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Clock Data Bits Out on -ve Clock Edge MSB First (no Read)
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Use if TCK/SK starts at '0'.

0x13,
Length,
Byte1



This will clock out bits on TDI/DO from 1 to 8 depending on the
Length byte. A length of 0x00 will do 1 bit and a length of 0x07 will do 8 bits. The data is sent MSB first. Bit 7 of the data byte is placed on TDI/DO then the TCK/SK pin is clocked. The data will change to the next bit on the falling edge of the TCK/SK pin.