Silan

Semiconductors

SC3610

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

5

PAD DESCRIPTION

Pad

No.

Symbol

I/O

Description

1

VDD

--

Supply voltage

2 ~ 4

COM1 ~ COM3

OL

LCD common drive signal for driving LCD display

5 ~ 17

SEG0 ~ SEG12

OL

LCD segment drive signal for driving LCD display

18

OSCI

I

32.768 kHz crystal oscillator input pin

19

OSCO

O

32.768 kHz crystal oscillator output pin

20

O

LCD Supply voltage. Connects a 0.1

µF capacitor between this pin and

21

RST

ISU

Active low power-on reset with pull-up resistor of approx.750k

Ω

22

TESTCLK

ISD

For testing use only with internal pull-down

23

TEST

ISD

When high, the chip will enter test mode

24

AL-ON/OFF

ISU

Alarm function on or off in toggle mode. Internal pull up input

25

AL-DISP

ISU

When pressed, will display the alarm time. Internal pull up input

26

MIN-SET

ISU

Minute setting for time and alarm(together with AL-DISP). Internal pull

up.

27

HR-SET

ISU

Hour setting for time and alarm(together with AL-DISP). Internal pull up.

28

NC

--

No connection

29

CLKFREQ-SEL

ISD

Clock or frequency display mode. Internal pull-down input. When low,

clock will be displayed. When high, radio frequency will be displayed.

30

--

Ground pin

31

AL-SIG

OD10

Open drain alarm signal output, active low.

32

AL-OUT

O4

Alarm output at 1kHz with 0.2 sec on and 0.2 sec off, push-pull output.

33

IF70k

ISD

Select IF offset in FM mode. H:70kHz, L:10.7kHz

34

NC

--

No connection

35

RANGE

ISU

For frequency counting mode only, Range = H or L, gate time = 0.1S

36

AM/FM-SEL

ISU

AM/FM mode selection. High for AM and low for FM, internal pull-up.

37

--

Analog Supply voltage

38

--

AM signal input, 0.3V peak to peak, 500kHz to 30MHz.

39

--

Analog Ground pin.

40

--

FM signal input, 0.3V peak to peak, 11-150MHz.

Note:

I

Oscillator Input Pad

O

Oscillator Output Pad

ISU

Schmitt trigger input pad with pull-up

OD10

Open Drain with 10mA output driving

ISD

Schmitt trigger input pad with pull-down

O4

Push-pull output pad with 4mA driving

OL

LCD segment and common output pad