Single-Chip Microcontrollers User's Manual

CHAPTER 4 PIN FUNCTION (

PD78058FY SUBSERIES)

Table 4-1. Pin Input/Output Circuit Types (2/2)

Pin Name

Input/Output

Input/Output Recommended Connection of Unused Pins

Circuit Type

P60 to P63 (Mask ROM version) 13-I Input/output

Connect independently via a resistor to VDD.

P60 to P63 (PROM version) 13-H Input/output

Connect independently via a resistor to VDD or VSS.

P64/RD 5-D

P65/WR

P66/WAIT

P67/ASTB

P70/SI2/RxD 8-D

P71/SO2/TxD 5-J

P72/SCK2/ASCK 8-D

P120/RTP0 to P127/RTP7 5-J

P130/ANO0 to P131/ANO1 12-B Input/output

Connect independently via a resistor to VSS.

RESET 2 Input —

XT2 16 — Leave open.

AVREF0 — Connect to VSS.

AVREF1 Connect to VDD.

AVDD Connect to a separate power supply with

the same potential as VDD.

AVSS Connect to a separate ground with the

same potential as VSS.

IC (Mask ROM version) Connect directly to VSS.

VPP (PROM version)