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Finisar AN-2030 specifications 4Overview, F i n i s a r

Models: AN-2030

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AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers

F i n i s a r

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23. Enhanced Digital Diagnostic Interface Definition

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4Overview

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6 The enhanced digital diagnostic interface is a superset of the MOD-DEF interface

7defined in the SFP MSA document dated September 14, 2000. The 2-wire interface pin

8definitions, hardware, and timing are clearly defined there, as well as in Section 4

9below. This section describes an extension to the memory map defined in the SFP

10MSA. The enhanced interface uses the two wire serial bus address 1010001X (A2h) to

11provide diagnostic information about the module’s present operating conditions. A

12memory map is shown in Figure 3.1 below.

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14The transceiver generates this diagnostic data by digitization of internal analog signals.

15Calibration and alarm threshold data is written during device manufacture.

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17In addition to generating digital readings of internal analog values, the device generates

18various status bits based on comparison between current values and factory-preset

19limits.

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9/26/02 Revision D

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Finisar AN-2030 specifications 4Overview, F i n i s a r

Contents

352. Applicable Documents F i n i s a r61. Scope and Overview Digital Diagnostic Monitoring Interface4Overview F i n i s a r38Specific Data Field Descriptions F i n i s a rData F i n i s a rTable 3.1 Serial ID Data Fields - Address A0 Name of1Identifier 15ConnectorF i n i s a r TABLE 3.2 Identifier valuesF i n i s a r TABLE 3.3 Connector valuesDescription of connector Table 3.4: Transceiver codes F i n i s a r1Transceiver 13Encoding F i n i s a rTable 3.4a SONET Reach Specifiers 9Length 9μ-km F i n i s a r1BR, nominal 18Length 9μ13Vendor name F i n i s a r4Length Copper 21DWDM Channel Spacing12Laser Wavelength F i n i s a r1Vendor Rev 20DWDM Wavelength FractionTable 3.6 Option values F i n i s a r1Options 8BR, maxDate Code 9Diagnostic Monitoring TypeF i n i s a r Table 3.7 Date CodeTable 3.8 Diagnostic Monitoring Type F i n i s a rTable 3.9 Enhanced Options F i n i s a r1Enhanced Options Table 3.11 SFF-8472Compliance F i n i s a r4SFF-8472Compliance 10CC EXT2Diagnostics F i n i s a rTemperature F i n i s a rTable 3.13 Digital temperature format F i n i s a r 1External Calibration12Alarm and Warning Thresholds F i n i s a r1Calibration Constants 2 Wire Address A2hF i n i s a r F i n i s a r Table 3.16b Format for offsetsF i n i s a r 19point format were posted on the worldwide web atName Real Time Diagnostic RegistersF i n i s a r DescriptionAlarm and Warning Flags F i n i s a rReserved Optional Alarm and Warning Flag Bits F i n i s a rF i n i s a r Table 3.19 Password Addresses 2-WireAddress A2hTable 3.20 User EEPROM 2-WireAddress A2h ByteF i n i s a r 2-WireInterface Operation4.DDTC Electrical Interface Definition Overview F i n i s a r 1.Clock up to nine cyclesRandom Read F i n i s a rCurrent Address Read Sequential Address ReadDetailed 2 -WireSerial Port Operation F i n i s a rF i n i s a r The DDTC may operate in the following two modesF i n i s a r Figure 1 2- Wire Protocol Data Transfer ProtocolFigure 2 2- Wire AC Characteristics Please see definitions in the following pagesF i n i s a r DC ELECTRICAL CHARACTERISTICSAC ELECTRICAL CHARACTERISTICS Vcc = 3.15V toFinisar Corporation 1308 Moffett Park Drive For More InformationF i n i s a r Sunnyvale, CA Tel