UPD78320 Datasheet, PDF (14/88 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78320, 78322
1.2 NON- PORT PINS (2/2)
Pin Name
I/O
EA
Input
AN0 to AN7
AVREF
AVDD
AVSS
RESET
X1
X2
VDD
VSS
NC
Input
Input
—
—
Input
Input
—
––
—
—
Function
Dual-
Function Pin
In the µPD78322, EA pin is normally connected to VDD. Connecting EA pin to VSS sets the
ROM-less mode and accesses the external memory. In the µPD78320, 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 VSS (GND) (can also be left open).
—
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