C8051F304 View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
MFG CO.
'C8051F304' PDF : 177 Pages View PDF
C8051F300/1/2/3/4/5
Table 8.1. CIP-51 Instruction Set Summary (Continued)
Mnemonic
Description
Bytes
JNZ rel
Jump if A does not equal zero
2
CJNE A, direct, rel
Compare direct byte to A and jump if not equal
3
CJNE A, #data, rel
Compare immediate to A and jump if not equal
3
CJNE Rn, #data, rel
Compare immediate to Register and jump if not
3
equal
CJNE @Ri, #data, rel
Compare immediate to indirect and jump if not
3
equal
DJNZ Rn, rel
Decrement Register and jump if not zero
2
DJNZ direct, rel
Decrement direct byte and jump if not zero
3
NOP
No operation
1
Clock
Cycles
2/3
3/4
3/4
3/4
4/5
2/3
3/4
1
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 (two’s 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 8K-byte program memory space.
There is one unused opcode (0xA5) that performs the same function as NOP.
All mnemonics copyrighted © Intel Corporation 1980.
62
Rev. 2.9
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