DSP56600FMSLASHAD datasheet(38/76 Pages) NXP

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Preliminary

1-32

DSP56652 Technical Data Sheet

MOTOROLA

Pin and Signal Descriptions

DSP56652 Signal Description

Baseband Codec Port

After reset, the default state of the baseband codec port pins is Hi-Z. For baseband

codec port signals equipped with resistors, all pull-ups and pull-downs are

automatically disconnected when the pin is an output.

SC2A

Input or

Output

Input

Audio codec serial clock 2Ñ

This signalÕs function is determined by

the SCLK mode.

Synchronous modeÑtransmitter and receiver frame sync I/O

Asynchronous modeÑtransmitter frame sync I/O

It is equipped with a 100k

W pull-down resistor.

This is a GPIO signal when SC2A is not being used.

Note:

This signal is disabled if the alternate SC2A function on

ROW6 is selected. (See Table 1-14 on page 1-22.)

Table 1-19

Baseband Codec Port Signals

Signal Name

Signal

Type

State

during

Reset

Signal Description

STDB

Output

Input or

Output

Input

Baseband codec transmit data

Ñ This output signal transmits serial

data from the baseband codec serial transmitter shift register. This

signal is equipped with a 100 pull-up resistor.

This is a GPIO signal when STDB is not being used.

SRDB

Input

Input or

Output

Input

Baseband codec receive data

Ñ This input signal receives serial

data and transfers the data to the baseband codec receive shift

W pull-down resistor.

This is a GPIO signal when SRDB is not being used.

SCKB

Input or

Output

Input

Baseband codec serial clock

Ñ This bidirectional signal provides

the serial bit rate clock when only one clock is being used or the TxD

clock otherwise. This signal is equipped with a 100k

W pull-down

resistor. This is a GPIO signal when the serial baseband codec port

is not being used.

Table 1-18

Serial Audio Codec Port Signals (Continued)

Signal Name

Signal

Type

State

during

Reset

Signal Description

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

DSP56600FM/AD Datasheet(PDF) 38 Page - NXP Semiconductors

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