HD6432621 Hitachi, HD6432621 Datasheet - Page 444

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

12.1.3
Table 12-1 describes the WDT output pin.
Table 12-1 WDT Pin
Name
Watchdog timer overflow
Buzzer output *
Note: * Cannot be used in the H8S/2623 Series.
12.1.4
Table 12-2 summarizes the WDT register configuration. These registers control clock selection,
WDT mode switching, and the reset signal.
Table 12-2 WDT Registers
Channel Name
0
1*
All
Notes: *1 Lower 16 bits of the address.
400
4
*2 For details of write operations, see section 12.2.5, Notes on Register Access.
*3 Only a write of 0 is permitted to bit 7, to clear the flag.
*4 Cannot be used in the H8S/2623 Series.
Pin Configuration
Register Configuration
Timer control/status register 0 TCSR0
Timer counter 0
Reset control/status register
Timer control/status register 1 TCSR1
Timer counter 1
Pin function control register
Symbol
WDTOVF
BUZZ
Abbreviation R/W
TCNT0
RSTCSR
TCNT1
PFCR
I/O
Output
Output
Function
Outputs counter overflow signal in watchdog
timer mode
Outputs clock selected by watchdog timer
(WDT1)
R/(W)*
R/W
R/(W)*
R/(W)*
R/W
R/W
3
3
3
Initial Value Write*
H'18
H'00
H'1F
H'00
H'00
H'0D/H'00
H'FF74 H'FF74
H'FF74 H'FF75
H'FF76 H'FF77
H'FFA2 H'FFA2
H'FFA2 H'FFA3
H'FDEB
Address*
2
Read
1