¡ Semiconductor

MSM7620

7/28

(3/5)

Receive serial data.

Input the m-law PCM signal synchronized to SYNC and SCK. Data is read in at the fall of SCK.

Pin

32-pin

SSOP

64-pin

QFP

Symbol

Type

Description

Clock pin for transmit/receive serial data. This pin uses the external

SCK or the SCKO.

Input the PCM CODEC transmit/receive clock (64 to 2048 kHz).

Sync signal for transmit/receive serial data. This pin uses the external

SYNC or SYNCO.

Input the PCM CODEC transmit/receive sync signal (8 kHz).

Transmit serial data.

This pin outputs the m-law PCM signal synchronized to SYNC and SCK.

This pin is in a high impedance state while there is no data output.

Receive serial data.

This pin outputs the m-law PCM signal synchronized to SYNC and SCK.

This pin is in a high impedance state while there is no data output.

Bidirectional bus for parallel data transfer between the Master Chip and

Slave Chip when used in a cascade connection.

The PD15 pin corresponds to MSB.

This pin is in a high impedance state while there is no data output. Data

is loaded in at the falling edge of

SFx.

Power-down mode control.

"L": Power-down mode

"H": Normal operation mode

During power-down, all input pins are disabled and output pins are in

the following sates :

High impedance : SOUT, ROUT, PD0 to 15

"L": SYNCO, SCKO

"H":

OF1, OF2

Holds the last state : WDT,

IRLD

Not affected: X2, MCKO

Reset after power-down is released.

Crystal oscilator.

Used to configure the oscillation circuit.

Refer to the internal clock generator circuit example.

When inputting the basic clock externally, insert a 5 pF capacitor with

excellent high frequency characteristics between X2 and GND.

External input for the basic clock or for the crystal oscillator.

Input the basic clock (18 MHz).

Refer to the internal clock generator circuit example.

RIN

I

10

11

11

12

SCK

I

12

13

SYNC

I

O

SOUT

13

14

O

14

15

ROUT

I/O

—

—

—

—

—

—

19

30

33

34

51

52

PD0

PD11

PD12

PD13

PD14

PD15

20

35

X1/CLKIN

I

21

36

X2

O

23

38

PWDWN

I