TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 138

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

Rev. C – May 7, 1999
JNC rel
Function: Jump if carry not set
Description:
If the CY flag is clear, branch to the address specified; otherwise proceed with the next instruction. The branch
destination is computed by adding the signed relative displacement in the second instruction byte to the PC, after
incrementing the PC twice to point to the next instruction. The CY flag is not modified.
Example :
The CY flag is set. The instruction sequence:
clears the CY flag and causes program execution to continue at label LABEL2.
[Encoding]
FLAGS :
Hex Code in:
Binary Mode = [Encoding]
Source Mode = [Encoding]
0101
JNC
CPL CY
JNC
CY
!
LABEL1
LABEL2
0000
AC
_
rel addr
OV
_
Operation:
JNC
(PC)
IF [(CY) = 0]
THEN
(PC)
(PC) + 2
(PC) + rel
N
_
TSC80251
Z
_
5.93