MIC3003 Datasheet, PDF (60/75 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibration

Micrel, Inc.
MIC3003
I_BIAS Fault Threshold (IBFLT)
Bias Current Fault Threshold
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default value
0000 0000b = 00h
Serial address
A6h
Byte address
7 = 07h
When the Fault Comparator is running, the eight-bit signed integer compensation value corresponding to the current
temperature is taken from the IFTLUT look-up table, added to IBFLT, and used for comparison with the laser bias current value
for fault generation. Faults are generated if the bias current value exceeds the compensated (LUT offset) IBFLT register
contents.
If DAC Calibration mode is selected in OEMCAL0, the output of the IFTLUT lookup table is disabled, so the unmodified IBFLT
register value propagates directly to the Fault Comparator DAC.
A valid OEM password is required for access to these registers. These registers are non-volatile and will be maintained through
power and reset cycles.
Transmit Power Fault Threshold (TXFLT)
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default value
0000 0000b = 00h
Serial address
A6h
Byte address
8 = 08h
When the Fault Comparator is running the TXFLT register value is used for comparison with the transmit power value for fault
generation. Faults are generated if the transmit power exceeds the TXFLT register contents.
A valid OEM password is required for access to this register. This register is non-volatile and will be maintained through power
and reset cycles.
Loss-Of-Signal Threshold (LOSFLT)
D[7]
read/write
Default value
Serial address
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
0000 0000b = 00h
A6h
D[2]
read/write
D[1]
read/write
D[0]
read/write
Byte address
9 = 09h
When the Fault Comparator is running, a fault is generated if the received power is lower than the LOSFLT value set in this
register.
A valid OEM password is required for access to this register. This register is non-volatile and will be maintained through power
and reset cycles.
November 2009
60
M9999-111209-C
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