UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 158

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

9.4.4
the watchdog timer is the system clock (f
counting is started again using the operation clock before the operation was stopped. At this time, the counter is not
cleared to 0 but holds its value.
158
The watchdog timer stops counting during HALT instruction execution regardless of whether the operation clock of
CPU operation
Watchdog timer
Watchdog timer operation in HALT mode (when “low-speed internal oscillator can be stopped by
software” is selected by option byte)
f
X
or f
f
CPU
RL
Normal operation
Operating
Operation stopped
HALT
Figure 9-8. Operation in HALT Mode
X
) or low-speed internal oscillation clock (f
CHAPTER 9 WATCHDOG TIMER
User’s Manual U16898EJ5V0UD
Normal operation
Operating
RL
). After HALT mode is released,