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MIC3002_10: 产品描述FOM Management IC with Internal Calibration; 文件大小1011KB，共65页; 制造商Microchip(微芯科技); 官网地址https://www.microchip.com

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MIC3002_10概述

FOM Management IC with Internal Calibration

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MIC3002

FOM Management IC with Internal

Calibration

General Description

The MIC3002 is a fiber optic module controller which enables

the implementation of sophisticated, hot-pluggable fiber optic

transceivers with intelligent laser control and an internally

calibrated Digital Diagnostic Monitoring Interface per SFF-

8472. It essentially integrates all non-datapath functions of an

SFP transceiver into a tiny (4mm x 4mm) QFN package. It

also works well as a microcontroller peripheral in

transponders or 10Gbps transceivers.

A highly configurable automatic power control (APC) circuit

controls laser bias. Bias and modulation are temperature

compensated using dual DACs, an on-chip temperature

sensor, and NVRAM look-up tables. A programmable

internal feedback resistor provides a wide dynamic range for

the APC. Controlled laser turn-on facilitates hot plugging.

An analog-to-digital converter converts the measured

temperature, voltage, bias current, transmit power, and

received power from analog to digital. An EEPOT provides

front-end adjustment of RX power. Each parameter is

compared against user-programmed warning and alarm

thresholds. Analog comparators and DACs provide high-

speed monitoring of received power and critical laser

operating parameters. Data can be reported as either

internally calibrated or externally calibrated.

An interrupt output, power-on hour meter, and data-ready

bits add user friendliness beyond SFF-8472. The interrupt

output and data-ready bits reduce overhead in the host

system. The power-on hour meter logs operating hours using

an internal real-time clock and stores the result in NVRAM.

In addition to the features listed above which are already

implemented in the previous controller MIC3001, the

MIC3002 features an extensive temperature range, options

to mask alarms and warnings interrupt and TXFAULT, and

ability to support up to four chips with the same address on

the serial interface.

Communication with the MIC3002 is via an industry standard

2-wire serial interface. Nonvolatile memory is provided for

serial ID, configuration, and separate OEM and user

scratchpad spaces. Two-level password protection guards

against data corruption.

Features

• Extensive temperature range

• Alarms and Warnings interrupt and TXFAULT masks

• Capability to support up to four chips on the serial

interface

• LUT to compensate for chip-FOM case temperature

difference

• APC or constant-current laser bias

• Turbo mode for APC loop start-up and shorter laser turn

on time

• Supports multiple laser types and bias circuit topologies

• Integrated digital temperature sensor

• Temperature compensation of modulation, bias, and

fault levels via NVRAM look-up tables

• NVRAM to support GBIC/SFP serial ID function

• User writable EEPROM scratchpad

• Diagnostic monitoring interface per SFF-8472

– Monitors and reports critical parameters:

temperature, bias current, TX and RX optical power,

and supply voltage

– S/W control and monitoring of TXFAULT, RXLOS,

RATESELECT, and TXDISABLE

– Internal or external calibration

– EEPOT for adjusting RX power measurement

• Power-on hour meter

• Interrupt capability

• Extensive test and calibration features

• 2-wire SMBus-compatible serial interface

• SFP/SFP+ MSA and SFF-8472 compliant

• 3.0V to 3.6V power supply range

• 5V-tolerant I/O

• Available in (4mm x 4mm) 24-pin QFN package

Applications

•

SFP/SFP+ optical transceivers

SONET/SDH transceivers and transponders

Fibre Channel transceivers

10Gbps transceivers

Free space optical communications

Proprietary optical links

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

July 2007

M9999-073107-B

hbwhelp@micrel.com

or (408) 955-1690

Micrel, Inc.

