MIC3000BML datasheet(59/68 Pages) MICREL

59 / 68 page

October 2004

M9999-101204

MIC3000

Micrel

OEM Readback Register (OEMRD)

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

INT

APCSAT

IBFLT

TXFLT

RSOUT

reserved

read only

Default Value

0000 0000b = 00h

Serial Address

A6h = 1010011b

Byte Address

22 = 16h

This register reflects (reads back) the status of the bits corresponding to the parameters defined below. A valid OEM

password is required for access to this register. Otherwise, reads are undefined and writes are ignored.

Bit

Function

Operation

D[7:5]

Reserved

Always write as zero; reads undefined.

D[4]

INT

Mirrors state of /INT but active-high; not state of

1 = interrupt; 0 = no interrupt.

physical pin!

D[3]

APCSAT

APC saturation fault comparator output state

1 = fault; 0 = normal operation.

D[2]

IBFLT

State of IBIAS over-current fault comparator

1 = fault; 0 = normal operation; read-only.

output

D[1]

TXFLT

State of transmit power fault comparator output

1 = fault; 0 = normal operation; read-only.

D[0]

RSOUT

State of the rate select output pin, RSOUT

1 = high; 0 = low; Read-only.

Power-On Hour Meter Data (POHDATA)

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

read/write

Default Value

0000 0000b = 00h

Serial Address

A6h = 1010011b

Byte Address

32-39 = 20h - 27h

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 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 = 1010011b

Byte Address

SCRATCH0:

126 = 7Eh

SCRATCH1:

127 = 7Fh

SCRATCH2:

128 = 80h

.......................................

SCRATCH127: 253 = FDh

The scratchpad registers are general-purpose non-volatile memory locations. They can be freely read from and written

to any time the MIC3000 is in OEM mode.

MIC3000BML Datasheet(PDF) 59 Page - Micrel Semiconductor

MIC3000BML Datasheet(HTML) 59 Page - Micrel Semiconductor

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