SC72131

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:2.0

2004.08.03

Http: www.silan.com.cn

Page 5 of 11

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Pin NO.

SDIP-22

SOP-20

Pin Name

Description

14

NC

--

15

13

AMIN

16

14

FMIN

• These pins input AM and FM band local oscillator signals by

capacitor coupling.

•These pins feature built-in amps.

17

15

•power supply pin (Applies 5.0V±10%)

18

16

DO

•This pin is for phase comparator tristate output.

19

17

LFIN

20

18

LFOUT

•These pins for low-pass filter input pin and output pin.

21

19

GND

•The SC72131 ground.

FUNCTION DESCRIPTION

Serial Data I/O Methods

The SC72131 inputs and outputs data using the 4 serial bus lines, the serial data I/O methods are selected by

an 8bit address

Register assignments

Address = 82H(IN)

Address = 92H(IN)

IO

C1

IO

C2

1

IO

2

IO

OT1

OT2

OT3

OT4

*

DO

C0

DO

C1

DO

C2

UL

0

UL

1

DZ

0

DZ

1

G0 G1 TO

D

O

C

IF

S

T0

T1

T2

Address = A2H (OUT)

I1

I2

*

UL

IF1

9

IF1

8

IF1

7

IF1

6

IF1

5

IF1

4

IF1

3

IF1

2

IF1

1

IF1

0

IF9 IF8 IF7 IF6 IF5 IF4 IF3 IF2 IF1 IF0

Programmable divider structure

Swallow counter and programmable counter circuit configuration