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| F i n i s a r | |||||
| Real Time Diagnostic Registers |
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| TABLE 3.17: A/D Values and Status Bits (2 Wire Address A2h) | |||||
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| Byte | Bit | Name | Description |
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| Converted analog values. Calibrated 16 bit data. |
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| 96 | All | Temperature MSB | Internally measured module temperature. |
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| 97 | All | Temperature LSB |
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| 98 | All | Vcc MSB | Internally measured supply voltage in transceiver. |
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| 99 | All | Vcc LSB |
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| 100 | All | TX Bias MSB | Internally measured TX Bias Current. |
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| 101 | All | TX Bias LSB |
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| 102 | All | TX Power MSB | Measured TX output power. |
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| 103 | All | TX Power LSB |
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| 104 | All | RX Power MSB | Measured RX input power. |
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| 105 | All | RX Power LSB |
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| 106 | All | Reserved MSB | Reserved for 1st future definition of digitized analog input |
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| 107 | All | Reserved LSB | Reserved for 1st future definition of digitized analog input |
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| 108 | All | Reserved MSB | Reserved for 2nd future definition of digitized analog input |
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| 109 | All | Reserved LSB | Reserved for 2nd future definition of digitized analog input |
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| Optional Status/Control Bits |
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| 110 | 7 | TX Disable State | Digital state of the TX Disable Input | Pin. | Updated within |
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| 100msec of change on pin. This function is implemented in |
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| all Finisar transceivers with digital diagnostic capability. |
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| 110 | 6 | Soft TX Disable | Read/write bit that allows software disable of laser. Writing |
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| ‘1’ disables laser. Turn on/off time is 100 msec max from |
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| acknowledgement of serial byte transmission. This bit is |
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| “OR”d with the hard TX_DISABLE pin value. Note, per SFP |
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| MSA TX_DISABLE pin is default enabled unless pulled low |
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| by hardware. If Soft TX Disable is not implemented, the |
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| transceiver ignores the value of this bit. Default power up |
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| value is 0. This function is not implemented in Finisar |
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| 110 | 5 | Reserved |
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| 110 | 4 | RX Rate Select State | Digital state of the SFP RX Rate Select Input Pin. Updated |
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| within 100msec of change on pin. This function is not |
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| implemented in Finisar transceivers. |
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| 110 | 3 | Soft RX Rate Select | Read/write bit that allows software RX rate select. Writing ‘1’ |
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| selects full bandwidth operation. This bit is “OR’d with the |
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| hard RX RATE_SELECT pin value. | Enable/disable time is |
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| 100msec max from acknowledgement of serial byte |
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| transmission. Soft RX rate select does not meet the |
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| autonegotiation requirements specified in |
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| power up is zero. If Soft RX Rate Select is not implemented, |
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| the transceiver ignores the value of this bit. This function is |
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| not implemented in Finisar transceivers. |
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| 110 | 2 | TX Fault | Digital state of the TX Fault Output | Pin. | Updated within |
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| 100msec of change on pin. This function is not implemented |
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| in Finisar transceivers. |
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9/26/02 Revision D | Page 24 |