h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 427

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

15.2
The WDT has the pins listed in table 15.1.
Table 15.1 Pin Configuration
15.3
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, see section 15.6.1, Notes
on Register Access. For details on the system control register, see section 3.2.2, System Control
Register (SYSCR).
15.3.1
TCNT is an 8-bit readable/writable up-counter.
TCNT is initialized to H'00 when the TME bit in timer control/status register (TCSR) is cleared to
0.
Name
Reset output pin
External sub-clock
input pin
Timer counter_0 (TCNT_0)
Timer control/status register_0 (TCSR_0)
Timer counter_1 (TCNT_1)
Timer control/status register_1 (TCSR_1)
Register Descriptions
Timer Counter (TCNT)
Input/Output Pins
Symbol
RESO
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. 3.00 Jan 25, 2006 page 375 of 872
Section 15 Watchdog Timer (WDT)
REJ09B0286-0300