TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual CCDI 21
© Tait Electronics Limited April 2007
■ s = 73h, 0 = 30h, D = 44h etc. therefore the modulo-2 sum is:
73 + 30 + 44 + 30 + 35 + 30 + 38 + 30 + 30 + 54 + 45 + 53 +
54 + 48 + 69 + 21 = 426h
2. Retain bits 0 to 7, discarding any higher order bits resulting from the
summation.
26h
3. Form the two’s complement of the remainder.
26h = 0010 0110
two’s complement = 1101 1010
4. Convert the binary number into two ASCII hex digits, MSD first.
1101 1010 = DA
Checksum Software
Application
A software application is available from Tait Technical Support which will
calculate the checksum for any given command and parameters.
Please contact Technical Support (refer to “Contact Information” on
page 2).
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