NUMBER

GS-12-0974

TYPE

Product Specification

TITLE

PAGE

REVISION

TRX10GDP0310C1 (SFP+ LR Module)

9 of 14

A

AUTHORIZED BY

DATE

J. Blank

11 July 2011

CLASSIFICATION

UNRESTRICTED

Copyright © 2011 FCI Deutschland GmbH. FCI Deutschland GmbH reserves the right to make changes to this document at any time without notice.

Information in this document is believed to be reliable. However, no responsibility is assumed for possible inaccuracy or omission.

Interfacing the Transceiver

Communication is done by a serial 2-wire interface compatible to the I2C bus protocol. Refer to SFF-8472 for

a more detailed explanation of the registers:

Base Address A0h

Register

Content

0 - 95

Serial Transceiver ID as

defined in SFP MSA

96 - 127

FCI Specific

128 - 255

Reserved

Digital Optical Monitoring

The transceiver offers the ability to monitor important module parameter during operation. All five parameters

listed below are continuously monitored for getting information about the current module status. All data is

calibrated internally; there is no need for external post processing.

Temperature

Internally measured temperature data is represented as two’s complement of a signed 16-bit value in

increments of 1/256 °C over a range of -40 to +100 °C. Accuracy is better than +/-3 °C.

Supply Voltage (VCC)

Internally measured supply voltage. Represented as a 16-bit unsigned integer with the voltage defined as the

full 16 bit value (0 – 65535) with LSB equal to 100 µVolt, which yields to a total range of 0 to +6.55 Volts.

Accuracy is better than +/-3 %.

Laser Bias Current

The DFB laser bias current is represented as a 16 bit unsigned integer with the current defined as the full 16-

bit value (0 – 65535) with LSB equal to 2 µA. Accuracy is better than +/-10 %.

Optical Transmitter Power

TX output power measurement is based on internal monitor diode feedback. Represented as a 16-bit

unsigned integer with the power defined as the full 16 bit value (0 – 65535) with LSB equal to 0.1 µW.

Receiver Optical Power

RX input power measurement is based on photodiode average current. Represented as a 16-bit unsigned

integer with the power defined as the full 16 bit value (0 – 65535) with LSB equal to 0.1 µW. Accuracy is

better than +/-3 dB over a range of -15 dBm to 0.5 dBm.

Note: The specified characteristics are met within the recommended range of operating conditions regarding temperature and voltage.

Base Address A2h

Register

Content

0 - 55

Alarm & Warnings

Thresholds & Limits

56 - 95

External calibration

constants (not used)

96 – 119

Values from real time

diagnostic monitoring

128 – 247

Customer specific, writable

area

248 - 255

Reserved

PDS: Rev :A

STATUS:Released

Printed: Jan 03, 2012