MIC3002

Contents

Pin Configuration ............................................................................................................................................................. 7

Pin Description ................................................................................................................................................................ 7

Absolute Maximum Ratings ............................................................................................................................................ 9

Operating Ratings ........................................................................................................................................................... 9

Electrical Characteristics ................................................................................................................................................. 9

Timing Diagram ............................................................................................................................................................. 14

Address Map ................................................................................................................................................................. 15

Block Diagram ............................................................................................................................................................... 18

Analog-to-Digital Converter/Signal Monitoring .............................................................................................................. 18

Temperature Reading Compensation ........................................................................................................................... 19

Alarms and Warnings Interrupt Source Masking .......................................................................................................... 20

Alarms and Warnings as TXFAULT Source ................................................................................................................. 21

Alarms and Warnings Latch .......................................................................................................................................... 21

SMBus Multipart Support .............................................................................................................................................. 21

Calibration Modes ......................................................................................................................................................... 22

A/ External Calibration ............................................................................................................................................ 22

Voltage .................................................................................................................................................................... 22

Temperature ........................................................................................................................................................... 22

Bias Current ............................................................................................................................................................ 22

TX Power ................................................................................................................................................................ 22

RX Power ................................................................................................................................................................ 23

B/ Internal Calibration ............................................................................................................................................. 23

Temperature Offset................................................................................................................................................. 25

C/ ADC Result Registers Reading .......................................................................................................................... 25

RXPOT ......................................................................................................................................................................... 25

Laser Diode Bias Control .............................................................................................................................................. 25

Laser Modulation Control .............................................................................................................................................. 26

Power ON and Laser Start-Up ...................................................................................................................................... 27

Fault Comparators ........................................................................................................................................................ 28

SHDN and TXFIN .......................................................................................................................................................... 29

Temperature Measurement........................................................................................................................................... 29

Diode Faults .................................................................................................................................................................. 29

Temperature Compensation ......................................................................................................................................... 29

Alarms and Warning Flags ............................................................................................................................................ 32

Control and Status I/O ................................................................................................................................................... 32

System Timing............................................................................................................................................................... 34

Warm Resets................................................................................................................................................................. 36

Power-On Hour Meter ................................................................................................................................................... 36

Test and Calibration Features ....................................................................................................................................... 37

Serial Port Operation ..................................................................................................................................................... 38

Page Writes ................................................................................................................................................................... 38

Acknowledge Polling ....................................................................................................................................................... 39

Write Protection and Data Security .................................................................................................................................. 39

OEM Password ........................................................................................................................................................ 39

User Password......................................................................................................................................................... 39

July 2007

M9999-073107-B

hbwhelp@micrel.com

or (408) 955-1690

Micrel, Inc.

MIC3002

Detailed Register Descriptions ...................................................................................................................................... 40

Alarm Threshold Registers ............................................................................................................................................ 40

Warning Threshold Registers........................................................................................................................................ 43

ADC Result Registers ................................................................................................................................................... 45

Alarm Flags ................................................................................................................................................................... 48

Warning Flags ............................................................................................................................................................... 49

Warning Status Register 0 (WARN0) ............................................................................................................................ 49

Warning Status Register 1 (WARN1) ............................................................................................................................ 49

OEM Password Entry (OEMPW) .................................................................................................................................. 50

USER Password Setting (USRPWSET) ....................................................................................................................... 50

USER Password (USRPW)........................................................................................................................................... 51

Power-On Hours ........................................................................................................................................................... 51

Data Ready Flags (DATARDY) ..................................................................................................................................... 51

USER Control Register (USRCTL) ............................................................................................................................... 52

OEM Configuration Register 0 (OEMCFG0) ................................................................................................................. 52

OEM Configuration Register 1 (OEMCFG1) ................................................................................................................. 53

OEM Configuration Register 2 (OEMCFG2) ................................................................................................................. 54

APC Setpoint x ............................................................................................................................................................. 54

Modulation Setpoint x ................................................................................................................................................... 54

BIAS

Fault Threshold (IBFLT)......................................................................................................................................... 55

Transmit Power Fault Threshold (TXFLT) .................................................................................................................... 55

Loss-Of-Signal Threshold (LOSFLT) ............................................................................................................................ 55

