µPD75048
(cont'd)
Pin Name Input/Output Also Served
As
Function
When Reset
AN0-AN3
AN4-AN7
AVREF+
AVREF-
AVDD
AVSS
Input
Input
Input
—
—
X1, X2
Input
XT1, XT2 Input
RESET
IC
VDD
VSS
Input
—
—
—
—
8-bit analog input
—
Reference voltage input
—
Pins only for A/D
(AVDD side)
converter
—
Reference voltage input
(AVSS side)
—
Positive power supply
—
GND
A crystal/ceramic resonator for the main
system clock is connected across these pins.
—
When using the external clock, the X1 pin
inputs the external clock, and the X2 pin
inputs the reverse phase of the external clock
signal.
A crystal resonator for the subsystem clock is
connected across these pins. When using the
—
external clock, the XT1 pin inputs the external
clock, and the XT2 pin inputs the reverse
phase of the external clock signal. The XT1 pin
can be used as a 1-bit input(test) pin.
—
System reset input
—
Internally Connected. Should be connected directly
to VDD.
—
Positive power supply
—
GND
*1: Circles indicate Schmitt trigger inputs.
Input
—
—
—
—
—
—
—
—
—
—
Input/
Output
Circuit
TYPE*1
Y-A
Y
Z-A
Z-A
—
—
—
—
B
—
—
—
12