h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 426

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

Section 15 Watchdog Timer (WDT)
Rev. 3.00 Jan 25, 2006 page 374 of 872
REJ09B0286-0300
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 generated due to a TCNT
WOVI1
(Interrupt request signal)
Internal NMI
(Interrupt request signal *
RESO signal *
Internal reset signal *
(Interrupt request signal*
RESO signal*
Internal reset signal*
(Interrupt request signal)
Internal NMI
2. The internal NMI interrupt signal can be independently output from either WDT_0 or WDT_1.
WOVI0
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 15.1 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