MIC3003 Datasheet, PDF (72/75 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibration

Micrel, Inc.
MIC3003
Power-On Hour Meter Data (POHDATA)
D[7]
read/write
D[6]
read/write
D[5]
read/write
Default values for all bytes when the MIC3003
is shipped
Serial address
Byte addresses
D[4]
read/write
D[3]
read/write
0000 0000b = 00h
D[2]
read/write
A6h
32 – 34 and 36 - 38 = 20h - 22h and 24h - 26h
D[1]
read/write
D[0]
read/write
These registers are used for backing up the POH result during power cycles. At power-up, the POH meter selects the larger of
the two values as the initial count. Incremental results are stored in alternate register pairs. The power-on hour meter may be
reset or preset by writing to these registers.
These registers are not typically intended to be used by the OEM or end user. The current value of the power-on hours meter
may be read from the POHh and POHl registers.
If it is necessary to preset the power-on hours meter to a specific value, please consult the factory for the exact format to be
written to the POHDATA registers.
These registers are non-volatile and will be maintained through power and reset cycles. A valid OEM password is required for
access to these registers.
Byte
3
2
1
0
Weight
POHA, high-byte
POHA, low-byte
POHB, high-byte
POHB, low-byte
Default value
Serial address
Byte addresses
OEM Scratchpad Registers (SCRATCHn)
0000 0000b = 00h
A6h
136 - 207 (88 - CF_h)
208 - 221 (D0 - DD_h): This area is part of the OEM scratch pad only if the hard-
coded delimiters option for receive power linearization is used.
222 - 250 (DE - FA_h)
The scratchpad registers are general-purpose non-volatile memory locations. They can be freely read from and written to any
time the MIC3003 is in OEM mode.
November 2009
72
M9999-111209-C
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