h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 433

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Note:
14.2.3
Only bit 3 is described here. For details on functions not related to the watchdog timer, see
sections 3.2.2 and 5.2.1, System Control Register (SYSCR), and the descriptions of the relevant
modules.
Bit 4
PSS
0
1
Bit
Initial value
Read/Write
WDT1 input clock selection
* The overflow period is the time from when TCNT starts counting up from H'00 until
System Control Register (SYSCR)
Bit 2
CKS2
0
1
0
1
overflow occurs.
CS2E
R/W
Bit 1
CKS1
0
1
0
1
0
1
0
1
7
0
IOSE
R/W
Bit 0
CKS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
6
0
INTM1
R
5
0
Clock
/2 (Initial value) 25.6 µs
/64
/128
/512
/2048
/8192
/32768
/131072
SUB/2
SUB/4
SUB/8
SUB/16
SUB/32
SUB/64
SUB/128
SUB/256
INTM0
R/W
4
0
Rev. 4.00 Jun 06, 2006 page 379 of 1004
XRST
Overflow Period * (when
and SUB = 32.768 kHz)
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
R
3
1
Section 14 Watchdog Timer (WDT)
Description
NMIEG
R/W
2
0
R/W
HIE
REJ09B0301-0400
1
0
= 20 MHz
RAME
R/W
0
1