2 CPu
2-6
Seiko epson Corporation
S1C17624/604/622/602/621 TeChniCal Manual
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 S1C17624/604/622/602/621 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.