H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 246

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 11 Watchdog Timer (WDT)
Rev. 2.00 Mar 21, 2006 page 208 of 518
REJ09B0299-0200
(Interrupt request signal*
(Interrupt request signal*
(Interrupt request signal)
RESO signal*
Internal reset signal*
RESO signal*
Internal reset signal*
(Interrupt request signal)
Internal NMI
Internal NMI
WOVI1
WOVI0
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
1
1
2. The internal NMI interrupt signal can be independently output from either WDT_0 or WDT_1.
1
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.
2
2
)
)
Interrupt
Interrupt
Figure 11.1 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
φ/2
φ/64
φ/128
φ/512
φ/2048
φ/8192
φ/32768
φ/131072
interface
interface
φ/2
φ/64
φ/128
φ/512
φ/2048
φ/8192
φ/32768
φ/131072
Bus
Bus
φSUB/2
φSUB/4
φSUB/8
φSUB/16
φSUB/32
φSUB/64
φSUB/128
φSUB/256