MC68302CRC16C [NXP]
68K INTGR COM PROC, DMA;
| 型号： | MC68302CRC16C |
| 厂家： | 
NXP |
| 描述： | 68K INTGR COM PROC, DMA 时钟 局域网 数据传输 外围集成电路 |
| 文件： | 总6页 (文件大小：289K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Freescale Semiconductor, Inc.
MC68QH302/D
(Motorola Order Number)
11/97
REV 0
MC68QH302
Advance Information
MC68QH302 Quad HDLC Integrated
Multiprotocol Processor
Technical Summary
The MC68QH302, quad HDLC integrated multiprotocol processor, is based on the three-
SCC MC68302 family of chips with the addition of the QH protocol and two extra serial
DMA channels. The QH302 supports a total of four independent communications
channels, handling two HDLC or transparent channels on SCC1; see Figure 1 for a block
diagram.
In non-QH mode, the QH302 can be used in standard 302 applications as well.
To locate any published errata or updates for this document, refer to the website at
http://www.mot.com/netcomm.
This document contains information on a new product under development. Freescale Semiconductor, Inc. reserves the right to
change or discontinue this product without notice.
© 1997. All rights reserved.
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General-Purpose
DMA
3 Timers
4 Chip Selects
Parallel I/O
RAM
+
ROM
Interrupt
Controllers
Channel
68000
System Bus
M68000
Core
20 Address Lines
8/16 Data Lines
1152 Bytes
Dual-Ported
RAM
8 DMA
Channels
Peripheral Bus
RISC
Controller
SCC2
+
SCC3
SCP
+
2 SMCs
SCC1
(2 Channels)
MC68QH302
Figure 1. MC68QH302 Block Diagram
The MC68QH302 supports a full ISDN basic rate interface with one serial channel left over to communicate
with the DTE as shown in Figure 2. The dual-channel SCC1 is used to support the two B channels.
IDL
or
GCI
2B + D
Flash +
RAM +
EEPROM
MC68QH302
X-FRMR
and
Line I/F
145572
U-INTF
or
145574
S/T INTF
SCC1*
SCC3
SCC2
MC145407
RS232-C
Note: *SCC1 = Dual channel SCC, each channel used for a B channel
Figure 2. MC68QH302 Supporting a Full ISDN Basic Rate Interface
MC68QH302 Technical Summary
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Freescale Semiconductor, Inc.
1.1 FEATURES
The main features of the MC68QH302 are as follows (new features indicated in bold):
•
•
MC68000/MC68008 microprocessor core (may be disabled to use the IMP as a peripheral)
Serial interface block including:
— Independent direct memory access (IDMA) controller
— Interrupt controller with two modes of operation
— Parallel I/O ports, some with interrupt capability
— On-chip 1152 bytes of dual-ported RAM
— Three timers, including a software watchdog timer
— Four programmable chip-select lines with wait-state logic
— Programmable address mapping of dual-ported RAM and IMP registers
— On-chip clock generator with an output clock signal
— System control
– System control register
– Bus arbitration logic with low-interrupt latency support
– Hardware watchdog for monitoring bus activity
– Low power (standby) modes
– Disable CPU logic (M68000)
– Freeze control for debugging selected on-chip peripherals
– DRAM refresh controller
•
CP including:
— Main controller (RISC processor)
— Three physical full-duplex serial communication controllers (SCCs) with the following
protocols:
– HDLC/SDLC
– UART
– Totally transparent
– V.110
— SCC1 can support two logical HDLC or transparent channels running QH protocol
— Eight serial DMA channels dedicated to the four serial channels
— Capability to send /receive up to eight buffers/frames without M68000 core intervention
— Flexible physical interface accessible by SCCs for interchip digital link (IDL), general circuit
interface (GCI, also called IOM2), pulse code modulation (PCM), and nonmultiplexed serial
interface (NMSI) operation
— Serial communication port (SCP) for synchronous communication
— Serial management controllers (SMCs) for IDL and GCI channels
Application development system available with M68302FADS.
•
MC68QH302 Technical Summary
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Freescale Semiconductor, Inc.
1.2 MC68QH302 Ordering Information
Table 1 identifies operating frequencies available for the MC68QH302.
Table 1. MC68QH302 Package/Frequency Availability
Operating
Voltage
Frequency
(MHz)
Package Type
Temperature
Order Number
144-pin thin quad flat pack
(PV suffix)
5 V
16.67
0° C to 70° C
MC68QH302PV16
MC68QH302PV20
MC68QH302PV25
20
25
The documents listed in Table 2 contain detailed information on the MC68QH302. These documents can be
obtained from the Literature Distribution Centers at the addresses listed on the back page. Visit the website
at http://www.mot.com/netcomm/ for more information.
Table 2. Documentation
Document Title
MC68302 User’s Manual
Order Number
Contents
MC68302UM/AD
M68000PM/AD
Detailed information for design
M68000 family instruction set
M68000 Family Programmer's Reference
Manual
The 68K Source
BR729/D
Independent vendor listing supporting
software and development tools
The MC68QH302 Supplement to
MC68302 User’s Manual
MC68QH302SUPL/AD
Highlights implementation-specific
features of the MC68QH302, and
discusses how they differ from the
MC68302.
MC68QH302 Technical Summary
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC68QH302 Technical Summary
For More Information On This Product,
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MC68QH302/D
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