TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 45

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

TSC80251
4.20
PSW1 (S:D1h)
Program Status Word 1 register
Reset Value = 0000 0000b
Number
CY
Bit
7
6
5
4
3
2
1
0
7
Mnemonic
RS1
RS0
CY
AC
OV
Bit
AC
N
Z
–
6
Figure 4.8. Program Status Word 1 register (PSW1)
Carry flag
Auxiliary Carry flag
Negative flag
Register Bank Select bit 1
Register Bank Select bit 0
Overflow flag
Zero flag
Reserved
Identical to the CY bit in the PSW register (See Figure 4.7. ).
Identical to the AC bit in the PSW register (See Figure 4.7. ).
This bit is set if the result of the last logical or arithmetic operation was negative,
i.e., bit15 = 1. Otherwise it is cleared.
Identical to the RS1 bit in the PSW register (See Figure 4.7. ).
Identical to the RS0 bit in the PSW register (See Figure 4.7. ).
Identical to the OV bit in the PSW register (See Figure 4.7. ).
This flag is set if the result of the last logical or arithmetic operation is zero.
Otherwise it is cleared.
The value read from this bit is indeterminate.
Do not set this bit.
N
5
RS1
4
RS0
3
Description
OV
2
Z
1
Rev. C – May 7, 1999
–
0