MA31751 查看數據表（PDF） - Dynex Semiconductor
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MA31751 Datasheet PDF : 17 Pages
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MA31751
MPROEN
Protect logic
Extended
Address
Address
Access
violation
Execute
protect
Lock and key
access protection
Write
protect
4
AL E RES* PPA
4
AL W RES* PPA
3 bits 8 bits
8/11-bit address
expansion
1750B
3
8
12 bits
12-bit logical
address
12
W RES
Instruction
PPAAL E RES* PPA
PPAAL W RES* PPA
Page Register
Operand
DMA
PS
DMAKN
AS
32
groups
5
Group address
PS
AS
OIN
from CPU status word
AL W RES PPA
Page Register
AL W RES* PPA
0 3 4 5 7 8 15
* These 3 bits are reserved in 1750A. In 1750B they are used as
extra PPA bits to form the MSB's of the extended address bus.
LPA 12 LSB of Address 16-bit logical
4
address
16
words
Address of
word within
4k page
Logical
Address of
4k page
Figure 3: MMU Memory Mapping Mechanism
3/17
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