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AT90SCR100 Datasheet(PDF) 344 Page - ATMEL Corporation |
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AT90SCR100 Datasheet(HTML) 344 Page - ATMEL Corporation |
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344 / 433 page  344 TPR0327AY–SMS–30Jan09 AT90SCR100 ; Init address in AES memory (for 128bits, starting at #16) ldi r16, 0x10 sts AESADDR, r16 call keydata_load ; Loading Data ldi r16, (1<<AUTOINC) || (1<<KD) sts AESACR, r16 ; Init address in AES memory clr r16 sts AESADDR, r16 movw ZL, YL call keydata_load ; Start Encryption ldi r16, (1<<ENCRYPT) sts AESCR, r16 ori r16, (1<<AESGO) sts AESCR, r16 poll_end_AES: lds r16, AESCR sbrs r16, AESIF rjmp poll_end_AES ; read the result back ldi r16, (1<<KD) sts AESACR, r1 clr r16 sts AESADDR, r16 ldi r16, 16 ldi r17, (1<<KD) ori r17, (1<<MANINC) ; update X register for reverted copy adiw XL, 16 ReadResult: ; copy the result in the X targeted area lds r18, AESDR st -X, r18 ; update internal address sts AESACR, r17 |
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