h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 485

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

WDT1 Input Clock Select
Notes: 1. An overflow period is the time interval between the start of counting up from H'00 on the
Bit 4
PSS *
0
0
1
2
2. Subclock functions (subactive mode, subsleep mode, and watch mode) are available in
Bit 2
CKS2
0
1
1
0
1
TCNT and the occurrence of a TCNT overflow.
the U-mask and W-mask versions, and H8S/2635 Group only.
These functions cannot be used with the other versions, therefore PSS bit is reserved.
0 should be written when writing.
Bit 1
CKS1
0
1
0
1
1
0
1
0
1
Bit 0
CKS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Description
Clock
/2 (initial value)
/64
/128
/512
/2048
/8192
/32768
/131072
SUB/2 *
SUB/4 *
SUB/8 *
SUB/16 *
SUB/32 *
SUB/64 *
SUB/128 *
SUB/256 *
2
2
2
2
2
2
2
2
Overflow Period *
(where SUB *
25.6 µs
819.2 µs
1.6 ms
6.6 ms
26.2 ms
104.9 ms
419.4 ms
1.68 s
15.6 ms
31.3 ms
62.5 ms
125 ms
250 ms
500 ms
1 s
2 s
Rev. 6.00 Feb 22, 2005 page 425 of 1484
Section 12 Watchdog Timer
2
= 32.768 kHz)
1
(where
REJ09B0103-0600
= 20 MHz)