Kontron AT8902 - Manual (Page 63)

AT8902 Hardware Description
Page 3 - 29 AT8902 User Guide
The XFP cages have the following pin assignment.
Table 3-24: XFP Connector Pin Assignment
Pin No Signal Description
1 GND Module Ground
2 VEE5 Not connected
3 MOD_DE_SEL Module De-select; When held low, allows module to
respond to 2-wire serial interface
4 INTERRUPT# Not connected
5 TX_DIS Transmitter Disable; Turns off transmitter laser output
6 VCC5 +5V Power Supply
7 GND Module Ground
8 VCC3 +3.3V Power Supply
9 VCC3 +3.3V Power Supply
10 SCL I²C Serial Interface Clock
11 SDA I²C Serial Interface Data Line
12 MOD_ABS Indicates Module is not present. Grounded in the Module
13 MOD_NR Module Not Ready; Indicating XFP Module Operational
Fault
14 RX_LOS Receiver Loss Of Signal Indicator
15 GND Module Ground
16 GND Ground
17 RD- Transmitter Inverted Data Input
18 RD+ Transmitter Non-Inverted Data Input
19 GND Ground
20 VCC2 +1.8V Power Supply
21 P_DOWN/RST Power down: When high, requires the module to limit
power consumption to 1.5W or below. I²C serial interface
must be functional in the low power mode.
Reset: The falling edge initiates a complete reset of the
module including the I²C serial interface, equivalent to a
power cycle.
22 VCC2 +1.8V Power Supply
23 GND Ground
24 REFCLK+ Reference Clock Non-Inverted Input, AC coupled on the
host board
25 REFCLK- Reference Clock Inverted Input, AC coupled on the host
board
26 GND Module Ground
27 GND Module Ground
28 TD- Receiver Inverted Data Output
29 TD+ Receiver Non-Inverted Data Output
30 GND Module Ground