DSP56F803 datasheet(19/57 Pages) FREESCALE

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56F803 Technical Data, Rev. 16

Freescale Semiconductor

2.7 Serial Peripheral Interface (SPI) Signals

Table 2-11 Serial Peripheral Interface (SPI) Signals

No. of

Pins

Signal

Name

Signal

Type

State During

Reset

Signal Description

MISO

GPIOE6

Input/Out

put

Input/Out

put

Input

SPI Master In/Slave Out (MISO)—This serial data pin is an input to a

master device and an output from a slave device. The MISO line of a

slave device is placed in the high impedance state if the slave device

is not selected.

Port E GPIO—This General Purpose I/O (GPIO) pin can be

individually programmed as an input or output pin.

After reset, the default state is MISO.

MOSI

GPIOE5

Input/Out

put

Input/Out

put

Input

SPI Master Out/Slave In (MOSI)—This serial data pin is an output

from a master device and an input to a slave device. The master

device places data on the MOSI line a half-cycle before the clock

edge that the slave device uses to latch the data.

Port E GPIO—This General Purpose I/O (GPIO) pin can be

individually programmed as an input or output pin.

After reset, the default state is MOSI.

SCLK

GPIOE4

Input/Out

put

Input/Out

put

Input

SPI Serial Clock—In master mode, this pin serves as an output,

clocking slaved listeners. In slave mode, this pin serves as the data

clock input.

Port E GPIO—This General Purpose I/O (GPIO) pin can be

individually programmed as an input or output pin.

After reset, the default state is SCLK.

GPIOE7

Input

Input/Out

put

Input

SPI Slave Select—In master mode, this pin is used to arbitrate

multiple masters. In slave mode, this pin is used to select the slave.

Port E GPIO—This General Purpose I/O (GPIO) pin can be

individually programmed as an input or output pin.

After reset, the default state is SS.

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