14 计算机组成--寄存器文件结构
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王木木
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本篇文档主要介绍了寄存器文件结构，具体介绍了创建读取端口、创建写端口、主存、SRAM的典型大小、用4片8K x 1 bit 的 RAM 连接成32K x 1 bit 的RAM 、 用 32K x 1 bit 的RAM 连接成32Kx 4 bit RAM。
展开查看详情
1 .Register file construction
Creating read ports
3 .Main Memory
Address
Processor MEMORY
write Data in Data out
read
Memory
ROM (Read only memory)
RAM (Random Access Memory)
SRAM (cache memory) DRAM (Main memory)
4 .Typical sizes of SRAM are
(32 or 64 or 128 or 256) x (1 or 2 or 4 or 8 bits)
address
chip select
SRAM
output enable data out
32K x 8 bits
write enable
data in
How many lines are there in address, data in and data out?
6 .32K x 1 bit RAM using 4 8K x 1 RAMs
Data in
A12-A0 addr
00
CE
01 in
A14-A13
10
addr
11
CE
2-4
in
decoder
addr
CE
in
addr
CE
in
Data out
For each chip, the write enable line is set to 1 during a
write operation, and the output enable lines are set to 1
during a read operation.
7 .32Kx 4 bit RAM using 32K x 1 bit RAMs
Data in
A14-A0
Addr Addr Addr Addr
out out
in in out out
in in
Data out
For each chip, the write enable line is set to 1 during a
write operation, and the output enable lines are set to 1
during a read operation.
