COP888XG Datasheet, PDF (43/53 Pages) National Semiconductor (TI) – 8-Bit CMOS ROM Based Microcontrollers with 4k to 24k Memory, Comparators and USART

Instruction Set
Register and Symbol Definition
Registers
A
8-Bit Accumulator Register
B
8-Bit Address Register
X
8-Bit Address Register
S
8-Bit Segment Register
SP
8-Bit Stack Pointer Register
PC
15-Bit Program Counter Register
PU
Upper 7 Bits of PC
PL
Lower 8 Bits of PC
C
1 Bit of PSW Register for Carry
HC
1 Bit of PSW Register for Half Carry
GIE
1 Bit of PSW Register for Global Interrupt
Enable
VU
Interrupt Vector Upper Byte
VL
Interrupt Vector Lower Byte
[B]
[X]
MD
Mem
Meml
Imm
Reg
Bit
←
↔
Symbols
Memory Indirectly Addressed by B Register
Memory Indirectly Addressed by X Register
Direct Addressed Memory
Direct Addressed Memory or [B]
Direct Addressed Memory or [B] or
Immediate Data
8-Bit Immediate Data
Register Memory: Addresses F0 to FF
(Includes B, X and SP)
Bit Number (0 to 7)
Loaded with
Exchanged with
43
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