Xerox WorkCentre 385 Service Manual page 169

Table 3: Hardware Interface Signal Descriptions
Signal PIN No. Type
GP13, GP11 61, 63 I/O
GP[7:2] 5, 4, 3,
2
GP[21:19] 1, 100
GP[17:16] 91, 93, I
94
76, 75
NC 19, 20,
27
28, 29,
31
32, 33,
41
51, 62,
73
SYNCIN1 26 I
SYNCIN2 74 I
VC 48 O
RCVI 37 I
18 I
RXAMPI
SWGAINI 24 I
VREFN 42 O
AOUT 49 O
ADIN 87 I
ADOUT 35 O
I
DAIN 34
DAOUT 88 O
WorkCentre 385
Description
General Purpose I/O
General Purpose Input/Output
General Purpose Input
No Connection
Eye Sync Input 1, connect to SEPWCLK.
Eye Sync Input 2, connect to SEPWCLK.
Analog Interface
Center Voltage. 2.5V output and it needs an external capacitor.
Transmitter Disable. When tied to "1", it disables the transmitter side
of AFE.
Receiver Amplifier Input. This internally tied to pin17 which is Analog
Ground.
Externally connected to SWGAINI pin.
Negative Reference Voltage
Externally connected to bypass capacitor to ground.
Analog Loopback Interface
Analog-to-digital Data In. 1-bit input to the internal decimation filter.
Analog-to-digital Data Out. 1-bit input to the internal AFE's RXPATH.
Digital-to-analog Data In. 1-bit input to the internal AFE's RXPATH.
Digital-to-analog Data Out. 1-bit output from the internal digital
interpolation filter.
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Circuit Description