HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 367

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

14.2
The WDT has the pins listed in table 14.1.
Table 14.1 Pin Configuration
Name
Reset output pin
External sub-clock
input pin
14.3
The WDT has the following registers. To prevent accidental overwriting, TCSR and TCNT have
to be written to in a method different from normal registers. For details, refer to section 14.6.1,
Notes on Register Access. For details on the system control register, refer to section 3.2.2, System
Control Register (SYSCR).
14.3.1
TCNT is an 8-bit readable/writable up-counter.
TCNT is initialized to H'00 when the TME bit in the timer control/status register (TCSR) is
cleared to 0.
Timer counter (TCNT)
Timer control/status register (TCSR)
Input/Output Pins
Register Descriptions
Timer Counter (TCNT)
Symbol
5(62
EXCL
I/O
Output
Input
Function
Outputs the counter overflow signal in
watchdog timer mode
Inputs the clock pulses to the WDT_1
prescaler counter
Rev. 2.0, 08/02, page 327 of 788