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Pin No.
Pin Name
41
HOLD
42
E-PROM1
43
E-PROM2
44
BATT IND
45
POWER SW
46
ALARM OUT
47
MUTE
48
TEST
49
INH
50
IF IN
51
DO1
52
DO2
53
GND
54
FM IN
55
AM IN
56
VDD
57
RESET
58
X OUT
59
X IN
60
V XT
61
V LCD
62
C1
63
C2
64
VEE
I/O
I
L INPUT, KEYS HOLD.
I/O
E-PROM INTERFACE.
O
E-PROM INTERFACE.
I
A/D INPUT FOR BATTRY INDICATOR. (Connected to VDD)
I
H INPUT, RADIO ON.
O
ALARM1,ALARM2 OUTPUT.
O
WHEN MUTE ON, H OUTPUT.
I
TEST PIN. (Not connected)
I
L INPUT RADIO OFF.
I
IF SIGNAL INPUT.
O
PLL OUTPUT. (Connected to VDD)
O
PLL OUTPUT.
—
GND.
I
FM OSC SIGNAL INPUT.
I
AM OSC SIGNAL INPUT.
—
Power Supply Pin.
I
Input pin for system reset signals. (Pull up)
O
Crystal oscillator output pin.
I
Crystal oscillator input pin.
I
Power supply for the crystal oscillator. (Pull down)
I
O
Voltage doubler boosting pin for driving the LCD.
O
—
1.5V constant voltage supply pin for driving the LCD. (Pull down)
17
Description
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