AL55/66 Technical manual Version 1.1
Image 6.1 communication connector
Recomanded periferial connector is:
JST B 4B-XH-A with crimping contacts SXH-001T-P0.6
6.2 Mesage structure
Each communication sequence consists of two mesage string.
Mesage string in case of simple checksum use is structured as folows:
[ Destination address ]
[ Nr. of data bytes ]
[ Source address ]
[ Header ]
[ Data 1 ]
...
[ Data n ]
[ Checksum ]
There is an exeption of mesage structure when device respond to instruction Address
poll and Address clash
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. The respond consists of only one byte representing address
delayed for time proportional to address value. For CRC checksum case format is:
[ Destination address ]
[ Nr. of data bytes ]
[ CRC 16 LSB ]
[ Header ]
[ Data 1 ]
...
[ Data n ]
[ CRC 16 MSB ]
6.2.1 Address
Address range is from address 0 to address 255. Address 0 is special case or so caled
“brodcast” address and address 1 is default host address.
The recomandations for address value of different devices are presented in table 1.
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For details see cctalk44-2.pdf, Address poll
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