Finisar AN-2030 User Manual

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AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r
9/26/02 Revision D Page 1
1
Application Note AN-2030 2
Digital Diagnostic Monitoring Interface 3
for SFP Optical Transceivers 4
5
1. Scope and Overview 6
7
This document defines an enhanced digital diagnostic monitoring interface available in 8
Finisar SFP and GBIC optical transceivers. The interface allows real time access to 9
device operating parameters, and it includes a sophisticated system of alarm and 10
warning flags which alerts end-users when particular operating parameters are outside 11
of a factory set normal range. The interface is fully compliant with SFF-8472, “Digital 12
Diagnostic Monitoring Interface for Optical Transceivers", revision 9.3. 13
14
These digital diagnostic features are implemented in all Finisar SFP transceivers that 15
contain a “D” in the part number suffix (for example, FTRJ-1319-7D-2.5), as well as 16
DWDM and CWDM GBICs. All next generation Finisar SFPs utilizing the new part 17
numbering scheme (e.g. FTRJ1621P1BCL) also have the same diagnostic capability. 18
19
The interface is an extension of the serial ID interface defined in the GBIC specification 20
as well as the SFP MSA. Both specifications define a 256-byte memory map in 21
EEPROM, which is accessible over a 2-wire serial interface at the 8 bit address 22
1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit 23
address 1010001X (A2h), so the originally defined serial ID memory map remains 24
unchanged. The interface is identical to, and is thus fully backward compatible with both 25
the GBIC Specification and the SFP Multi Source Agreement. The complete interface is 26
described in Section 3 below. 27
28
The operating and diagnostics information is monitored and reported by a Digital 29
Diagnostics Transceiver Controller (DDTC), which is accessed via a 2-wire serial bus. 30
Its physical characteristics are defined in Section 4. 31
32
33
34
2. Applicable Documents 35
36
Gigabit Interface Converter (GBIC). SFF document number: SFF-0053, rev. 5.5, 37
September 27, 2000. 38
39
Small Form Factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA), 40
September 14, 2000. 41
42
Digital Diagnostic Monitoring Interface for Optical Transceivers: SFF-8472, Draft 43
Revision 9.3, August 1, 2002. 44
45
46
47
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Summary of Contents

Page 1 - F i n i s a r

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 1 1 Application Note AN-2030 2

Page 2

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 10 transceiver technology. It is

Page 3

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 11 Vendor Rev 1 The vendor revis

Page 4

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 12 Options 1 The bits in the opt

Page 5

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 13 1 Date Code 2 The date code

Page 6

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 14 Table 3.8: Diagnostic Monitor

Page 7

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 15 Enhanced Options 1 “Enhanced

Page 8

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 16 1 Table 3.10: I/O Timing for

Page 9

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 17 1 Diagnostics 2 2 wire seria

Page 10

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 18 calibrated to absolute units

Page 11

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 19 External Calibration 1 Measur

Page 12

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 2 1 3. Enhanced Digital Diagno

Page 13

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 20 5) Measured received optica

Page 14

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 21 Calibration Constants 1 2 TA

Page 15

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 22 The slope constants at addres

Page 16

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 23 1 Table 3.16c: IEEE-754 Sing

Page 17

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 24 Real Time Diagnostic Registers

Page 18

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 25 110 1 LOS Digital state of t

Page 19

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 26 Table 3.18: Alarm and Warning F

Page 20

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 27 Bytes 123 – 126 contain write-o

Page 21

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 28 4. DDTC Electrical Interface

Page 22

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 29 2-Wire Interface Reset: After

Page 23

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 3 1 Figure 3.1: Digital Diagnos

Page 24

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 30 Acknowledge Polling: Once the

Page 25

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 31 Detailed 2-Wire Serial Port Op

Page 26

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 32 Within the bus specifications a

Page 27

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 33 of the command/control byte (R/

Page 28

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 34 DC ELECTRICAL CHARACTERISTICS

Page 29

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 35 For More Information Finisar

Page 30

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 4 Table 3.1 Serial ID: Data Fiel

Page 31

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 5 Identifier 1 The identifier

Page 32

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 6 1 TABLE 3.3: Connector value

Page 33

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 7 Transceiver 1 The following bi

Page 34

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 8 The SONET compliance code bits

Page 35

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r 9/26/02 Revision D Page 9 BR, nominal 1 The nominal bit

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