h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 1073

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

TCNT0—Timer Counter 0
RSTCSR—Reset Control/Status Register
Bit
Initial value
Read/Write
Note: * Can only be written with 0 for flag clearing.
Bit
Initial value
Read/Write
Note: TCNT is write-protected by a password to prevent accidental overwriting.
For details see section 12.2.4, Notes on Register Access.
Watchdog Overflow Flag
0
1
RSTCSR is write-protected by a password to prevent accidential overwriting.
For details see section 12.2.4, Notes on Register Access.
[Clearing condition]
Cleared by reading TCSR when WOVF = 1, then writing 0 to WOVF
[Setting condition]
Set when TCNT overflows (changed from H'FF to H'00) during watchdog timer
operation
R/(W) *
WOVF
R/W
7
0
7
0
Note: * The modules within the H8S/2646 are not reset,
Reset Enable
RSTE
R/W
R/W
0
1
6
0
6
0
Reset signal is not generated if TCNT overflows *
Reset signal is generated if TCNT overflows
but TCNT and TCSR within the WDT are reset.
R/W
—
—
5
0
5
0
R/W
—
—
4
0
Up-counter
4
1
Rev. 5.00 Sep 22, 2005 page 1047 of 1136
H'FF74(W), H'FF75(R)
H'FF76(W), H'FF77(R)
R/W
—
—
3
0
3
1
Appendix B Internal I/O Register
R/W
—
—
2
0
2
1
R/W
—
—
1
0
REJ09B0257-0500
1
1
R/W
—
—
0
0
0
1
WDT0
WDT0