MIC3000_07 Datasheet, PDF (3/68 Pages) Micrel Semiconductor – FOM Management IC

MIC3000
Micrel
Table 12. APC Temperature Compensation Look-Up Table, Serial Address I2CADR+4h ............................................................... 23
Table 13. VMOD Temperature- Compensation Look-Up Table, Serial Address I2CADR+4h .......................................................... 23
Table 14. IBIAS Comparator Temperature Compensation Look-up Table, Serial Address I2CADR+4h ......................................... 23
Table 15. Bias Current High Alarm Temperature Compensation Table, Serial Address I2CADR+4h .............................................. 23
Table 16. Range of Temperature Compensation Tables vs. LUTOFF .............................................................................................. 24
Figure 11. Examples of LUTOFF Operation ....................................................................................................................................... 24
Figure 12. Temperature Compensation Examples ............................................................................................................................. 25
Alarms and Warning Flags ................................................................................................................................................................... 26
Table 17. MIC3000 Events ................................................................................................................................................................. 26
Control and Status I/O .......................................................................................................................................................................... 26
Figure 13. Control and Status I/O Logic .............................................................................................................................................. 27
System Timing ....................................................................................................................................................................................... 27
Figure 14. Transmitter ON-OFF Timing .............................................................................................................................................. 27
Figure 15. Initialization Timing with TXDISABLE Asserted ................................................................................................................ 27
Figure 16. Initialization Timing, TXDISABLE Not Asserted ................................................................................................................ 28
Figure 17. Loss-of-Signal (LOS) Timing ............................................................................................................................................. 28
Figure 18. Transmit Fault Timing ........................................................................................................................................................ 28
Figure 19. Successfully Clearing a Fault Condition ............................................................................................................................ 29
Figure 20. Unsuccessful Attempt to Clear a Fault .............................................................................................................................. 29
Warm Resets .......................................................................................................................................................................................... 30
Power-On Hour Meter ........................................................................................................................................................................... 30
Table 18. Power-On Hour Meter Result Format ................................................................................................................................. 30
Test and Calibration Features ............................................................................................................................................................. 30
Table 19. Test and Diagnostic Features ............................................................................................................................................. 30
Serial Port Operation ............................................................................................................................................................................ 31
Figure 21. Write Byte Protocol ............................................................................................................................................................ 31
Figure 22. Read Byte Protocol ............................................................................................................................................................ 31
Figure 23. Read_Word Protocol .......................................................................................................................................................... 31
Page Writes ............................................................................................................................................................................................ 31
Figure 24. Four-Byte Page_Write Protocol ......................................................................................................................................... 32
Acknowledge Polling ............................................................................................................................................................................ 32
Write Protection and Data Security ..................................................................................................................................................... 32
User Password ....................................................................................................................................................................................... 32
Detailed Register Descriptions ............................................................................................................................................................ 33
Alarm Threshold Registers .................................................................................................................................................................. 33
Warning Threshold Registers .............................................................................................................................................................. 38
ADC Result Registers ........................................................................................................................................................................... 44
Alarm Flags ............................................................................................................................................................................................ 47
Warning Flags ........................................................................................................................................................................................ 48
Applications Information ...................................................................................................................................................................... 61
Controlling Laser Diode Bias ............................................................................................................................................................... 61
Figure 25. Example APC Circuit for Common-Cathode TOSA .......................................................................................................... 61
Figure 26. Example APC Circuit for Common Anode TOSA .............................................................................................................. 61
Choosing CCOMP ................................................................................................................................................................................. 62
Figure 27. Slew Rate vs. CCOMP Value ............................................................................................................................................ 62
Figure 28. Open Loop Unity-Gain Bandwidth vs. CCOMP ................................................................................................................. 62
Table 20. Typical Values for CCOMP ................................................................................................................................................. 62
Measuring Laser Bias Current ............................................................................................................................................................. 62
Interfacing To Laser Drivers ................................................................................................................................................................ 63
SY88912 3.3V 3.2Gbps SONET/SDH Laser Driver ............................................................................................................................. 63
Figure 29. Controlling the SY88912 Modulation Current .................................................................................................................... 63
October 2004
3
M9999-101204