h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 428

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

Section 14 Watchdog Timer (WDT)
14.1.3
Table 14.1 describes the WDT input pin.
Table 14.1 WDT Pin
Name
External subclock input pin
14.1.4
The WDT has four registers, as summarized in table 14.2. These registers control clock selection,
WDT mode switching, the reset signal, etc.
Table 14.2 WDT Registers
Channel
0
1
Common
Notes: 1. Lower 16 bits of the address.
Rev. 4.00 Jun 06, 2006 page 374 of 1004
REJ09B0301-0400
2. For details of write operations, see section 14.2.4, Notes on Register Access.
3. Only 0 can be written in bit 7, to clear the flag.
Pin Configuration
Register Configuration
Name
Timer control/status
register 0
Timer counter 0
Timer control/status
register 1
Timer counter 1
System control
register
Symbol
EXCL
Abbreviation R/W
TCSR0
TCNT0
TCSR1
TCNT1
SYSCR
I/O
Input
R/(W) *
R/W
R/(W) *
R/W
R/W
Function
WDT1 prescaler counter input clock
3
3
Initial Value
H'00
H'00
H'00
H'00
H'09
Write *
H'FFA8
H'FFA8
H'FFEA
H'FFEA
H'FFC4
Address *
2
Read
H'FFA8
H'FFA9
H'FFEA
H'FFEB
H'FFC4
1