MIC3003 Datasheet, PDF (69/75 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibration

Micrel, Inc.
MIC3003
OEM Configuration 4 (OEMCFG4)
D[7]
TXF_WRN
read/write
D[6]
TXF_ALM
read/write
D[5]
LAT_WRN
read/write
D[4]
LAT_ALM
read/write
D[3]
ISTART[3]
read/write
D[2]
ISTART[2]
read/write
D[1]
ISTART[1]
read/write
D[0]
ISTART[0]
read/write
Default value
0000 0000b = 00h
Serial address
A6h
Byte address
25 = 19h
This register is non-volatile and will be maintained through power and reset cycles. A valid OEM password is required for
access to these registers.
Bit(s)
D[7]
D[6]
D[5]
D[4]
D[3:0]
Function
TXF_WRN
Operation
Allows warnings to assert
TXFAULT
TXF_ALM
Allows alarms to assert
TXFAULT
LAT_WRN Warning latch
LAT_ALM Alarm latch
ISTART[3:0] I_START current level selection.
0: Warnings do not assert TXFAULT
1: Warnings assert TXFAULT
The RXPWR low warning flag does not assert TXFAULT
0: Alarms do not assert TXFAULT
1: Alarms assert TXFAULT
The RXPWR low alarm flag does not assert TXFAULT
0: Warnings flags are latched. They are cleared by reading
the register or toggling TXDISABLE.
1: Warnings flags are not latched., i.e. they are set and reset
with the warning condition. The flags are also cleared by
reading the register or toggling TXDISABLE.
0: Alarms flags are latched. They are cleared by reading the
register or toggling TXDISABLE.
1: Alarms flags are not latched., i.e. they are set and reset
with alarm condition. The flags are also cleared by reading
the register or toggling TXDISABLE.
I_START current level selection:
0000 = No I_START current
0001 - 1111 = 0.375 mA x I_START[[3:0]
I_START is used to speed up the laser start-up after a fault
occurs. The charging current of the compensation capacitor
starts from I_START instead of ramping up from 0.
November 2009
69
M9999-111209-C
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