Prom Programming Mode Pins ( Pd78P083 Only) - NEC PD78081(A) User Manual

(2) Pins other than port pins
Pin Name Input/Output
INTP1 Input
INTP2
INTP3
SI2 Input
SO2 Output
SCK2 Input/output
RxD Input
TxD Output
ASCK Input
TI5 Input
TI6
TO5 Output
TO6
PCL Output
BUZ Output
ANI0-ANI7 Input
AV Input
REF
AV –
DD
AV –
SS
RESET Input
X1 Input
X2 –
V –
DD
V –
PP
V –
SS
IC –
NC –

2.1.2 PROM programming mode pins ( PD78P083 only)

Pin Name Input/Output
RESET Input
V Input
PP
A0 to A14 Input
D0 to D7 Input/output
CE Input
OE Input
PGM Input
V —
DD
V —
SS
16
CHAPTER 2 PIN FUNCTION
Function
External interrupt request input by which the active edge
(rising edge, falling edge, or both rising and falling edges)
can be specified.
Serial interface serial data input.
Serial interface serial data output.
Serial interface serial clock input/output.
Asynchronous serial interface serial data input.
Asynchronous serial interface serial data output.
Asynchronous serial interface serial clock input.
External count clock input to 8-bit timer (TM5).
External count clock input to 8-bit timer (TM6).
8-bit timer output. (also used for 8-bit PWM output)
Clock output. (for main system clock trimming)
Buzzer output.
A/D converter analog input.
A/D converter reference voltage input.
A/D converter analog power supply. Connected to V
A/D converter ground potential. Connected to V
System reset input.
Main system clock oscillation crystal connection.
Positive power supply.
High-voltage applied during program write/verification.
Connected directly to V in normal operating mode.
SS
Ground potential.
Internal connection. Connect directly to V
Does not internally connected. Connect to V
(It can be left open)
PROM programming mode setting.
When +5 V or +12.5 V is applied to the V
RESET pin, the PROM programming mode is set.
High-voltage application for PROM programming mode setting and program write/verify.
Address bus
Data bus
PROM enable input/program pulse input
Read strobe input to PROM
Program/program inhibit input in PROM programming mode
Positive power supply
Ground potential
After Reset
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
–
. –
DD
. –
SS
–
–
–
–
–
–
. –
SS
. –
SS
Function
pin or a low level voltage is applied to the
PP
Alternate Function
P01
P02
P03
P70/RxD
P71/TxD
P72/ASCK
P70/SI2
P71/SO2
P72/SCK2
P100/TO5
P101/TO6
P100/TI5
P101/TI6
P35
P36
P10-P17
–
–
–
–
–
–
–
–
–
–
–