Table of Contents
Advertisement
(2) Pins other than port pins (2/2)
Pin Name
Input/Output
AD0 to AD7
Low-order address/data bus when expanding external memory
Input/Output
A8 to A15
Output
High-order address bus when expanding external memory
Output
RD
Strobe signal output for read operation from external memory
WR
Strobe signal output for write operation to external memory
WAIT
Input
Wait insertion when accessing external memory
ASTB
Output
Strobe output externally latching address information output to ports 4,
5 to access external memory
ANI0 to ANI7
Input
A/D converter analog input
ANO0, ANO1 Output
D/A converter analog output
AV
Input
A/D converter reference voltage input
REF0
AV
Input
D/A converter reference voltage input
REF1
AV
—
A/D converter analog power supply. Connect to V
DD
AV
—
A/D and D/A converter ground potential. Connect to V
SS
RESET
Input
System reset input
X1
Input
Crystal connection for main system clock oscillation
X2
—
XT1
Input
Crystal connection for subsystem clock oscillation
XT2
—
V
—
Positive power supply
DD
High-voltage application for program write/verify. Directly connect to
V
—
PP
V
in normal operating mode.
SS
V
—
Ground potential
SS
IC
—
Internally connected. Connect directly to V
4.1.2 PROM programming mode pins (PROM versions only)
Pin Name
Input/Output
PROM programming mode setting.
RESET
Input
When +5 V or +12.5 V is applied to the V
the PROM programming mode is set.
V
Input
High-voltage application for PROM programming mode setting and program write/verify.
PP
A0 to A16
Input
Address bus
D0 to D7
Input/output Data bus
CE
Input
PROM enable input/program pulse input
OE
Input
Read strobe input to PROM
PGM
Input
Program/program inhibit input in PROM programming mode
V
—
Positive power supply
DD
V
—
Ground potential
SS
CHAPTER 4 PIN FUNCTION ( PD78054Y Subseries)
Function
Function
.
DD
.
SS
.
SS
pin or a low level voltage is applied to the RESET pin,
PP
After Reset Alternate Function
Input
P40 to P47
Input
P50 to P57
Input
P64
P65
Input
P66
Input
P67
Input
P10 to P17
Input
P130, P131
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Input
P07
—
—
—
—
—
—
—
—
—
—
79
Hide quick links:
Advertisement
Table of Contents
