ate grid cell and typing zero-x prefix “0x” followed by
two hexadecimal digits 0–9/A–F. If Options menu item
Confirm EEPROM write when editing is checked, a
dialog box appears to confirm each byte written in this
manner.
User EEPROM writes may optionally be locked out when
the PO_ is asserted.
The MARGIN signal allows user system testing, by
forcing the PO_ signal to hold its previously determined
state. It is expected that MARGIN will be high during
normal operation.
EEPROM values can optionally be stored into a text file
on disk for later retrieval, using the Load from File and
Save to File buttons.
Watchdog Timer Tab
The watchdog timer asserts a fault condition after a period
of time, unless the timer is periodically reset by an input
pin being toggled (Figure 6).
Detailed Description of Hardware
The MAX6889 (U1) is surrounded by breakout header pins
H1–H4. Capacitors C1 and C2 bypass the power supply.
The user power-supply inputs IN1–IN8 are bypassed by
capacitors C3–C10.
During normal operation, an enabled watchdog timer
must be serviced by toggling a GPI pin periodically.
Typically an external piece of firmware would service
the watchdog timer by toggling a GPI pin inside a loop,
and watchdog timer assertion would be configured to
drive a PO_ output pin. Any software defect that halts the
firmware then causes the watchdog timer to assert.
Connector P1 mates with the CMAXQUSB module,
which enables communication with software running
on a PC (there are SCL/SDA pullup resistors on the
module board). As a convenience, the module also
provides power to U1 through jumper JU1. This same
power supply also powers most of the EV kit LEDs
through jumper JU22.
The initial timeout period can be set to a longer value,
to allow time for software initialization. Alternatively,
the watchdog timer can be held in reset by an optional
“clear” input. Refer to the MAX6889 data sheet for more
information about watchdog timer operation.
Programmable outputs PO1–PO10 drive optional
active-low LED indicators. When the LED is on, that
indicates that the corresponding PO output is low.
Registers Tab
The Registers tab displays the volatile working registers
of the MAX6889 (Figure 7). Pressing Refresh reads and
displays all register values. Individual register bytes can
be modified by selecting the appropriate grid cell and
typing zero-x prefix “0x” followed by two hexadecimal
digits 0–9/A–F. If Options menu item Confirm REG write
when editing is checked, a dialog box appears to confirm
each byte written in this manner.
Capacitors C11 and C12 are left open when used with
the MAX6889. These component sites are provided to
support the MAX6892.
At power-up, the MAX6889 automatically loads its regis-
ters from the configuration EEPROM. To store the active
register values into the configuration EEPROM, press
Commit to EEPROM.
Register values can optionally be stored into a text file on
disk for later retrieval, using the Load from File and Save
to File buttons.
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Evaluate: MAX6889/MAX6892
MAX6889 Evaluation Kit/
Evaluation System
Evaluating the MAX6892
The functions of the following pins change as follows:
The software and the CMOD board cannot be used with
the MAX6892; the board must be operated in stand-alone
mode.
PIN MAX6889ETJ MAX6892ETJ
CONTROLLED BY
1
PO2
PO3
PO4
PO5
PO6
PO7
PO8
PO9
PO10
MARGIN
MR
PG2
PG3
PG4
PG5
PG6
PG7
PG8
RESET
WDO
MARGIN
MR
—
—
1) With power off, replace U1 with a MAX6892ETJ.
2
2) Install user-selected EIA size 0603 capacitors for
SWT and SRT at locations C11 and C12. Refer to the
Applications Information section in the MAX6892 data
sheet.
3
—
5
—
6
—
3) Configure jumpers JU4–JU11 according to Table 3,
7
—
Jumper Function Table in the MAX6892 data sheet.
8
—
4) Inputs IN2–IN8 require user-selected resistor-
dividers, which may be installed in the prototype area.
9
—
10
11
12
13
14
15
16
17
18
19
20
23
24
25
26
31
32
—
5) Apply power between V
and GND.
CC
JU2
JU3
JU4
JU5
JU6
JU7
JU8
JU9, C12
JU10, C11
JU11
—
SDA
SCL
A0
TH0
TH1
TH2
A1
TH3
GPI4
GPI3
GPI2
GPI1
IN8
TH4
SWT
SRT
ENABLE
IN8
IN7
IN7
—
IN6
IN6
—
IN5
IN5
—
N.C.
