Panasonic F77G, MN101C77C user manual Instruction Execution Controller Configuration

Models: F77G MN101C77C

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Chapter 2 CPU Basics

2-1-3 Instruction Execution Controller

The instruction execution controller consists of four blocks: memory, instruction queue, instruction regis- ters, and instruction decoder.

Instructions are fetched in 1-byte units, and temporarily stored in the 2-byte instruction queue. Transfer is made in 1-byte or half-byte units from the instruction queue to the instruction register to be decoded by the instruction decoder.

70

Memory

 

 

Fetch

 

 

1

 

 

 

byte

15

0

Instruction queue

 

 

 

 

 

1 byte or a half byte

7

0

 

Instruction register

 

 

Instruction decoder

Instruction decoding

 

 

CPU control signals

Figure 2-1-2 Instruction Execution Controller Configuration

Overview II - 5

Page 57
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Panasonic F77G, MN101C77C user manual Instruction Execution Controller Configuration