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1.4
Pin Functions
Table 1.2
Pin Functions
Type
Symbol
Power
V
CC
source pins
V
SS
AV
CC
V
CL
Clock pins
OSC1
OSC2
X1
X2
RES
System
control
TEST
Pin No.
FP-64E
FP-64A
DP-42S
12
14
9
11
3
5
6
8
11
13
10
12
5
7
4
6
7
9
8
10
I/O
Name and Functions
Input
Power supply: All V
be connected to the user system
V
.
CC
Input
Ground: All V
connected to the user system GND
(0 V).
Input
Analog power supply: This is the
power supply pin for the A/D
converter. When the A/D converter
is not used, connect this pin to the
user system V
Input
Internal step-down power supply:
Connect a capacitor of around
0.1 µF between this pin and the V
pin for stabilization.
Input
System clock: These pins connect
to a crystal or ceramic oscillator, or
can be used to input an external
clock.
See section 5, Clock Pulse
Output
Generators, for a typical connection
diagram.
Input
Subclock: These pins connect to a
32.768-kHz crystal oscillator.
See section 5, Clock Pulse
Output
Generators, for a typical connection
diagram.
Input
Reset: When this pin is driven low,
the chip is reset.
Input
Test: This is a test pin, not for use
in application systems. It should be
connected to V
pins should
CC
pins should be
SS
.
CC
SS
.
SS
7
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