UPD78P324 Datasheet, PDF (14/80 Pages) NEC – 16-/8-Bit Single-Chip Microcomputers

µPD78P324, 78P324(A)
1.3 PIN I/O CIRCUIT AND UNUSED-PIN PROCESSING
The I/O circuits of the pins are shown in Table 1-1 and Figure 1-1 some of them in a simplified form.
Table 1-1. I/O Circuit Types of Pins and Recommended Connection Methods When Unused
Pin Name
P00/RTP0-P07/RTP7
P20/NMI
P21/INTP0-P26/INTP5
P27/INTP6/TI
P30/TXD
P31/RXD
P32/SO/SB0
P33/SI/SB1
P34/SCK
P40/AD0-P47/AD7
P50/A8-P57/A15
P70/AN0-P77/AN7
P80/TO00-P83/TO03
P84/TO10, P85/TO11
P90/RD
P91/WR
P92/TAS
P93/TMD
WDTO
ASTB
EA
RESET
AVDD
AVREF
AVSS
VPP
NC
I/O Circuit Type
Recommended Connection Method When Unused
5
Input status: Connected to VDD or VSS via a resistor individually.
Output status: No connection required.
2
Connected to VSS.
5
8
Input status: Connected to VDD or VSS via a resistor individually.
Output status: No connection required.
5
9
Connected to Vss.
5
Input status: Connected to VDD or Vss via a resistor individually.
Output status: No connection required.
5
3
No connection required.
4
1
—
2
—
—
Connected to VDD.
—
Connected to VSS.
—
Connected to VDD.
—
Connected to VSS. (It is also possible to leave this unconnected.)
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