upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 138

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

8.2
138
Watchdog timer enable
register (WDTE)
The watchdog timer consists of the following hardware.
Remarks 1. f
Configuration of Watchdog Timer
f
RL
f
X
/2
/2
2
4
2. f
Control registers
RL
X
: System clock oscillation frequency
: Low-speed internal oscillation clock oscillation frequency
controller
Clock
input
2
Item
Watchdog timer mode
register (WDTM)
0
Figure 8-1. Block Diagram of Watchdog Timer
counter
Table 8-3. Configuration of Watchdog Timer
16-bit
1
Clear
CHAPTER 8 WATCHDOG TIMER
1
Watchdog timer mode register (WDTM)
Watchdog timer enable register (WDTE)
2
2
or
2
2
Internal bus
13
20
11
18
/f
/f
/f
/f
User’s Manual U16994EJ3V0UD
X
X
RL
RL
WDCS4
to
to
Selector
WDCS3
3
WDCS2
WDCS1 WDCS0
Configuration
controller
Output
Internal reset signal
Option byte
(to set “low-speed
internal oscillator cannot be
stopped” or “low-speed
internal oscillator can be
stopped by software”)