TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 131

• Manufacturer Part Number: TSC80251
• Manufacturer: TEMIC [TEMIC Semiconductors]

TSC80251
JBC bit51,rel JBC bit,rel
Function:
Jump if bit is set and clear bit.
Description:
If the specified bit is one, branch to the specified address; otherwise proceed with the next instruction. The bit is not
cleared if it is already a zero. The branch destination is computed by adding the signed relative displacement in the
third instruction byte to the PC, after incrementing the PC to the first byte of the next instruction.
Note :
When this instruction is used to test an output pin, the value used as the original data is read from the output data latch, not the input pin.
Example :
The accumulator contains 56h (01010110B). After the instruction sequence:
the accumulator contains 52h (01010010B) and program execution continues at label LABEL2.
JBC bit51,rel
[Encoding]
JBC bit,rel
[Encoding]
5.86
FLAGS :
Hex Code in:
Binary Mode = [Encoding]
Source Mode = [Encoding]
Hex Code in:
Binary Mode = [A5][Encoding]
Source Mode = [Encoding]
0001
1010
JBC ACC.3,LABEL1
JBC ACC.2,LABEL2
CY
!
0000
1001
AC
_
bit addr
0001
OV
_
rel addr
0yyy
Operation:
JBC
(PC)
IF [(bit51) = 1]
Operation:
JBC
(PC)
IF [(bit51) = 1]
THEN
(bit51)
(PC)
THEN
(bit51)
(PC)
(PC) + 3
(PC) + 3
(PC) + rel
(PC) + rel
0
0
bit addr
N
_
rel addr
Rev. C – May 7, 1999
Z
_