The MDB Specification for lay people
I'm mainly working off of the specifications document by the NAMA people located at http://www.vending.org/technology/MDB_Version_4-1.pdf
GRN 6 MCommon 3 NC RED 5 MTX 2 0DC BRN BLK 4 MRX 1 34DC WHT
1 start bit, 8 bits data, 1 mode bit, 1 check bit, 1 stop bit
- drop carry byte, address+all data bytes.
- A checksum will not be performed on ACK, NAK, or RET bytes.
- from vmc sets if byte is address
- from slave if last byte of data (or finished talking to master?)
"Each peripheral should be polled every 25-200 milliseconds. This can be done by
the POLL command or any other appropriate command."
Mtx need to source 100ma in order to drive optos!
Vertical Header: Molex 39-28-1063 ~1.25 on digikey
Right Angle Header: Molex 39-30-1060 ~1.25 on digikey