LC72323-XXXX
Continued from preceding page.
Pin
Name
64
COM2
65
COM1
I/O Allocation
O
COM2
O
COM1
66
/INT
I
/TELIN
67
/HOLD
I
/HOLD
68
/RES
69
ADI
70
HCTR
71
LCTR
72
/SNS
73
VDD
74
FMIN
75
AMIN
76
VSS
77
EO1
78
EO2
79
TEST1
80
XOUT
I
/RES
I
ADI
I
FMIF
I
AMIF
I
/SNS
I
VDD
I
FM OSC
I
AM OSC
I
VSS
O
EO1
O
EO2
I
TEST1
O
XOUT
Active
H
H
L
L
L
—
—
—
L
—
—
—
—
—
—
—
—
Function
Handling when unused
LCD common output
Open
When this pin is set low, “TEL” is displayed and the /AMUTE pin is set
low. When PRIORITY is 0, “TEL” is displayed for 5 seconds and then
the display returns to the clock display.
Used for detecting the power on/off state.
When /HOLD goes low
• If the clock function is enabled:
The clock count function operates without stopping the oscillator.
• If the clock function is disabled:
The oscillator is stopped and the chip goes to the power save mode.
Connect to VDD.
Connect to the S METER pin. (max = 3.2 V)
Inputs the FM IF signal.
Inputs the AM IF signal.
Used for power supply detection.
Connect to +5 V.
FM local oscillator input
AM local oscillator input
Connect to ground.
Phase comparator output
Phase comparator output
Connect to ground.
Connection for the 4.5 MHz crystal
Connect directly to
VDD.
—
—
Connect directly to
ground.
Connect directly to
ground.
Connect directly to
ground.
Connect directly to
VDD.
Connect directly to
VDD.
Connect directly to
ground.
Connect directly to
ground.
—
Open
Open
Connect directly to
ground.
—
No. 4934-9/27