HD6473032F16 Datasheet, PDF (775/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

TCNT—Timer Counter
Appendix B Internal I/O Register
H'A9 (read),
H'A8 (write)
WDT
Bit
7
6
5
4
3
2
1
0
Initial value
0
0
0
Read/Write
R/W
R/W R/W
RSTCSR—Reset Control/Status Register
Bit
7
6
5
WRST
—
—
Initial value
0
0
1
Read/Write
R/(W)*¹ — *²
—
0
0
0
0
R/W R/W R/W R/W
Count value
H'AB (read),
H'AA (write)
4
3
2
1
—
—
—
—
1
1
1
1
—
—
—
—
0
R/W
WDT
0
—
1
—
Watchdog timer reset
0 [Clearing conditions]
• Reset signal input at RES pin
• When WRST= “1”, write “0” after reading WRST flag
1 [Setting condition]
TCNT overflow generates a reset signal
Notes: 1. Only 0 can be written in bit 7, to clear the flag.
2. Bit 6 must not be set to 1; in a write, 0 must always be written in this bit.
Rev. 3.00 Mar 21, 2006 page 745 of 814
REJ09B0302-0300