Finisar AN-2030 specifications Wire Protocol Data Transfer Protocol

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AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers

F i n i s a r

of the command/control byte (R/W) defines the operation to be performed. When set to a 1 a read operation is selected, and when set to a 0 a write operation is selected.

Following the START condition, the DDTC monitors the SDA bus checking the device type identifier being transmitted. Upon receiving the chip address control code, and the read/write bit, the slave device outputs an acknowledge signal on the SDA line.

Figure 1: 2- Wire Protocol Data Transfer Protocol

Figure 2: 2- Wire AC Characteristics

(Please see definitions in the following pages)

9/26/02 Revision D

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Contents 35 2. Applicable Documents Scope and OverviewEnhanced Digital Diagnostic Interface Definition Overview Specific Data Field Descriptions Password Entry 8 bytesCal Constants Bytes Control Functions 8 bytesSerial ID Data Fields Address A0 DataName Bytes Description of Field Address Identifier ConnectorIdentifier values Extended IdentifierDescription of connector Connector valuesTransceiver codes TransceiverEncoding 4a Sonet Reach SpecifiersSpeed Reach Specifier bit Description Code Description of encoding mechanismLength 9μ-km BR, nominalLength 9μ Length 50μVendor name Length CopperDwdm Channel Spacing Vendor OUIVendor Rev Laser WavelengthDwdm Wavelength Fraction Option values OptionsBR, max 13 BR, minDiagnostic Monitoring Type Date CodeData Description of field Address N i s a r Enhanced Options 10 I/O Timing for Soft Control & Status Functions SFF-8472 Compliance11 SFF-8472 Compliance Diagnostics 13 Digital temperature format Temperature 12 Bit weights C for temperature reporting registersN i s a r 14 Alarm and Warning Thresholds 2-Wire Address A2h Alarm and Warning ThresholdsN i s a r 16b Format for offsets 16a Unsigned fixed-point binary format for slopes16d Example of Floating Point Representation 16c IEEE-754 Single-Precision Floating Point Number FormatBit Name Description LOS Alarm and Warning Flags18 Alarm and Warning Flag Bits 2-Wire Address A2h 20 User Eeprom 2-Wire Address A2h 19 Password Addresses 2-Wire Address A2hByte Bit Name Description Address # Bytes Name DescriptionDdtc Electrical Interface Definition Overview Wire Interface OperationN i s a r Current Address Read Detailed 2 -Wire Serial Port Operation N i s a r Wire Protocol Data Transfer Protocol Vcc = 3.15V to DC Electrical CharacteristicsFor More Information
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