SSI / Encoder / Quadrature Counter (Module E7)68C3 Operations Manual North Atlantic Industries, Inc. 12/19/2014Rev: 2014-12-19-0947 www.naii.com Page 281 of 330Differential (DE) / Single-Ended (SE) SelectionBit Symbol Description Access ResetValue[15:1] - n/u (reserved, always returns 0) r 0[0] Diff_se Diff_se1 = sets single ended mode by grounding the ALO, BLO andINDEX pin.0 = Default; Differential Input Moder/w 0The (diff_se) bit selects single end operational mode. Setting this bit (1), switches the inverting (-) input pins (A,B, and INDX) to the channel’s isolated ground. This provides a ground return, and a ground reference for singleended signals.CPLD StatusBit Symbol Description Access ResetValue[15:8] - N/u r 0[7:6] - Always High (1) r 1[5] - Always Zero (0) r 0[4] Err_idx ERR_INDEX1= Error On Received Index Pulse. A one indicates a differenceon the LT2854 received data and the AM28LV32E receivers formore than 1usec.0 = Normal Operationr 0[3] Err_b ERR_CHB1= Error On Received Index Pulse. A one indicates a differenceon the LT2854 received data and the AM28LV32E receivers formore than 1usec.0 = Normal Operationr 0[2] Err_a ERR_CHA1= Error On Received Index Pulse. A one indicates a differenceon the LT2854 received data and the AM28LV32E receivers formore than 1usec.0 = Normal Operationr 0[1] - Always Zero (0) r 0[0] - Always Zero (1) r 0
