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参数资料
| 型号： | FTRJ8519U1GNL |
| 元件分类： | 光收发 |
| 英文描述： | FIBER OPTIC TRANSCEIVER, 830-860nm, 2125Mbps(Tx), 2125Mbps(Rx), THROUGH HOLE MOUNT, LC CONNECTOR |
| 文件页数： | 12/15页 |
| 文件大小： | 356K |
| 代理商： | FTRJ8519U1GNL |
FTRJ8519U1xNL 2x6 Pin SFF Product Specification – March 2005
Finisar Corporation March 23, 2005 Rev D
Page 6
VIII. Digital Diagnostic Functions
Finisar FTRJ8519U1xNL 2x6 transceivers provide a unique digital diagnostic monitoring
interface, which allows real-time access to device operating parameters such as
transceiver temperature, laser bias current, transmitted optical power, received optical
power and transceiver supply voltage. It also defines a sophisticated system of alarm and
warning flags, which alerts end-users when particular operating parameters are outside of
a factory set normal range.
In order to access the digital diagnostics functionality, the transceivers have a 2-wire
serial communication protocol that is similar to that defined in the SFP MSA4. The
digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h)
only. The memory map for this interface is defined below. Additional information,
including details on the electrical interface, is described in Finisar Application Note AN-
2030: “Digital Diagnostics Monitoring Interface for SFP Optical Transceivers”. (Note:
only pages 17-35 of this Application note, including Section 4 are relevant to Finisar 2x6
transceivers.)
The standard SFP MSA serial ID provides access to identification information that
describes the transceiver’s capabilities, standard interfaces, manufacturer, and other
information. Finisar 2x6 transceivers provide access to a condensed version of this
information, over the 2-wire serial interface at the 8 bit address 1010000X (A2h) in bytes
128-190.
The operating and diagnostics information is monitored and reported by a Digital
Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed
through the 2-wire serial interface. When the serial protocol is activated, the serial clock
signal (SCL) is generated by the host. The positive edge clocks data into the 2x6
transceiver into those segments of the E2PROM that are not write-protected. The
negative edge clocks data from the 2x6 transceiver. The serial data signal (SDA) is bi-
directional for serial data transfer. The host uses SDA in conjunction with SCL to mark
the start and end of serial protocol activation. The memories are organized as a series of
8-bit data words that can be addressed individually or sequentially.
Digital diagnostics for the FTRJ8519U1xNL are internally calibrated by default.
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