参数资料
型号: MC68EN302CPV20BT
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144
封装: 20 X 20 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASITC, LQFP-144
文件页数: 36/128页
文件大小: 641K
代理商: MC68EN302CPV20BT
Introduction
1-2
MC68EN302 REFERENCE MANUAL
MOTOROLA
— AMUX signal provided for external bus master use
— Parity generation/checking on a per byte basis
Fully IEEE 1149.1 JTAG Compliant
144 TQFP package
1.2 BLOCK DIAGRAM
The MC68EN302 adds functionality to the pre-existing MC68302 by providing additional
blocks external to the MC68302 which arbitrate for use of the 68000 bus for access to off-
chip resources such as memory or other peripheral devices. This modular approach is
shown in Figure .
Figure 1-1. MC68EN302 Block Diagram
1.3 MEMORY MAP
The MC68EN302 memory map does not change the MC68302 memory map, but rather
adds a new 4K module block. This is in addition to the 4K module block of the MC68302.
Because of the additional register block, there are two Base Address Registers to program
MC68000
MICROCODED
COMMUNICATIONS
CONTROLLER
(RISC)
INTERRUPT
CONTROLLER
1 GENERAL-
PURPOSE
DMA
CHANNEL
3 TIMERS
AND
ADDITIONAL
FEATURES
6 DMA
CHANNELS
1152 BYTES
DUAL-PORT
RAM
3 SERIAL
CHANNELS
OTHER
SERIAL
CHANNELS
MC68302
68000
SYSTEM BUS
PERIPHERAL
BUS
DRAM
CONTROLLER
ETHERNET
CONTROLLER
MC68EN302
JTAG
IEEE 1149.1
MODULE BUS
CONTROLLER
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