PO1
WDI
—
PG1
—
Diagnostics Window
The diagnostics window is used for factory testing
prior to shipping the evaluation kit. It is not meant for
customer use.
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Evaluate: MAX6889/MAX6892
MAX6889 Evaluation Kit/
Evaluation System
Table 1. Jumper Function Table for MAX6889
JUMPER
PIN
POSITION
FUNCTION
Open
U1 must be powered by a user-supplied external supply connected to IN1–IN5.
JU1
V
U1 input V
is powered from connector P1 power supply (the CMAXQUSB module).
CC
CC
Closed*
Ensure that CMAXQUSB’s VDD select jumper is in the 3.3V position.
1-2
Open*
2-3
MARGIN connected to DPB.
JU2
JU3
JU4
JU5
JU6
JU7
JU8
JU9
JU10
MARGIN
MR
Normal operation.
User test mode. PO outputs are held in their previously configured states.
1-2
MR connected to DPB.
Open*
2-3
Normal operation.
Manual reset.
1-2
Do not use.
SDA
SCL
A0
Open*
2-3
Normal operation.
Do not use.
1-2
Do not use.
Open*
2-3
Normal operation.
Do not use.
1-2
A0 = 1.
Open
2-3*
1-2
Do not use.
A0 = 0.
A1 = 1.
A1
Open
2-3*
1-2
Do not use.
A1 = 0.
Input GPI4 is driven high.
GPI4
GPI3
GPI2
Open
2-3*
1-2
Input GPI4 can be driven by external user circuitry.
Input GPI4 is driven low.
Input GPI3 is driven high.
Open
2-3*
1-2
Input GPI3 can be driven by external user circuitry.
Input GPI3 is driven low.
Input GPI2 is driven high.
Open
2-3*
1-2*
Open
2-3
Input GPI2 can be driven by external user circuitry.
Input GPI2 is driven low.
Input GPI1 is driven high.
JU11
JU12–JU21
JU22
GPI1
PO1–PO10
—
Input GPI1 can be driven by external user circuitry.
Input GPI1 is driven low.
Closed*
Open
Outputs PO1–PO10 drive corresponding active-low LED indicators LED1–LED10.
Corresponding PO1–PO10 output available to drive user circuitry.
Closed*
(PC board trace)
LED1–LED16 are powered from connector P1 power supply (the CMAXQUSB
module).
Open
LED1–LED16 are unused, or can be externally powered.
*Default configuration.
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MAX6889 Evaluation Kit/
Evaluation System
Table 2. Jumper JU6, JU7 (MAX6889 Only: Device Address Selection)
JU6 SHUNT POSITION JU7 SHUNT POSITION
A0
0
A1
0
DEVICE ADDRESS
1010 00x r/w
2-3*
1-2
2-3
1-2
2-3*
2-3
1-2
1-2
1
0
1010 01x r/w
0
1
1010 10x r/w
1
1
1010 11x r/w
*Default configuration.
Table 3. Jumper Function Table for MAX6892
JUMPER
PIN
POSITION
Open
Closed*
1-2
FUNCTION
U1 must be powered by a user-supplied external supply connected to IN1–IN5.
U1 input V is powered from connector P1 power supply.
JU1
V
CC
CC
MARGIN connected to DPB.
JU2
JU3
JU4
JU5
JU6
JU7
JU8
JU9
MARGIN
MR
Open*
2-3
Normal operation.
User test mode. PG outputs are held in their previously configured states.
1-2
MR connected to DPB.
Open*
2-3
Normal operation.
Manual reset.
1-2
TH0 = 1.
TH0
Open*
2-3
Do not use.
TH0 = 0.
1-2
TH1 = 1.
TH1
Open*
2-3
Do not use.
TH1 = 0.
1-2
TH2 = 1.
TH2
Open
2-3*
Do not use.
TH2 = 0.
1-2
TH3 = 1.
TH3
Open
2-3*
Do not use.
TH3 = 0.
1-2
TH4 = 1.
TH4
Open
2-3*
Do not use.
TH4 = 0.
1-2
SWT = 1 (default watchdog timeout period).
User-installed C11 determines SWT time value.
SWT = 0 (watchdog disabled).
SWT
Open
2-3*
*Default configuration.
