SN8P1600
8-bit micro-controller
PROGRAM FLAG
The PFLAG includes carry flag (C), decimal carry flag (DC) and zero flag (Z). If the result of operating is zero or there
is carry, borrow occurrence, then these flags will be set to PFLAG register.
086H
PFLAG
Read/Write
After reset
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
C
R/W
0
Bit 1
DC
R/W
0
Bit 0
Z
R/W
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CARRY FLAG
C = 1: When executed arithmetic addition with overflow or executed arithmetic subtraction without borrow or executed
rotation instruction with logic “1” shifting out.
C = 0: When executed arithmetic addition without overflow or executed arithmetic subtraction with borrow or executed
rotation instruction with logic “0” shifting out.
DECIMAL CARRY FLAG
DC = 1: If executed arithmetic addition with overflow of low nibble or executed arithmetic subtraction without borrow of
low nibble.
DC = 0: If executed arithmetic addition without overflow of low nibble or executed arithmetic subtraction with borrow of
low nibble.
ZERO FLAG
Z = 1: When the content of ACC or target memory is zero after executing instructions involving a zero flag.
Z = 0: When the content of ACC or target memory is not zero after executing instructions involving a zero flag.
SONiX TECHNOLOGY CO., LTD
Page 27
Revision 1.94
SONIX [ SONIX TECHNOLOGY COMPANY ]
