AT80SND1C-ROTIL datasheet(155/210 Pages) ATMEL

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AT80SND1C-ROTIL Datasheet(PDF) 155 Page - ATMEL Corporation

Part #	AT80SND1C-ROTIL

Description	Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface

PDF	210 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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155 / 210 page

155

AT8xC51SND1C

4109E–8051–06/03

Slave Mode with Interrupt

Policy

Figure 120 shows the initialization phase and the transfer phase flows using the

interrupt.

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.

Figure 122. Slave SPI Interrupt Policy Flows

SPI Initialization

Interrupt Policy

Enable interrupt

ESPI =1

SPI Interrupt

Service Routine

Select Slave Mode

MSTR = 0

Select Format

program CPOL & CPHA

Enable SPI

SPEN = 1

Get Status

Read SPSTA

Prepare New Transfer

write data in SPDAT

Get Data Received

read SPDAT

Prepare Transfer

write data in SPDAT

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