C8051F124-GQR Datasheet, PDF (132/350 Pages) Silicon Laboratories – Mixed Signal ISP Flash MCU Family

C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
Table 11.1. CIP-51 Instruction Set Summary (Continued)
Mnemonic
Description
Bytes
Clock
Cycles
JZ rel
Jump if A equals zero
2
2/3*
JNZ rel
Jump if A does not equal zero
2
2/3*
CJNE A, direct, rel
Compare direct byte to A and jump if not equal
3
3/4*
CJNE A, #data, rel
Compare immediate to A and jump if not equal
3
3/4*
CJNE Rn, #data, rel
Compare immediate to Register and jump if not
equal
3
3/4*
CJNE @Ri, #data, rel
Compare immediate to indirect and jump if not
equal
3
4/5*
DJNZ Rn, rel
Decrement Register and jump if not zero
2
2/3*
DJNZ direct, rel
Decrement direct byte and jump if not zero
3
3/4*
NOP
No operation
1
1
* Branch instructions will incur a cache-miss penalty if the branch target location is not already stored in
the Branch Target Cache. See Section “16. Branch Target Cache” on page 211 for more details.
Notes on Registers, Operands and Addressing Modes:
Rn - Register R0-R7 of the currently selected register bank.
@Ri - Data RAM location addressed indirectly through R0 or R1.
rel - 8-bit, signed (2s complement) offset relative to the first byte of the following instruction. Used by
SJMP and all conditional jumps.
direct - 8-bit internal data location’s address. This could be a direct-access Data RAM location (0x00-
0x7F) or an SFR (0x80-0xFF).
#data - 8-bit constant
#data16 - 16-bit constant
bit - Direct-accessed bit in Data RAM or SFR
addr11 - 11-bit destination address used by ACALL and AJMP. The destination must be within the same
2K-byte page of program memory as the first byte of the following instruction.
addr16 - 16-bit destination address used by LCALL and LJMP. The destination may be anywhere within
the 64K-byte program memory space.
There is one unused opcode (0xA5) that performs the same function as NOP.
All mnemonics copyrighted © Intel Corporation 1980.
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Rev. 1.4