NEC PD78058FY(A) - 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