6-12PinNo.Pin Name SignalNameI/O Description InputTypeOutputType2 GP04 Rrelay 2 O General purpose input/output IB OB3 GP05 Rrelay 3 O General purpose input/output IB OB4 GP06 RING_OFF O General purpose input/output IB OB5 GP07 BREAK O General purpose input/output IB OB6 OVD2 GND GND Connect to digital ground7 OVD2 GND GND Connect to digital ground8 D7 D7 I/O Data bus line 7 IA OB9 D6 D6 I/O Data bus line 6 IA OB10 D5 D5 I/O Data bus line 5 IA OB11 D4 D4 I/O Data bus line 4 IA OB12 D3 D3 I/O Data bus line 3 IA OB13 D2 D2 I/O Data bus line 2 IA OB14 D1 D1 I/O Data bus line 1 IA OB15 D0 D0 I/O Data bus line 0 IA OB16 OVD2 GND GND Connect to digital ground17 OVA AGND GND Connect to analog ov ground18 RAMPIN R Receiver amplifier input19 NC No connection20 NC No connection21 OVA AGND GND Connect to analogy OV ground22 +5VD2 VDD PWR Connect to digital +5V power23 OVD1 GND GND Connect to digital ground24 SWGAINI R Connect to SWGAINO25 ECLKIN1 R Connect to SWGAINI26 SYNCIN1 R Connect to EYESYNC27 NC No connection28 NC No connection29 NC No connection30 OVA AGND GND Connect to analogy OV ground31 NC No connection32 NC No connection33 NC No connection34 DAIN R Connect to daout35 ADOUT R ADC output36 BYPASS GP13 I Receiver highpass filter bypass enable IC37 RCVI R Connect to RCVO38 TXLOSS3 I 8dB of analog transmit level attenuation IC39 TXLOSS2 I 4dB of analog transmit level attenuation IC40 TXLOSS1 I 2dB of analog transmit level attenuation IC41 NC No connection42 NC No connection43 OVA AGND GND Connect to analog OV ground44 TXOUT AA Connect to smoothing filter input45 RXIN AB Connect to anti-aliasinf filter output