UPD78F0034A NEC, UPD78F0034A Datasheet - Page 13

• Manufacturer Part Number: UPD78F0034A
• Description: 8 Bit Single Chip Microcontroller
• Manufacturer: NEC

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3.2 Non-Port Pins (2/2)
A8 to A15
RD
WR
WAIT
ASTB
ANI0 to ANI7 Input
ADTRG
AV
AV
AV
RESET
X1
X2
XT1
XT2
V
V
V
V
V
Pin Name
DD0
SS0
DD1
SS1
PP
REF
DD
SS
Output
Output
Output
Input
Input
Input
Input
Input
Input
I/O
–
–
–
–
–
–
–
–
–
Higher address bus for extending memory externally.
Strobe signal output for read operation of external memory.
Strobe signal output for write operation of external memory.
Inserting wait for accessing external memory.
Strobe output which externally latches address information output to
ports 4 and 5 to access external memory.
A/D converter analog input.
A/D converter trigger signal input.
A/D converter reference voltage input.
A/D converter analog power supply.
Set the voltage equal to V
A/D converter ground potential.
Set the voltage equal to V
System reset input.
Connecting crystal resonator for main system clock oscillation.
Connecting crystal resonator for subsystem clock oscillation.
Positive power supply voltage for ports.
Ground potential of ports.
Positive power supply (except ports).
Ground potential (except ports).
Applying high-voltage for program write/verify. Connect directly to V
or V
SS1
in normal operation mode.
DD0
SS0
Data Sheet U14040EJ4V0DS
or V
or V
Function
SS1
DD1
.
.
µ PD78F0034A, 78F0034AY
SS0
After Reset
Input
Input
Input
Input
Input
Input
–
–
–
–
–
–
–
–
–
–
–
–
–
P50 to P57
P64
P65
P66
P67
P10 to P17
P03/INTP3
Alternate
Function
–
–
–
–
–
–
–
–
–
–
–
–
–
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