MIC3003GFL datasheet(70/74 Pages) MICREL

70 / 74 page

Micrel, Inc.

MIC3003GFL

July 2010

M9999-072910-A

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

Bit(s)

Function

Operation

D[7]

A0h space access control

0: A0h space is used according to SFF-8472

1: A0h space does not respond to any access request. SMBus transactions to

A0h receive a NACK response.

D[6:5]

RXPWR Linearization Intervals

00: Temperature-based coefficient selection

01: Programmable delimiters

10: Hard coded delimiters

11: Reserved

Options 01 and 10 partition the receive power result range into eight regions,

each of which has its own slope and offset coefficients. The delimiters identify

the region boundaries within the 12-bit receive power range of results, and

may be either hard-coded (10) or programmable (01).

Use of hard-coded delimiters frees up extra A6 memory space for scratchpad

use.

D[4]

TXDISABLE debounce enable

/ disable

0: TXDISABLE is not debounced

1: TXDISABLE is debounced. Glitches less than 5 ms are rejected.

Set this bit to 1 if a mechanical switch is used for TXDISABLE. Set to 0 for

normal operation to assure compliance to the SFP MSA.

D[3]

RXLOS Polarity

0: The RXLOS output is low for normal operation and high with a loss of signal

condition.

1: The RXLOS output is high for normal operation (signal detected) and low

with a loss of signal (no signal detected) condition.

D[2]

RXLOS/TRSOUT Select

0: RXLOS is selected for output

1: TRRSOUT is selected for output

D[1]

Temperature resolution

0: Temperature is measured to a resolution of 1 ºC (eight-bit resolution)

1: Temperature is measured to a resolution of 0.5 ºC (nine-bit resolution)

D[0]

TXFAULT clear mode

0: TXFAULT remains set until TXDISABLE is toggled

1: TXFAULT is in continuous mode and follows the state of the faults

In continuous mode, the fault conditions asserting TXFAULT are not registered

and turn on and off According to the MIC3003’s operation.

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.

MIC3003GFL データシート(PDF) 70 Page - Micrel Semiconductor

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