UPD78323 NEC, UPD78323 Datasheet - Page 13

• Manufacturer Part Number: UPD78323
• Description: 16/8-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

1.2
AN0 to AN7
Pin Name
RESET
AV
AV
AV
V
V
NC
PINS OTHER THAN PORTS (2/2)
EA
X1
X2
DD
SS
REF
DD
SS
Input
Input
Input
Input
Input
I/O
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In the PD78324, EA pin is normally connected to V
the ROM-less mode and accesses the external memory. In the PD78323, this pin should
be fixed to “0” (low level). The EA pin level cannot be changed during operation.
A/D converter analog input.
A/D converter reference voltage input.
A/D converter analog power supply
A/D converter GND
System reset input
Crystal connect pin for sysem clock oscillation. When an external clock is supplied,
the clock is input to X1 and the inverted clock is input to X2. (X2 can also be left
open.)
Positive power supply
GND pin
Not internally connected. Connected to V
Function
SS
(GND) (can also be left open).
DD
. Connecting EA pin to V
PD78323, 78324
SS
sets
Function Pin
Dual-
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