DSP56307SLASHD datasheet(32/156 Pages) NXP

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DSP56307 Technical Data

MOTOROLA

Signals/Connections

SCI

Table 1-13

Serial Communication Interface

Signal Name

Type

State During

Reset

Signal Description

RXD

PE0

Input

Input or

Output

Input

Serial Receive Data

ÑThis input receives byte

oriented serial data and transfers it to the SCI

receive shift register.

Port E 0

ÑThe default configuration following

reset is GPIO input PE0. When configured as

PE0, signal direction is controlled through the

SCI port directions register (PRR). The signal

can be configured as an SCI signal RXD through

the SCI port control register (PCR).

Note:

This signal has a weak keeper to maintain the last

state even if all drivers are tri-stated.

TXD

PE1

Output

Input or

Output

Input

Serial Transmit Data

ÑThis signal transmits

data from SCI transmit data register.

Port E 1

ÑThe default configuration following

reset is GPIO input PE1. When configured as

PE1, signal direction is controlled through the

SCI PRR. The signal can be configured as an SCI

signal TXD through the SCI PCR.

Note:

This signal has a weak keeper to maintain the last

state even if all drivers are tri-stated.

SCLK

PE2

Input/

Output

Input or

Output

Input

Serial Clock

ÑThis is the bidirectional

Schmitt-trigger input signal providing the input

or output clock used by the transmitter and/or

the receiver.

Port E 2

ÑThe default configuration following

reset is GPIO input PE2. When configured as

PE2, signal direction is controlled through the

SCI PRR. The signal can be configured as an SCI

signal SCLK through the SCI PCR.

Note:

This signal has a weak keeper to maintain the last

state even if all drivers are tri-stated.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

Not Recommended for New Design

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