UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 279

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

Remark If the overflow time is set to 2
<When window open period is 25%>
• Overflow time:
• Window close time:
• Window open time:
Window close time
Window open time
2
0 to 2
2
= 3.56 to 3.88 ms
10
10
/f
/f
RL
RL
10
(MAX.) = 2
(MIN.) × (1 − 0.25) to 2
/f
RL
(MIN.) × (1 − 0.25) = 0 to 2
CHAPTER 11 WATCHDOG TIMER
10
/264 kHz (MAX.) = 3.88 ms
0 to 3.56 ms
3.56 to 3.88 ms
User’s Manual U17554EJ4V0UD
25%
10
/f
RL
10
/f
, the window close time and open time are as follows.
RL
(MAX.) = 2
10
0 to 2.37 ms
2.37 to 3.88 ms
/216 kHz (MIN.) × 0.75 = 0 to 3.56 ms
Setting of Window Open Period
50%
10
/216 kHz (MIN.) × 0.75 to 2
0 to 0.119 ms
0.119 to 3.88 ms
75%
None
0 to 3.88 ms
10
/264 kHz (MAX.)
100%
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