CHAPTER 9. INSTRUCTION SET

9.3OPERATION CODE OF EACH INSTRUCTION

(1) Description of operation code symbols

R1

R0

reg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

1

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

0

L

reg

 

 

 

 

 

 

reg

1

1

1

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N2

N1

N0

 

IE×××

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

 

IEBT

 

 

 

 

1

0

1

 

IECSI

 

 

 

 

1

1

0

 

IE0

 

 

 

 

1

1

1

 

IE2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1

reg-pair

0XA

1HL

rp

In : Immediate data for n4, n8

Dn : Immediate data for mem

Bn : Immediate data for bit

Nn : Immediate data for n, IE×××

An : Immediate data for [relative address distance with branch address (2 to 16)] - 1

Sn : Immediate data for one’s complement of [relative address distance with branch address (15 to 1)]

(2) Bit manipulation addressing operation code

bit-addr of the second byte of the operation code of an instruction with fmem. bit at the operands is shown below.

 

 

 

bit-addr

 

 

 

Accessible bits

 

 

 

 

 

 

 

 

 

1

0

B1

B0

F3

F2

F1

F0

Operable bits of FB0H to FBFH

 

 

 

 

 

 

 

 

 

1

1

B1

B0

F3

F2

F1

F0

Operable bits of FF0H to FFFH

 

 

 

 

 

 

 

 

 

Bn : Immediate data for bit address (0 to 3) described at bit

Fn : Immediate data for low-order four bits of address described at fmem

156

Page 167
Image 167
NEC PD75402A Instruction SET Operation Code of Each Instruction, Description of operation code symbols, Iebt Iecsi IE0 IE2