h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 400

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 14 Watchdog Timer (WDT)
Rev. 3.00 Mar 21, 2006 page 346 of 788
REJ09B0300-0300
(Interrupt request signal *
(Interrupt request signal *
(Interrupt request signal)
RESO signall *
Internal reset signal *
RESO signal *
Internal reset signal *
(Interrupt request signal)
Legend:
TCSR_0 : Timer control/status register_0
TCNT_0 : Timer counter_0
TCSR_1 : Timer control/status register_1
TCNT_1 : Timer counter_1
Notes: 1. The RESO signal outputs the low level signal when the internal reset signal is
Internal NMI
Internal NMI
WOVI1
WOVI0
2. The internal NMI interrupt signal can be independently output from either WDT_0 or WDT_1.
generated due to a TCNT overflow of either WDT_0 or WDT_1. The internal reset signal
first resets the WDT in which the overflow has occurred first.
The interrupt controller does not distinguish the NMI interrupt request from WDT_0 from
that from WDT_1.
1
1
1
1
2
2
)
)
Interrupt
Interrupt
Figure 14.1 Block Diagram of WDT
control
control
control
control
Reset
Reset
Overflow
Overflow
Module bus
Module bus
TCNT_1
TCNT_0
Clock
Clock
WDT_0
WDT_1
selection
selection
TCSR_1
Clock
TCSR_0
Clock
Internal clock
Internal clock
interface
interface
/2
/64
/128
/512
/2048
/8192
/32768
/131072
Bus
Bus
/2
/64
/128
/512
/2048
/8192
/32768
/131072
SUB/2
SUB/4
SUB/8
SUB/16
SUB/32
SUB/64
SUB/128
SUB/256