NEC PD78076Y User Manual

NEC

97

CHAPTER 4 PIN FUNCTION (

µ

PD78078Y SUBSERIES)

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

Pin Name

Input/Output

Input/Output

Recommended Connection of Unused Pins

Circuit Type

P50/A8 to P57/A15

5-A

Input/output

Connect independently via a resistor to V

DD

or V

SS

.

P60 to P63 (Mask ROM version)

13-B

Input/output

Connect independently via a resistor

P60 to P63 (

µ

PD78P078Y)

13-D

to V

DD

.

P64/RD

5-A

Input/output

Connect independently via a resistor

P65/WR

to V

DD

or V

SS

.

P66/WAIT

P67/ASTB

P70/SI2/RxD

8-A

P71/SO2/TxD

5-A

P72/SCK2/ASCK

8-A

P80/A0 to P87/A7

5-A

P90 to P93 (Mask ROM version)

13-B

Input/output

Connect independently via a resistor

P90 to P93 (

µ

PD78P078Y)

13-D

to V

DD

.

P94 to P96

5-A

Input/output

Connect independently via a resistor

P100/TI5/TO5

8-A

to V

DD

or V

SS

.

P101/TI6/TO6

P102, P103

5-A

P120/RTP0 to P127/RTP7

5-A

P130/ANO0, P131/ANO1

12-A

Input/output

Connect independently via a resistor to V

SS

.

RESET

2

Input

—

XT2

16

—

Open

AV

REF0

—

Connect to V

SS

.

AV

REF1

Connect to V

DD

.

AV

DD

AV

SS

Connect to V

SS

.

IC (Mask ROM version)

Connect directly to V

SS

.

V

PP

(

µ

PD78P078Y)