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

номер детали AT80SND1C-ROTIL
подробное описание детали  Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
PDF  210 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT80SND1C-ROTIL датащи(HTML) 155 Page - ATMEL Corporation

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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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