Data is output expressing 1 digit with 4 bits and expressing 3-digit integers and signs with 16 bits.
15 to 12 bits
Sign. (positive: 0000, negative: 1111)
11 to 0 bits
Data is expressed with 1 digit for every 4 bits and is expressed from the hundreds place (bits 11 - 8: 3rd digit) to the ones place (bits 3 - 0: 1st digit).