Fault Suppression Timer (FLTTMR) ............................................................................................................................. 55

Fault Mask (FLTMSK) ................................................................................................................................................... 56

OEM Password Setting (OEMPWSET) ........................................................................................................................ 56

OEM Calibration 0 (OEMCAL0) .................................................................................................................................... 57

OEM Calibration 1 (OEMCAL1) .................................................................................................................................... 57

OEM Calibration 1 (LUT Index) ..................................................................................................................................... 58

OEM Configuration 3 (OEMCFG3) ............................................................................................................................... 58

BIAS DAC Setting (APCDAC) Current VBIAS Setting .................................................................................................. 58

Modulation DAC Setting (MODDAC) Current VMOD Setting ....................................................................................... 59

OEM Readback Register (OEMRD) ............................................................................................................................. 59

Signal Detect Threshold (LOSFLTn) ............................................................................................................................. 59

RX EEPOT Tap Selection (RXPOT) ............................................................................................................................. 60

OEM Configuration 4 (OEMCFG4) ............................................................................................................................... 60

OEM Configuration 5 (OEMCFG5) ............................................................................................................................... 61

OEM Configuration 6 (OEMCFG6) ............................................................................................................................... 62

Power-On Hour Meter Data (POHDATA) ..................................................................................................................... 62

OEM Scratchpad Registers (SCRATCHn) .................................................................................................................... 63

RX Power Look-up Table (RXLUTn) ............................................................................................................................. 63

Calibration Constants (CALn) ....................................................................................................................................... 63

Manufacturer ID Register .............................................................................................................................................. 64

Device ID Register ....................................................................................................................................................... 64

Package Information ..................................................................................................................................................... 65

July 2007

M9999-073107-B

hbwhelp@micrel.com

or (408) 955-1690

Micrel, Inc.

MIC3002

List of Figures

Figure 1. MIC3002 Block Diagram ................................................................................................................................ 18

Figure 2. Analog-to-Digital Converter Block Diagram ................................................................................................... 18

Figure 3. Internal Calibration RX Power Linear Approximation .................................................................................... 25

Figure 4. RXPOT Block Diagram .................................................................................................................................. 25

Figure 5. MIC3002 APC and Modulation Control Block Diagram ................................................................................ 26

Figure 6. Programmable Feedback Resistor ................................................................................................................ 26

Figure 7. Transmitter Configurations Supported by MIC3002 ..................................................................................... 26

Figure 8. VMOD Configured as Voltage Output with Gain .......................................................................................... 27

Figure 9. MIC3002 Power-ON Timing .......................................................................................................................... 28

Figure 10. Fault Comparator Logic ............................................................................................................................... 28

Figure 11. Saturation Detector ...................................................................................................................................... 29

Figure 12. RXLOS Comparator Logic ........................................................................................................................... 29

Figure 13. Control and Status I/O Logic ........................................................................................................................ 33

Figure 14. Transmitter ON-OFF Timing ....................................................................................................................... 34

Figure 15. Initialization Timing with TXDISABLE Asserted .......................................................................................... 34

Figure 16. Initialization Timing with TXDISABLE Not Asserted .................................................................................. 34

Figure 17. Loss-of-Signal (LOS) Timing ...................................................................................................................... 35

Figure 18. Transmit Fault Timing .................................................................................................................................. 28

Figure 19. Successfully Clearing a Fault Condition ..................................................................................................... 36

Figure 20. Unsuccessful Attempt to Clear a Fault ....................................................................................................... 36

Figure 21. Write Byte Protocol ..................................................................................................................................... 38

Figure 22. Read Byte Protocol ..................................................................................................................................... 38

Figure 23. Read_Word Protocol................................................................................................................................... 38

Figure 24. Four-Byte Page_White Protocol ................................................................................................................. 39

July 2007

M9999-073107-B

hbwhelp@micrel.com

or (408) 955-1690

MIC3002_10

MIC3002_10概述

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