COP888GD Datasheet, PDF (37/42 Pages) National Semiconductor (TI) – 8-Bit CMOS ROM Based Microcontrollers with 16k

Instruction Execution Time
Most instructions are single byte (with immediate addressing
mode instructions taking two bytes).
Most single byte instructions take one cycle time to execute.
See the BYTES and CYCLES per INSTRUCTION table for
details.
Bytes and Cycles per Instruction
The following table shows the number of bytes and cycles for
each instruction in the format of byte/cycle.
Arithmetic and Logic Instructions
ADD
ADC
SUBC
AND
OR
XOR
IFEQ
IFNE
IFGT
IFBNE
DRSZ
SBIT
RBIT
IFBIT
[B]
1/1
1/1
1/1
1/1
1/1
1/1
1/1
1/1
1/1
1/1
1/1
1/1
1/1
Direct
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
1/3
3/4
3/4
3/4
RPND
1/1
Immed.
2/2
2/2
2/2
2/2
2/2
2/2
2/2
2/2
2/2
Instructions Using A & C
CLRA
1/1
INCA
1/1
DECA
1/1
LAID
1/3
DCOR
1/1
RRCA
1/1
RLCA
1/1
SWAPA
1/1
SC
1/1
RC
1/1
IFC
1/1
IFNC
1/1
PUSHA
1/3
POPA
1/3
ANDSZ
2/2
Transfer of Control Instructions
JMPL
3/4
JMP
2/3
JP
1/3
JSRL
3/5
JSR
2/5
JID
1/3
VIS
1/5
RET
1/5
RETSK
1/5
RETI
1/5
INTR
1/7
NOP
1/1
Memory Transfer Instructions
X A, (Note *NO
TARGET FOR
FNXref
NS7829*)
LD A, (Note
*NO TARGET
FOR FNXref
NS7829*)
LD B, Imm
LD B, Imm
LD Mem, Imm
LD Reg, Imm
IFEQ MD, Imm
Register
Indirect
[B] [X]
1/1 1/3
1/1 1/3
2/2
Direct
2/3
2/3
3/3
2/3
3/3
Note 33: = > Memory location addressed by B or X or directly.
Immed.
2/2
1/1
2/2
Register Indirect
Auto Incr. & Decr.
[B+, B−] [X+, X−]
1/2
1/3
1/2
1/3
2/2
(IF B < 16)
(IF B > 15)
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