M166 Datasheet, PDF (80/127 Pages) Siemens Semiconductor Group – C16x Family of Siemens 16-Bit CMOS Single-Chip Microcontrollers

30Mar98@15:00h
C166 Family Instruction Set
Instruction Description
JNB
Relative Jump if Bit Clear
JNB
Syntax
Operation
Data Types
Description
JNB
op1, op2
IF (op1) = 0 THEN
(IP) ← (IP) + sign_extend (op2)
ELSE
Next Instruction
END IF
BIT
If the bit specified by op1 is clear, program execution continues at the
location of the instruction pointer, IP, plus the specified displacement, op2.
The displacement is a two’s complement number which is sign extended
and counts the relative distance in words. The value of the IP used in the
target address calculation is the address of the instruction following the
JNB instruction. If the specified bit is set, the instruction following the JNB
instruction is executed.
Condition Flags
E
Z
V
C
N
-
-
-
-
-
Addressing Modes
E Not affected.
Z Not affected.
V Not affected.
C Not affected.
N Not affected.
Mnemonic
JNB
bitaddr_Q.q, rel
Format
9A QQ rr q0
Bytes
4
Semiconductor Group
80
Version 1.2, 12.97