MIC3003 datasheet(72/75 Pages) MICREL

72 / 75 page

Micrel, Inc.

MIC3003

November 2009

M9999-111209-C

hbwhelp@micrel.com or (408) 955-1690

Power-On Hour Meter Data (POHDATA)

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 values for all bytes when the MIC3003

is shipped

0000 0000b = 00h

Serial address

A6h

Byte addresses

32 – 34 and 36 - 38 = 20h - 22h and 24h - 26h

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

Weight

POHA, high-byte

POHA, low-byte

POHB, high-byte

POHB, low-byte

OEM Scratchpad Registers (SCRATCHn)

Default value

0000 0000b = 00h

Serial address

A6h

Byte addresses

136 - 207 (88 - CFh)

208 - 221 (D0 - DDh): 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 - FAh)

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.

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