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AT90SCR100 데이터시트(PDF) 283 Page - ATMEL Corporation

부품명 AT90SCR100
상세설명  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 데이터시트(HTML) 283 Page - ATMEL Corporation

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TPR0327AY–SMS–30Jan09
AT90SCR100
Figure 21-6.
SPI - Slave with DPRAM operation - First part
Configure SPICK frequency
(HSSPICFG)
Use the timeout?
Configure HSSPITIMEOUT
Configure CPOL, CPHA, MSTR=0,
SPIEN, DPRAM=1, BTDIE
Wait SPICKRDY (HSSPISR)
GOTO LABEL
"RECEIVE DATA"
nb_data to send or
receive>16?
TXBUFE?
(HSSPISR)
Data to receive?
Wait BTD (HSSPIIR)
Clear BTD (HSSPIIR)
YES
YES
YES
NO
NO
NO
Data to send?
YES
NO
YES
NO
Init RAM data and HSSPIDMA
Copy data into DPRAM
Write 16 in HSSPICNT
Prepare RAM and HSSPIDMA
Copy 16 or nb_data left data
into DPRAM.
Write 16 or nb_data left in HSSPICNT
Init RAM data and HSSPIDMA
Copy data into DPRAM
Write 16 in HSSPICNT
Prepare RAM and HSSPIDMA
Copy nb_data left data into DPRAM.
Write nb_data left in HSSPICNT
Read SPICNT
Start copy of received data into
RAM using HSSPIDMA.
Read received data directly in RAM



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