User Manual

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Use the G command to turn on the checksum mode. In checksum mode, two characters are

added to the response string between the message string and the termination sequence,

(l/f)(c/r). The checksum is formed by setting an 8 bit checksum value to all 1’s and then

performing an exclusive or operation (XOR) between the existing checksum value and each

character of the response string in turn, until all the characters are processed. The resulting 8

bit checksum is then converted into two separate characters as shown below.

Checksum value: c7 c6 c5 c4 c3 c2 c1 c0

First checksum character to be transmitted: 0 1 0 0 c7 c6 c5 c4

Second checksum character to be transmitted: 0 1 0 0 c3 c2 c1 c0

These two characters are appended to the response string followed by the

termination sequence. Use the H command to turn the checksum mode off.