M166 Datasheet, PDF (74/127 Pages) Siemens Semiconductor Group – C16x Family of Siemens 16-Bit CMOS Single-Chip Microcontrollers

30Mar98@15:00h
C166 Family Instruction Set
Instruction Description
JB
Relative Jump if Bit Set
JB
Syntax
Operation
Data Types
Description
JB
op1, op2
IF (op1) = 1 THEN
(IP) ← (IP) + sign_extend (op2)
ELSE
Next Instruction
END IF
BIT
If the bit specified by op1 is set, program execution continues at the loca-
tion 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 JB
instruction. If the specified bit is clear, the instruction following the JB
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
JB
bitaddr_Q.q, rel
Format
8A QQ rr q0
Bytes
4
Semiconductor Group
74
Version 1.2, 12.97