2 CPu
2-6
Seiko epson Corporation
S1C17153 TeChniCal Manual
(Rev. 1.0)
D3
PSRC: PSR Carry (C) Flag Bit
The value of the PSR C (carry) flag can be read out.
1 (R):
1
0 (R):
0 (default)
D2
PSRV: PSR Overflow (V) Flag Bit
The value of the PSR V (overflow) flag can be read out.
1 (R):
1
0 (R):
0 (default)
D1
PSRZ: PSR Zero (Z) Flag Bit
The value of the PSR Z (zero) flag can be read out.
1 (R):
1
0 (R):
0 (default)
D0
PSRn: PSR negative (n) Flag Bit
The value of the PSR N (negative) flag can be read out.
1 (R):
1
0 (R):
0 (default)
Processor information
2.5
The S1C17153 has the IDIR register shown below that allows the application software to identify CPU core type.
Processor iD Register (iDiR)
Register name address
Bit
name
Function
Setting
init. R/W
Remarks
Processor iD
Register
(iDiR)
0xffff84
(8 bits)
D7–0
iDiR[7:0]
Processor ID
0x10: S1C17 Core
0x10
0x10
R
This is a read-only register that contains the ID code to represent a processor model. The S1C17 Core’s ID code is
0x10.