IA70C20 Datasheet, PDF (12/27 Pages) InnovASIC, Inc – 8-Bit Microcontroller

IA70C20
8-Bit Microcontroller
Figure 1. Single-Register Addressing Mode Object Code
Case 1
(PC)
OPCODE
(PC)
Case 2
OPCODE
(PC + 1)
Rn
Case 1
Case 2
<inst> A
<inst> B
<inst> Rn
Data Sheet
August 19, 2008
3.2 Dual-Register Addressing Mode
In dual register addressing mode, instructions use a source and a destination
register that each contain 8-bit operands. The source register is always listed prior
to the destination register in the assembly language. Figure 2 illustrates the byte
requirements for all dual addressing mode instructions.
Figure 2. Dual-Register Addressing Mode Byte Requirements
Destination
Destination
Source A
B
iop
Rs
A B Rd
12
1
2
223
223
Bytes Needed for
Move Instructions
A
Source A
B1
iop ₂
Rs ₂
B Rd
23
3
23
23
Bytes Needed for
All Other Instructions
IA211030117-05
Page 12 of 27
http://www.Innovasic.com
Customer Support:
1-888-824-4184