ST75951 datasheet(9/21 Pages) STMICROELECTRONICS

Part #	ST75951

Description	V.34/56K ANALOG FRONT END

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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9 / 21 page

f

Q

8

XTALIN

SCLK

FS

DIN

DOUT

MCM

M/S

TS

f

S = fQ / Over

P

R

O

C

E

S

O

R

V

DD

GND

STLC7546

Functional Mode

2

3

46

47

14

4

44

Figure 8

f

Q = 36.864MHz

18.432MHz

9.216MHz

8

XTALIN

SCLK

FS

DIN

DOUT

MCM

M/S

TS

f

S = fQ / (M x Q x Over)

P

R

O

C

E

S

O

R

V

DD

GND

2

3

46

47

14

4

44

Figure 7

FUNCTIONAL DESCRIPTION (continued)

f

Q

8

XTALIN

SCLK

FS

DIN

DOUT

MCM

M/S

TS

f

S = fQ / Over

P

R

O

C

E

S

O

R

GND

2

3

46

47

14

4

44

Figure 9

f

Q = 36.864MHz

18.432MHz

9.216MHz

8

XTALIN

2 SCLK

3 FS

46 DIN

47 DOUT

14

4

44

M/S

TS

f

S = fQ / (M x Q x Over)

P

R

O

C

E

S

O

R

V

DD

V

DD

GND

MCM

Figure 6

8 XTALIN

SCLK

FS

DIN

DOUT

P

R

O

C

E

S

O

R

Master

Codec 1

RESET

FS

DIN

DOUT

Slave

Codec 2

MCM

M/S

TS

GND

V

DD

43

RESET

43

MCM

M/S

TS

GND

V

DD

2

3

46

47

14

4

44

14

4

44

3

46

47

8 XTALIN

SCLK

2

Figure 10

6 - General Purpose Input / Output

ST75951 features 4 GPIO. The GPIO0..3 are tradi-

tional inputs/outputs programmed and set thanks to

the control register 1 (mask, input/output) and control

register 2 (output value, static or modulated).

GPIO0 output is dedicated to output F0/N clocks

instead of a static ’1’ if bit 6 in control register 2 is

set. GPIO3 is dedicated to output F0 clock instead

of a static ’1’ if bit 10 in control register 2 is set (see

Figure 11 and 12).

ST75951

9/21

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