UPD784224 Datasheet, PDF (16/92 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784224, 784225, 784224Y, 784225Y
5.3 I/O Circuit Type of Respective Pins and Recommended Connections of Unused Pins
Table 5-1 shows symbols indicating the I/O circuit types of the respective pins and the recommended connection
of unused pins.
For the circuit diagram of each type of I/O circuit, refer to Figure 5-1.
Table 5-1. I/O Circuit Type of Respective Pins and Recommended Connections of Unused Pins (1/2)
Pin Name
P00/INTP0
P01/INTP1
P02/INTP2/NMI
P03/INTP3 to P05/INTP5
P10/ANI0 to P17/ANI7
P20/RxD1/SI1
P21/TxD1/SO1
P22/ASCK1/SCK1
P23/PCL
P24/BUZ
P25/SDA0^Note/SI0
P26/SO0
P27/SCL0^Note/SCK0
P30/TO0 to P32/TO2
P33/TI1, P34/TI2
P35/TI00, P36/TI01
P37/EXA
P40/AD0 to P47/AD7
P50/A8 to P57/A15
P60/A16 to P63/A19
P64/RD
P65/WR
P66/WAIT
P67/ASTB
P70/RxD2/SI2
P71/TxD2/SO2
P72/ASCK2/SCK2
I/O Circuit Type
I/O
Recommended Connections of Unused Pins
8-K
I/O
Input : Individually connected to VSS0 via resistor
Output: Open
9
10-I
10-J
10-I
10-J
10-I
10-J
10-I
8-M
8-K
8-L
8-M
5-H
Input
I/O
Connected to VSS0 or VDD0
Input : Individually connected to VSS0 via resistor
Output: Open
8-K
8-L
8-K
Note This function is available in µPD784255Y Subseries only.
Remark Because the circuit type numbers are standardized among the 78K Series products, they are not
sequential in some models (i.e., some circuits are not provided).
16
Data Sheet U12376EJ1V0DS00