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MAX6889 Evaluation Kit/
Evaluation System
Table 3. Jumper Function Table for MAX6892 (continued)
JUMPER
PIN
POSITION
1-2
FUNCTION
SRT = 1 (default reset timeout period).
JU10
SRT
Open
2-3*
User-installed C12 determines SRT time value.
SRT = 0 (reset asserted).
1-2*
ENABLE = 1 (force all PG outputs low).
JU11
JU12–JU21
JU22
ENABLE
PG1–PG10
—
Open
2-3
User-supplied signal overrides internal pulldown.
ENABLE = 0 (PG determined by input conditions).
Outputs PG1–PG10 drive corresponding active-low LED indicators LED1–LED10.
Corresponding PG1–PG10 output available to drive user circuitry.
Closed*
Open
Closed*
(PC board trace)
LED1–LED16 are powered from connector P1 power supply (the CMAXQUSB
module).
Open
LED1–LED16 are unused, or can be externally powered.
*Default configuration.
Figure 1. Block Diagram (Bring Up Anytime by Pressing Function Key F1)
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MAX6889 Evaluation Kit/
Evaluation System
Figure 2. Related Registers Adjunct Window (Shown by Pressing Function Key F2)
Figure 3. Voltage Monitor Tab
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MAX6889 Evaluation Kit/
Evaluation System
Figure 4. Digital Inputs Tab
Figure 5. Programmable Outputs Tab
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MAX6889 Evaluation Kit/
Evaluation System
Figure 6. Watchdog Timers Tab
Figure 7. Registers Tab
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Evaluate: MAX6889/MAX6892
MAX6889 Evaluation Kit/
Evaluation System
Figure 8. EEPROM Memory Tab
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MAX6889 Evaluation Kit/
Evaluation System
H4-6
H4-5
H4-4
H4-3
H4-2
H4-1
C10
0.1µF
C9
C8
C7
C6
0.1µF
C5
0.1µF
0.1µF 0.1µF 0.1µF
R1
470Ω
H4-7
H4-8
JU12
JU13
LED1
LED2
R2
470Ω
32
31
30
29
28
27
26
25
U1
C4
H3-8
H3-7
H3-6
0.1µF
H1-1
H1-2
1
24
PO2
PO3
IN7
R3
470Ω
C3
JU14
JU15
23
22
+3.3V
IN8
2
DBP
LED3
LED4
R4
470Ω
0.1µF
DBP
H1-3
H1-4
3
4
C2
1µF
JU1
PO4
H3-5
U1
MAX6889
21
R5
V
CC
GND
470Ω
C1
1µF
JU16
LED5
H1-5
H3-4
R6
470Ω
5
6
7
8
20
PO5
PO6
PO7
PO8
GP11
GP12
GP13
JU17
JU18
C12
OPEN
H3-3
H3-2
H1-6
H1-7
H1-8
19
18
LED6
LED7
R7
470Ω
C11
OPEN
H3-1
R8
470Ω
17
GP14
JU19
DBP
DBP
1
DBP
1
DBP
1
LED8
9
10
R9
470Ω
11
12
13
14
15
16
JU20
JU21
1
P1
3.3V
2
2
2
2
LED9
R10
470Ω
2 x 10 HEADER
H2-1 H2-2
H2-3
H2-4
DBP
H2-5
H2-6
H2-7
H2-8
DBP
JU22
JU8
JU9
JU10
JU11
P1-2 P1-1
P1-4 P1-3
P1-6 P1-5
P1-8 P1-7
P1-10 P1-9
P1-12 P1-11
P1-14 P1-13
P1-16 P1-15
P1-18 P1-17
P1-20 P1-19
3
3
3
3
DBP
LED10
1
1
1
1
2
2
2
2
JU2
JU3
JU6
JU7
3
3
3
3
GND
DBP
1
2
DBP
1
JU4
3
2
JU5
3
Figure 9. MAX6889 EV Kit Schematic
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MAX6889 Evaluation Kit/
Evaluation System
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1.0”
1.0”
Figure 10. MAX6889 EV Kit Component Placement Guide—
Component Side
Figure 11. MAX6889 EV Kit PC Board Layout—Component Side
1.0”
Figure 12. MAX6889 EV Kit PC Board Layout—Solder Side
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Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
5/05
8/05
1/21
3/21
0
1
2
3
Initial Release
—
1,2
1
Replace CMOD232 with CMAXQUSB
Updated Ordering Information
Updated Ordering Information
1
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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