HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 355

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

11.1.4
Table 11.2 summarizes the WDT registers.
Table 11.2 WDT Registers
Notes: 1. Lower 20 bits of the address in advanced mode.
11.2
11.2.1
TCNT is an 8-bit readable and writable up-counter.
Note: The method for writing to TCNT is different from that for general registers to prevent
When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from an internal
clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from
H'FF to H'00), the OVF bit is set to 1 in TCSR. TCNT is initialized to H'00 by a reset and when
the TME bit is cleared to 0.
Write*
H'FFF8C H'FFF8C Timer control/status register
H'FFF8E H'FFF8F Reset control/status register
Bit
Initial value
Read/Write
Address*
2
inadvertent overwriting. For details see section 11.2.4, Notes on Register Access.
2. Write word data starting at this address.
3. Only 0 can be written in bit 7, to clear the flag.
Register Configuration
Register Descriptions
Timer Counter (TCNT)
Read
H'FFF8D Timer counter
1
R/W
7
0
Name
R/W
6
0
R/W
5
0
R/W
4
0
Rev.4.00 Aug. 20, 2007 Page 311 of 638
Abbreviation
TCSR
TCNT
RSTCSR
R/W
3
0
R/W
2
0
R/(W)*
R/W
R/(W)*
R/W
11. Watchdog Timer
R/W
REJ09B0395-0400
1
0
3
3
Initial Value
H'18
H'00
H'3F
R/W
0
0