DSP56857 datasheet(566/662 Pages) FREESCALE

566 / 662 page

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Date:

Programmer:

Sheet

5685X Digital Signal Controller User Manual, Rev. 4

B-64

Freescale Semiconductor

3 of 6

SPI

SPI Status and Control Register (SPSCR) continued

Bits

Name

Description

OVRF

Overflow

This read-only flag is set if software does not read the data in the Receive Data Register before

the next full data enters the Shift Register.

No overflow

Overflow

1MODF

Mode Fault

This read-only flag is set in a slave SPI if the SS pin goes high during a transmission with the

MODFEN bit set.

SS pin at appropriate logic level

SS pin at inappropriate logic level

SPTE

SPI Transmitter Empty

This read-only flag is set each time the Transmit Data Register transfers a full data length into the

Shift Register.

Transmit Data Register not empty

Transmit Data Register empty

SPI Status and

Control Register

(SPSCR)

$1FFFE8

Bits

15 14 13

Read

SPR

DSO ERRIE MODFEN SPRIE SPMSTR CPOL CPHA SPE SPTIE

SPRF OVRF MODF SPTE

Write

Reset

1000

001

denotes Reserved Bits

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