UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 189

• 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

Note The external clock requires a pulse two cycles longer than internal clock (f
Cautions 1.
Remark f
Address: FF51H
Symbol
PRM03
2.
3.
4.
PRS
: Peripheral hardware clock frequency
Always set data to PRM03 after stopping the timer operation.
If the valid edge of the TI003 pin is to be set for the count clock, do not set the clear & start
mode using the valid edge of the TI003 pin and the capture trigger.
If the TI003 or TI013 pin is high level immediately after system reset, the rising edge is
immediately detected after the rising edge or both the rising and falling edges are set as the
valid edge(s) of the TI003 pin or TI013 pin to enable the operation of 16-bit timer counter 03
(TM03). Care is therefore required when pulling up the TI003 or TI013 pin. However, when re-
enabling operation for TI003 pin or TI013 pin are high level after the operation has been
stopped, the rising edge is not detected.
When TI013 pin is used valid edge, it cannot be used as the timer output (TO03) to P132, and
when TO03 is used, it cannot be used to the TI013 pin valid edge.
PRM031
ES131
ES131
ES031
7
0
0
1
1
0
0
1
1
0
0
1
1
After reset: 00H
Figure 7-24. Format of Prescaler Mode Register 03 (PRM03)
CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 TO 03
PRM030
ES130
ES030
ES130
6
0
1
0
1
0
1
0
1
0
1
0
1
R/W
Falling edge
Rising edge
Setting prohibited
Both falling and rising edges
Falling edge
Rising edge
Setting prohibited
Both falling and rising edges
f
f
f
TI003 valid edge
PRS
PRS
PRS
ES031
/2
/2
User’s Manual U17554EJ4V0UD
5
4
6
ES030
4 MHz
250 kHz
62.5 kHz
Note
f
PRS
4
= 4 MHz
TI013 pin valid edge selection
TI003 pin valid edge selection
Count clock selection
3
0
5 MHz
312.5 kHz
78.125 kHz
f
PRS
= 5 MHz
2
0
PRS
10 MHz
625 kHz
156.25 kHz
f
PRS
).
= 10 MHz f
PRM031
1
20 MHz
1.25 MHz
312.5 kHz
PRS
PRM030
= 20 MHz
0
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