h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 439

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

14.1.3
Table 14.1 describes the WDT input pin.
Table 14.1 WDT Pin
Name
Reset output pin
External subclock input pin
Legend:
TCSR: Timer control/status register
TCNT: Timer counter
WOVI1
(interrupt request
signal)
Internal NMI
(interrupt request
signal)
Notes: 1. RESO pin output goes low when the internal reset signal is generated by overflow of TCNT
RESO signal
Internal reset
signal
*2
2. The internal NMI interrupt request signal can be output independently by either WDT0 or
Pin Configuration
*1
in either WDT0 or WDT1. The reset of the WDT that overflowed first takes precedence over
the internal reset signal.
WDT1. The interrupt controller does not distinguish between NMI interrupt requests from
WDT0 and WDT1.
*1
Interrupt
control
control
Reset
Figure 14.1 (b) Block Diagram of WDT1
Symbol
RESO
EXCL
Overflow
Module bus
I/O
Output
Input
TCNT
Clock
WDT1
Function
Watchdog timer mode counter overflow signal
output
WDT1 prescaler counter input clock
Rev. 3.00 Jan 18, 2006 page 411 of 1044
select
Clock
TCSR
Section 14 Watchdog Timer (WDT)
Internal clock
source
interface
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Bus
REJ09B0280-0300
SUB
SUB
SUB
SUB
SUB
SUB
SUB
SUB
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