UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 37

• 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

2.3 Pin I/O Circuits and Recommended Connection of Unused Pins
Table 2-4 shows the types of pin I/O circuits and the recommended connections of unused pins.
Refer to Figure 2-1 for the configuration of the I/O circuit of each type.
Note Connect P31/TI002/INTP2 as follows when writing the flash memory with a flash
P00/TI000
P01/TI010/TO00
P05/SSI11/TI001
P06/TI011/TO01
P10/SCK10/TxD61
P11/SI10/RxD61
P12/SO10
P13/TxD60
P14/RxD60
P15/TOH0
P16/TOH1/INTP5
P17/TI50/TO50
P30/INTP1
P31/TI002/INTP2
P32/TI012/TO02/INTP3
P33/TI51/TO51/INTP4
P40 to P43
P50 to P53
P60 to P63
P70/CTxD
P71/CRxD
P72/PCL/INTP6
P73/BUZ/INTP7
P74/SO11
P75/SI11
P76/SCK11
programmer.
- P31/TI002/INTP2: Connect to EV
The above connection is not necessary when writing the flash memory by means of self
programming.
Pin Name
Note
Table 2-4. Pin I/O Circuit Types (1/2)
5-AH
5-H
5-AH
5-H
5-AH
5-H
13-P
5-H
5-AH
5-H
5-AH
CHAPTER 2 PIN FUNCTIONS
I/O Circuit
User’s Manual U17554EJ4V0UD
Type
SS
via a resistor (10 kΩ: recommended).
I/O
I/O
Input:
EV
Output: Leave open.
Input:
Output: Leave this pin open at low-level
output after clearing the output latch of the
port to 0.
Input:
EV
Output: Leave open.
Recommended Connection of Unused Pins
SS
SS
via a resistor.
via a resistor.
Independently connect to EV
Independently connect to EV
Connect to EV
SS
.
DD
DD
or
or
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