DSP56362AD datasheet(28/168 Pages) MOTOROLA

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DSP56362 Advance Information

MOTOROLA

Signal/Connection Descriptions

Serial Host Interface

MOSI

HA0

Input or

output

Input

Tri-stated

SPI Master-Out-Slave-In—When the SPI is

configured as a master, MOSI is the master data

output line. The MOSI signal is used in conjunction

with the MISO signal for transmitting and receiving

serial data. MOSI is the slave data input line when

the SPI is configured as a slave. This signal is a

Schmitt-trigger input when configured for the SPI

Slave mode.

I2C Slave Address 0—This signal uses a Schmitt-

trigger input when configured for the I2C mode.

When configured for I2C slave mode, the HA0

signal is used to form the slave device address.

HA0 is ignored when configured for the I2C master

mode.

This signal is tri-stated during hardware, software,

and individual reset. Thus, there is no need for an

external pull-up in this state.

This input is 5 V tolerant.

HA2

Input

Tri-stated

SPI Slave Select—This signal is an active low

Schmitt-trigger input when configured for the SPI

mode. When configured for the SPI Slave mode,

this signal is used to enable the SPI slave for

transfer. When configured for the SPI master mode,

this signal should be kept deasserted (pulled high).

If it is asserted while configured as SPI master, a

bus error condition is flagged. If SS is deasserted,

the SHI ignores SCK clocks and keeps the MISO

output signal in the high-impedance state.

I2C Slave Address 2—This signal uses a Schmitt-

trigger input when configured for the I2C mode.

When configured for the I2C Slave mode, the HA2

signal is used to form the slave device address.

HA2 is ignored in the I2C master mode.

This signal is tri-stated during hardware, software,

and individual reset. Thus, there is no need for an

external pull-up in this state.

This input is 5 V tolerant.

Table 1-10 Serial Host Interface 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

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