UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 157

• 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

(2) When the watchdog timer operation clock is the low-speed internal oscillation clock (f
Watchdog timer
CPU operation
instruction is executed
When the STOP instruction is executed, operation of the watchdog timer is stopped. After STOP mode is
released, operation stops for 34
operation was stopped. At this time, the counter is not cleared to 0 but holds its value.
Figure 9-7. Operation in STOP Mode (WDT Operation Clock: Low-Speed Internal Oscillation Clock)
Note The operation stop time is 17
Watchdog timer
CPU operation
f
CPU
f
RL
Operating
operation
Normal
<2> CPU clock: High-speed internal oscillation clock or external clock input
f
CPU
f
RL
Operating
operation
Normal
STOP
Oscillation stopped
Operation stopped
<1> CPU clock: Crystal/ceramic oscillation clock
µ
s (TYP.) and then counting is started again using the operation clock before the
STOP
CHAPTER 9 WATCHDOG TIMER
stopped
Operation
Oscillation stopped
Operation stopped
µ
s (MIN.), 34
User’s Manual U16898EJ5V0UD
Note
stopped
Operation
Oscillation stabilization time
Oscillation stabilization time
µ
s (TYP.), and 67
(set by OSTS register)
Note
Operating
µ
s (MAX.).
Normal operation
Operating
Normal operation
RL
) when the STOP
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