MIC3003GFL datasheet(55/74 Pages) MICREL

55 / 74 page

Micrel, Inc.

MIC3003GFL

July 2010

M9999-072910-A

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

Bit(s)

Function

Operation

D[7-3]

Reserved

Read-only; these bits always return 00000.

D[2:0]

RESETOUT

Controls the reset output at pin 2

(QGPO) when Reset mode is

selected (OEMCFG3-7 set to 1)

By default, these three bits are 000, and the QGPO output

is undriven.

If RESET mode is selected in OEMCFG3:

When the three bits are written to 111, QGPO’s open-drain

output will be driven low for 125 μs (typical), after which

QGPO reenters the undriven state.

The RESETOUT field is cleared from 111 to 000 22.5 ms

(typical) after the de-assertion edge of QGPO. Other values

of this delay may be selected in the TRSTCLR[2:0] field in

OEMCFG2.

If Reset mode in OEMCFG3 is not selected, these three

bits have no function.

OEM Configuration Register 0 (OEMCFG0)

D[7]

RST

write only

D[6]

QGPOS

read/write

D[5]

DFLT

read-only

D[4]

reserved

D[3]

MODREF

reserved

D[2]

VAUX[2]

read/write

D[1]

VAUX[1]

read/write

D[0]

VAUX[0]

read/write

Default value

0000 0000b = 00h

Serial address

A6h

Byte address

00 = 00h

A write to OEMCFG0 will result in any A/D conversion in progress being aborted and the result discarded. The A/D will begin a

new conversion sequence once the write operation is complete.

All bits in OEMCFG0 are non-volatile except DFLT and RST. A valid OEM password is required for access to this register.

Bit(s)

Function

Operation

D[7]

RST

0 = no action; 1 = reset

Issuing a software reset by setting RST high is equivalent to

a full power cycle of the MIC3003.

D[6]

QGPOS

Determines the state of QGPO in

GPO mode

If OEMCFG3 bit 7 (QGPOM) is low, this bit determines

whether the QGPO output is high (undriven) or low (driven-

open-drain).

If QGPOM is high (Reset mode), this bit has no function

D[5]

DFLT

Diode fault flag.

1 = diode fault; 0 = OK.

D[4]

Output enable for SHDN, VMOD,

and VBIAS.

1 = enabled; 0 = hi-Z

D[3]

MODREF

Selects whether VMOD is

referenced to ground or VDD.

1 = VDD; 0 = GND

D[2:0]

VAUX[2:0]

Selects the voltage reported in

VINh:VINl.

000 = VIN

001 = VDDA

010 = VBIAS

011 = VMOD

100 = APCDAC

101 = MODDAC

110 = FLTDAC

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