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AT83SND2CMP3 Datasheet(PDF) 54 Page - ATMEL Corporation |
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AT83SND2CMP3 Datasheet(HTML) 54 Page - ATMEL Corporation |
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54 / 97 page  54 AT83SND2CMP3 7524B–MP3–05/06 Table 48. Command Token Format Response Token Format There are five types of response tokens (R1 to R5). As shown in Figure 43, responses have a code length of 48 bits or 136 bits. A response token is preceded by a Start bit: a low level on MCMD line and succeeded by an End bit: a high level on MCMD line. The command content is preceded by a Transmission bit: a low level on MCMD line for a response token (card to host) and succeeded (R1,R2,R4,R5) or not (R3) by a 7 - bit CRC. Response content contains mirrored command and status information (R1 response), CID register or CSD register (R2 response), OCR register (R3 response), or RCA regis- ter (R4 and R5 response). Figure 43. Response Token Format Table 49. R1 Response Format (Normal Response) Table 50. R2 Response Format (CID and CSD registers) Bit Position 47 46 45:40 39:8 7:1 0 Width (Bits) 116 32 7 1 Value ‘0’ ‘1’ - - - ‘1’ Description Start bit Transmission bit Command Index Argument CRC7 End bit Bit Position 47 46 45:40 39:8 7:1 0 Width (bits) 11 6 32 7 1 Value ‘0’ ‘0’ - - - ‘1’ Description Start bit Transmission bit Command Index Card Status CRC7 End bit Bit Position 135 134 [133:128] [127:1] 0 Width (bits) 116 32 1 Value ‘0’ ‘0’ ‘111111’ - ‘1’ Description Start bit Transmission bit Reserved Argument End bit 0 Total Length = 48 bits Content CRC 0 1 R1, R4, R5 0 Total Length = 136 bits Content = CID or CSD CRC 0 1 R2 0 Total Length = 48 bits Content 0 1 R3 |
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