NEC PD78058FY(A) User Manual
Page 63
63
CHAPTER 3 PIN FUNCTION (
µ
PD78058F SUBSERIES)
(2) Non-port pins (2/2)
Pin Name
Input/Output
Function
After Reset Alternate Function
AD0 to AD7
Input/Output
Low-order address/data bus when expanding external memory
Input
P40 to P47
A8 to A15
Output
High-order address bus when expanding external memory
Input
P50 to P57
RD
Strobe signal output for read operation from external memory
P64
WR
Strobe signal output for write operation to external memory
P65
WAIT
Input
Wait insertion when accessing external memory
Input
P66
Strobe output externally latching address information output to ports 4,
5 to access external memory
ANI0 to ANI7
Input
A/D converter analog input
Input
P10 to P17
ANO0, ANO1
Output
D/A converter analog output
Input
P130, P131
AV
REF0
Input
A/D converter reference voltage input
—
—
AV
REF1
Input
D/A converter reference voltage input
—
—
AV
DD
—
A/D converter analog power supply. (Common with the port power supply)
—
—
AV
SS
—
Ground potential (common with the port’s ground potential) of the A/D
—
—
converter and D/A converter.
RESET
Input
System reset input
—
—
X1
Input
Crystal connection for main system clock oscillation
—
—
X2
—
—
—
XT1
Input
Crystal connection for subsystem clock osicllation
Input
P07
XT2
—
—
—
V
DD
—
Positive power supply (Except the port)
—
—
V
PP
—
High-voltage application for program write/verify.
—
—
Connect directly to V
SS
in the normal operation mode.
V
SS
—
Ground potential (Except the port)
—
—
IC
—
Internally connected. Connect directly to V
SS
.
—
—
Cautions 1. The AV
DD
pin is used in common as the power supply for the A/D converter and port. If
this device is used in application fields where reduction of noise generated internally in
the microprocessor is required, please connect to a separate power supply with the same
electrical potential as V
DD
.
2. The AV
SS
pin is used as the ground potential for the A/D converter and D/A converter,
and also as the ground potential for the ports. If this device is used in application fields
where reduction of noise generated internally in the microprocessor is required, please
connect it to a ground line which is separate from V
SS
.
Output
Input
ASTB
Output
Input
P67