MIC3003_11 Datasheet, PDF (62/75 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibration

Micrel, Inc.
MIC3003
OEM Password Setting (OEMPWSET)
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 for all bytes
0000 0000b = 00h
Serial address
A6h
Byte addresses
12 - 15 = 0Ch - 0Fh
This four-byte field is the password required for access to the OEM area of the MIC3003’s memory and registers. This field is
compared to the four-byte OEMPW field at serial address A2h. If the two fields match, access is allowed to the OEM areas of
the MIC3003 non-volatile memory at serial addresses A4h and A6h.
The OEM password may be set by writing the new value into OEMPWSET. The new password will not take effect until after a
power-on reset occurs or a warm reset is performed using the RST bit in OEMCFG0. This allows the new password to be
verified before it takes effect.
These registers are non-volatile and will be maintained through power and reset cycles. A valid OEM password is required for
access to this register.
Byte
3
2
1
0
Weight
OEM Password, Most Significant Byte
OEM Password, 2nd Most Significant Byte
OEM Password, 2nd Least Significant Byte
OEM Password, Least Significant Byte
OEM Calibration 0 (OEMCAL0)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
reserved
read-only
FLTDIS
read/write
FSPIN
read/write
WRINH
read/write
APCCAL
read/write
reserved
read-only
reserved
read-only
FRCOPS
read/write
Default value
0000 0000b = 00h
Serial address
A6h
Byte address
16 = 10h
A valid OEM password is required for access to this register. This register is volatile and will not keep its value through power
cycles.
November 2009
62
M9999-111209-C
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