h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 426

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 14 Watchdog Timer (WDT)
14.1.2
Figures 14.1 (a) and (b) show block diagrams of WDT0 and WDT1.
Rev. 4.00 Jun 06, 2006 page 372 of 1004
REJ09B0301-0400
WOVI
(interrupt request
signal)
Internal NMI
interrupt request
signal *
Legend:
TCSR: Timer control/status register
TCNT: Timer counter
Notes: 1. For the internal reset signal, the reset of the WDT that overflowed first has priority.
Internal reset
signal *
2
Block Diagram
2. The internal NMI interrupt request signal can be output independently by either WDT0 or
1
WDT1. The interrupt controller does not distinguish between NMI interrupt requests from
WDT0 and WDT1.
Interrupt
Figure 14.1 (a) Block Diagram of WDT0
control
control
Reset
Overflow
Module bus
TCNT
Clock
WDT
select
Clock
TCSR
Internal clock
source
interface
Bus
/2
/64
/128
/512
/2048
/8192
/32768
/131072