PIN LIST

Pin Number

Name

Type

Description

2

SCLK

O

Bit Shift Clock Output , SCLK = Coeff

⋅ FS

3

FS

I/O

Frame Synchronization Input (Slave)/Output (Master)

4

MCM

I

Master Clock Mode

I

Positive Digital Power Supply

6

DGND

I

Digital Ground (0V) (see Note1)

7

XTALOUT

O

Crystal Output

8

XTALIN

I

Crystal Input

9

HC1

I

Hardware Control Input

10

HC0

I

Hardware Control Input

11

PWRDWN

I

Power Down Input

14

M/S

I

Master/slave Control Input

15

RING

O

Ring Detect Output

16

GPI

O

General Purpose Interrupt Output

17

GPIO3

I/O

General Purpose Control Input/Output

18

GPIO2

I/O

General Purpose Control Input/Output

19

GPIO1

I/O

General Purpose Control Input/ Output

20

GPIO0

I/O

General Purpose Control Input/Output

21

O

Positive Reference Voltage

22

O

Negative Reference Voltage

23

AGND1

I

Analog Ground (0V) (see Note1)

26

D6

O

ST952 Control Output

27

D5

O

ST952 Control Output

28

TSTA1

O

Reserved for test

29

I

Common Mode Voltage Input P

30

D4

I

Receive Input

31

D3

I

Receive Input

32

I

Common Mode Voltage Input S

33

TSTA2

O

Reserved for test

34

D2

O

Transmit Output

35

D1

O

Transmit Output

38

AGND2

I

Analog Ground (0V) (see Note1)

39

O

Common Mode Voltage Output

40

I

Positive Analog Power Supply

41

AUXIN

I

Receive Auxiliary Analog Input Amplifier

42

HM

I

Hardware Control Input for Clid/Off-hook

43

RESET

I

Reset Function to initialize the device

44

TS

I

Timeslot Control Input

45

TSTD1

I

Reserved for Test (must be grounded in normal mode)

46

DIN

I

Serial Data Input

47

DOUT

O

Serial Data Output

Note 1 : Digital and Analog ground must be connected externally together.

ST75951

3/21