AT89C5132-ROTUL datasheet(128/181 Pages) ATMEL

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AT89C5132-ROTUL 데이터시트(PDF) 128 Page - ATMEL Corporation

부품명	AT89C5132-ROTUL

상세설명	USB Microcontroller with 64K Bytes Flash Memory

PDF	181 Pages

Scroll/Zoom	100%

제조업체	ATMEL [ATMEL Corporation]

홈페이지	http://www.atmel.com

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128 / 181 page

128

4173D–USB–02/06

AT89C5132

Figure 19-11. Slave SPI Polling Policy Flows

19.3.7

Slave Mode with Interrupt Policy

Figure 19-10 shows the initialization phase and the transfer phase flows using the interrupt

policy.

The transfer format depends on the master controller.

Reading SPSTA at the beginning of the ISR is mandatory for clearing the SPIF flag. Clear is

effective when reading SPDAT.

SPI Initialization

Polling Policy

Disable interrupt

SPIE = 0

SPI Transfer

Polling Policy

Data Received?

SPIF = 1?

Select Slave Mode

MSTR = 0

Select Format

Program CPOL & CPHA

Enable SPI

SPEN = 1

Prepare Next Transfer

Write Data in SPDAT

Get Data Received

Read SPDAT

Prepare Transfer

write data in SPDAT

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