Delta Electronics 10GBASE-SR XFP Optical Transceiver TSP-10G3A1EER - Manual (Page 8)

TSP-10G3A1EER
DELTA ELECTRONICS, INC.
8 Revision: S3
04/10/2007
www.deltaww.com
2. Shall be pulled up with 4.7K-10Kohms to a voltage between 3.15V and 3.45V on the host board.
7. Low Speed Electrical Hardware Pins
In addition to the 2-wire serial interface the XFP module has the following low speed pins for control and status:
• Mod_NR
• Mod_DeSel
• Interrupt
• TX_DIS
• Mod_ABS
• RX_Los
• P_Down/RST.
1 MOD_NR
The Mod_NR is an output pin that when High, indicates that the module has detected a condition that renders
transmitter and or receiver data invalid, shall consist of logical OR of the following signals:
• Transmit Signal Conditioner Loss of Lock
• Transmitter Laser Fault
• Receiver Signal Conditioner Loss of Lock
Other conditions deemed valuable to the detection of fault may be added to the Mod_NR.
The Mod_NR output pin is an open collector and must be pulled to Host_Vcc on the host board.
2 MOD_DESEL
The Mod_DeSel is an input pin. When held Low by the host, the module responds to 2-wire serial communication
commands. The Mod_DeSel allows the use of multiple XFP modules on a single 2-wire interface bus.
When the Mod_DeSel pin is “High”, the module shall not respond to or acknowledge any 2-wire interface
communication from the host. Mod_DeSel pin must be pulled to VCC3 in the module.
In order to avoid con.icts, the host system shall not attempt 2-wire interface communications within the Mod_DeSel
assert time after any XFP modules are deselected. Similarly, the host must wait at least for the period of the
Mod_DeSel deassert time before communicating with the newly selected module. The assertion and de-assertion
periods of different modules may overlap as long as the above timing requirements are met.
3 INTERRUPT
Interrupt is an output pin. When “Low”, indicates possible module operational fault or a status critical to the host
system. The Interrupt pin is an open collector output and must be pulled up to Host_Vcc the host board.
4 TX_DIS
TX_DIS is an input pin. When TX_DIS is asserted High, the XFP module transmitter output must be turned off. The
TX_DIS pin must be pulled up to VCC3 in the XFP module.