MIC3001 Datasheet, PDF (3/74 Pages) Micrel Semiconductor – SFP Management IC with Internal Calibration

MIC3001
Micrel
Fault Comparators ............................................................................................................................................................................ 23
Figure 9. Fault Comparator Logic .................................................................................................................................................... 23
SHDN and TXFIN ............................................................................................................................................................................... 23
Figure 10. Saturation Detector ........................................................................................................................................................ 24
Figure 11. RXLOS Comparator Logic ............................................................................................................................................. 24
Temperature Measurement .............................................................................................................................................................. 24
Diode Faults ....................................................................................................................................................................................... 24
Temperature Compensation ............................................................................................................................................................ 25
Table 13. Temperature Compensation Look-up Tables, Serial Address I2CADR + 4h .................................................................. 25
Table 14. APC Temperature Compensation Look-Up Table, Serial Address I2CADR+4h ............................................................. 26
Table 15. VMOD Temperature- Compensation Look-Up Table, Serial Address I2CADR+4h ........................................................ 26
Table 16. IBIAS Comparator Temperature Compensation Look-up Table, Serial Address I2CADR+4h ........................................ 26
Table 17. Bias Current High Alarm Temperature Compensation Table, Serial Address I2CADR+4h ............................................ 26
Table 18. Range of Temperature Compensation Tables vs. LUTOFF ............................................................................................ 27
Figure 12. Examples of LUTOFF Operation .................................................................................................................................... 27
Figure 13. Temperature Compensation Examples .......................................................................................................................... 28
Alarms and Warning Flags ............................................................................................................................................................... 29
Table 19. MIC3001 Events .............................................................................................................................................................. 29
Control and Status I/O ...................................................................................................................................................................... 29
Figure 14. Control and Status I/O Logic .......................................................................................................................................... 30
System Timing ................................................................................................................................................................................... 30
Figure 15. Transmitter ON-OFF Timing .......................................................................................................................................... 30
Figure 16. Initialization Timing with TXDISABLE Asserted ............................................................................................................. 30
Figure 17. Initialization Timing, TXDISABLE Not Asserted ............................................................................................................. 31
Figure 18. Loss-of-Signal (LOS) Timing .......................................................................................................................................... 31
Figure 19. Transmit Fault Timing .................................................................................................................................................... 31
Figure 20. Successfully Clearing a Fault Condition ......................................................................................................................... 32
Figure 21. Unsuccessful Attempt to Clear a Fault ........................................................................................................................... 32
Warm Resets ..................................................................................................................................................................................... 33
Power-On Hour Meter ....................................................................................................................................................................... 33
Table 20. Power-On Hour Meter Result Format .............................................................................................................................. 33
Test and Calibration Features ......................................................................................................................................................... 33
Table 21. Test and Diagnostic Features ......................................................................................................................................... 33
Serial Port Operation ........................................................................................................................................................................ 34
Figure 22. Write Byte Protocol ........................................................................................................................................................ 34
Figure 23. Read Byte Protocol ........................................................................................................................................................ 34
Figure 24. Read_Word Protocol ...................................................................................................................................................... 34
Page Writes ........................................................................................................................................................................................ 34
Figure 25. Four-Byte Page_Write Protocol ..................................................................................................................................... 35
Acknowledge Polling ........................................................................................................................................................................ 35
Write Protection and Data Security ................................................................................................................................................. 35
User Password .................................................................................................................................................................................. 35
Detailed Register Descriptions ........................................................................................................................................................ 36
Alarm Threshold Registers .............................................................................................................................................................. 36
Warning Threshold Registers .......................................................................................................................................................... 41
Checksum (CHKSUM) ....................................................................................................................................................................... 46
ADC Result Registers ....................................................................................................................................................................... 47
Alarm Flags ........................................................................................................................................................................................ 50
Warning Flags ................................................................................................................................................................................... 51
OEM Password Entry (OEMPW) ...................................................................................................................................................... 52
USER Password Setting (USRPWSET) ........................................................................................................................................... 52
August 2004
3
M9999-082404