3069RF-ZTAT Datasheet, PDF (912/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

TCNT—Timer Counter
H'FFF8D (read), H'FFF8C (write)
WDT
Bit
7
6
5
4
3
2
1
0
Initial value
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
Count value
0
R/W
0
0
R/W
R/W
RSTCSR—Reset Control/Status Register
H'FFF8F (read), H'FFF8E (write)
WDT
Bit
7
6
5
4
3
WRST
Initial value
0
0
1
1
1
Read/Write R/(W)*
R/W
2
1
0
1
1
1
Reserved bits
Watchdog timer reset
0 ^{[Clearing conditions]}
Reset signal at 4-5 pin
Read WRST when WRST = 1, then write 0 in WRST
[Setting condition]
1 _{TCNT overflow generates a reset signal}
Note: * Only 0 can be written in bit 7, to clear the flag.
Rev. 5.0, 09/04, page 890 of 978