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C-6 VS1MD User Manual
C.6.2 Detail Communication Protocol
C.6.2.1 Request for Read:
Request to read successive ‘N’ numbers of WORD from address “XXXX”.
Total bytes = 12
Note: Quotation marks (“ ”) indicate character.
C.6.2.2 Acknowledge Response:
Total bytes= 7 + n * 4 = Max 39
C.6.2.3 Negative Acknowledge Response:
Total bytes = 9
C.6.2.4 Request for Write:
Total bytes = 12 + n * 4 = Max 44
ENQ Drive No CMD Addres
s
Number of address to
read
SUM EOT
05h “01” to “R” “XXXX “1” to “8” = n “XX” 04h
1 byte 2 bytes 1 byte 4 bytes 1 byte 2 1
ACK Drive No CMD Data SUM EOT
06h “01” to “1F” “R” “XXXX” “XX” 04h
1 byte 2 bytes 1 byte N * 4 bytes 2 byte 1 byte
NAK Drive No CMD Error code SUM EOT
15h “01” to “1F” “R” “**” “XX” 04h
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte
ENQ Drive No CMD Address Number of
address to
read
Data SUM EOT
05h “01” to “W” “XXXX” “1” to “8” = n “XXXX “XX” 04h
1 byte 2 bytes 1 byte 4 bytes 1 byte n*4 2 1