NEC uPD78056 User Manual
88
CHAPTER 4 PIN FUNCTION (
µ
PD78054Y Subseries)
5-A
Table 4-1. Pin Input/Output Circuit Types (2/2)
Input/Output
Circuit Type
P60 to P63 (Mask ROM version)
13-B
Input/output
Individually connect to V
DD
via a resistor.
P60 to P63 (PROM version)
13-D
P64/RD
Input/output
Individually connect to V
DD
or V
SS
via a resistor.
P65/WR
P66/WAIT
P67/ASTB
P70/SI2/RxD
8-A
P71/SO2/TxD
5-A
P72/SCK2/ASCK
8-A
P120/RTP0 to P127/RTP7
5-A
P130/ANO0 to P131/ANO1
12-A
Input/output
Individually connect to V
SS
via a resistor.
RESET
2
Input
—
XT2
16
—
Leave 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)
Directly connect to V
SS
.
V
PP
(PROM version)
Pin Name
Input/Output
Recommended Connection of Unused Pins