h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 257

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

11.2
The WDT has the pins listed in table 11.1.
Table 11.1 Pin Configuration
11.3
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 11.6.1,
Notes on Register Access. For details on the system control register, refer to section 3.2.2, System
Control Register (SYSCR).
• Timer counter (TCNT)
• Timer control/status register (TCSR)
11.3.1
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.
Name
Reset output pin
External sub-clock input pin EXCL
Input/Output Pins
Register Descriptions
Timer Counter (TCNT)
Symbol
RESO
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. 1.00, 05/04, page 223 of 544