NEC uPD78P078 User Manual
Page 79
79
CHAPTER 3 PIN FUNCTION (
µ
PD78078 SUBSERIES)
Table 3-1. 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
PD78P078)
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
PD78P078)
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
PD78P078)