Rainbow Electronics DS1862 - Manual (Page 35)

DS1862
XFP Laser Control and Digital Diagnostic IC
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B1h
• LUT VALUE ......................< R-Module / W-Module ><00> This register contains the
fetched LUT value that drives the MODSET current. It can be read or overwritten to
directly control the MODSET current (manual mode).
B2h
• LUT_CONF.......................< R-Module / W-Module ><03>
Bit 0: AEN. A high on AEN enables data placed in the LUT Value register to drive MODSET.
Bit 1: TEN. A high on TEN enables the LUT index pointer to fetch data from the LUT.
Bit 2: SEEB. A high on SEEB disables EEPROM writes of Shadowed EEPROM locations.
Bit 3: Reserved.
Bit 4: Reserved.
Bit 5: Reserved.
Bit 6: Reserved.
Bit 7: Reserved.
B4h
• DAC STATUS ...................< R-Module / W-Module >
Bit 0: Reserved.
Bit 1: Reserved.
Bit 2: QT HIGH BIAS flag. This flag indicates that the current entering BIASSET is above the threshold.
Bit 3: QT TX-P High flag. This flag indicates that TX-P is above the threshold.
Bit 4: QT TX-P Low flag. This flag indicates that TX-P is below the threshold.
Bit 5: Reserved.
Bit 6: Shutdown flag. A high indicates that the DS1862 is in shutdown mode and that FETG is asserted.
Bit 7: Safety flag. A high indicates that a safety fault (quick trip) has occurred.
Table 5
B8h
• MOD_PW_CHNG .............< R-Module / W-Module > This is the 32-bit
location that the DS1862 uses to compare with the PWE to grant Module password
access.
80h
• DS60 SCALE....................< R-all/W-Factory > This unique 16-bit value sets
the SCALE register for use with a DS60 temperature sensor on AUX2MON.
82h
• LM5O SCALE...................< R-all/W-Factory > This unique 16-bit value sets
the SCALE register for use with a LM50 temperature sensor on AUX2MON.
87h
• V
THRSET_Value .................. < R-all / W-all ><80> This 8-bit value sets the voltage on
the signal conditioner voltage source, THRSET.