IBM nec pd78p081(a2) User Manual

Pin Name

Input/Output

Input/Output

Recommended Connection for Unused Pins

Circuit Type

P00

2

Input

Connect to V

SS

.

P01/INTP1

8-A

Input/Output

Independently connect to V

SS

 via a resistor.

P02/INTP2

P03/INTP3

P10/ANI0-P17/ANI7

11

Input/Output

Independently connect to V

DD

 or V

SS

 via

P30-P32

5-A

a resistor.

P33, P34

8-A

P35/PCL

5-A

P36/BUZ

P37

P50-P57

5-A

P70/SI2/RxD

8-A

P71/SO2/TxD

5-A

P72/SCK2/ASCK

8-A

P100/TI5/TO5

8-A

P101/TI6/TO6

RESET

2

Input

–

AV

REF

–

–

Connect to V

SS

.

AV

DD

Connect to V

DD

.

AV

SS

Connect to V

SS

.

V

PP

 (

µ

PD78P083)

Connect directly to V

SS

.

NC (44-pin plastic QFP

Connect to V

SS

 (can also leave open)

version)

IC (Mask ROM version)

Connect directly to V

SS

.

Types of input/output circuits of the pins and recommeded connection of unused pins are shown in Table 2-1.

For the configuration of each type of input/output circuit, see Figure 2-1.