M68ICS08GR datasheet(300/408 Pages) FREESCALE

tên linh kiện	M68ICS08GR

Giải thích chi tiết về linh kiện	M68HC08 Microcontrollers

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Serial Peripheral Interface (SPI)

Technical Data

MC68HC908GR8 — Rev 4.0

300

Serial Peripheral Interface (SPI)

MOTOROLA

Figure 20-2. SPI Module Block Diagram

The SPI module allows full-duplex, synchronous, serial communication

between the MCU and peripheral devices, including other MCUs.

Software can poll the SPI status flags or SPI operation can be interrupt-

driven.

If a port bit is configured for input, then an internal pullup device may be

enabled for that port bit. See Port D Input Pullup Enable Register.

TRANSMITTER CPU INTERRUPT REQUEST

RESERVED

RECEIVER/ERROR CPU INTERRUPT REQUEST

76543210

SPR1

SPMSTR

TRANSMIT DATA REGISTER

SHIFT REGISTER

SPR0

CGMOUT

÷ 2

CLOCK

SELECT

÷ 2

CLOCK

DIVIDER

÷ 8

÷ 32

÷ 128

CLOCK

LOGIC

CPHA

CPOL

SPI

SPRIE

DMAS

SPE

SPWOM

SPRF

SPTE

OVRF

RESERVED

CONTROL

LOGIC

RECEIVE DATA REGISTER

SPTIE

SPE

INTERNAL BUS

FROM SIM

MODFEN

ERRIE

CONTROL

MODF

SPMSTR

MOSI

MISO

SPSCK

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