Pin
No.
Terminal
Name
I/O
Function
1
COM3
O
LCD segment signal output
2
COM2
O
LCD segment signal output
3
COM1
O
LCD segment signal output
4
COM0
O
LCD segment signal output
5
VLC3
-
LCD reference voltage input
terminal (Connected to DGND)
6
VLC2
I
LCD reference voltage input
terminal (1.1 V)
7
VLC1
I
LCD reference voltage input
terminal (2.2 V)
8
VDD
-
Power supply terminal (3.3 V)
9
OSC2
-
Not used, open
10
OSC1
I
Main system clock input (f=8
MHz)
11
VSS
-
DGND terminal
12
XI
I
Crystal oscillator terminal (f=
32.768 kHz)
13
XO
O
Crystal oscillator terminal (f=
32.768 kHz)
14 MMOD
I
Mode select terminal (Conncted
to DGND)
15 VREF-
I
Reference voltage input terminal
16
AN0
I
Switch detection terminal (STOP
/FOLDER/DIVIDE)
17
AN1
I
Switch detection terminal
(MODE, REC, ERASE)
18
KEY2
I
Switch detection terminal
(HOLD)
19
AN3
I
Battery voltage input
20
PA4
I
FIFO buffer FULL detection
signal input
21
PA5
I
CODEC (IC2) monitor terminal
22
PA6
I
FIFO buffer MID detection signal
input
23
PA7
I
FIFO buffer EMPTY detection
signal input
24 VREF+
I
Reference voltage input
terminal (Connected to 3.3 V)
25
P00
O
CODEC (IC2) clock select signal
output
26
P01
O
Memory enable signal output
27
P02
I
Memory busy/ ready signal input
28
P03
O
CODEC (IC2) chip enable signal
output
14
