COP8ACC7 Datasheet, PDF (34/40 Pages) National Semiconductor (TI) – 8-Bit CMOS OTP Microcontroller with 16k Memory and High Resolution A/D

Instruction Set (Continued)
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.
Skipped instructions require x number of cycles to be
skipped, where x equals the number of bytes in the skipped
instruction opcode.
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
[B]
ADD
1/1
ADC
1/1
SUBC 1/1
AND
1/1
OR
1/1
XOR
1/1
IFEQ 1/1
IFGT 1/1
IFBNE 1/1
DRSZ 1/1
SBIT 1/1
RBIT 1/1
IFBIT 1/1
Direct
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
Immed
2/2
2/2
2/2
2/2
2/2
2/2
2/2
2/2
1/3
3/4
3/4
3/4
RPND 1/1
Instructions Using A and C
CLRA
1/1
INCA
1/1
DECA
1/1
LAID
1/3
DCORA
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 21)
LD A, (Note 21)
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 Immed.
2/3
2/3
2/2
1/1
2/2
3/3
2/3
3/3
Register Indirect
Auto Incr and Decr
[B+, B−] [X+, X−]
1/2
1/3
1/2
1/3
2/2
(If B < 16)
(If B > 15)
Note 21: Memory location addressed by B or X or directly.
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