MIC280-7BM6 TR【PDF 14/23 页】IC SUPERVISOR THERMAL SOT23-6

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Sheet目录45

10页 11页 12页 13页 [14页]15页 16页 17页 18页

MIC280

Micrel

MIC280

May 2006

Status Register (STATUS)

8-bits, read-only

Status Register

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

read-only

Bit(s)

Function

Operation*

Data ready

1 = data available

0 = ADC busy

Local high temperature event

1 = event occurred, 0 = none

Local low temperature event

1 = event occurred, 0 = none

Remote high temperature event

1 = event occurred, 0 = none

Remote low temperature event

1 = event occurred, 0 = none

Diode fault

1 = fault, 0 = none

Remote over-temperature event

1 = event occurred, 0 = none

Local over-temperature event

1 = event occurred, 0 = none

* All status bits are cleared after any read operation is performed on STATUS.

Power-up default value:

0000 0000

= 00

(no events pending)

Read command byte:

0000 0010

= 02

The power-up default value is 00h. Following the rst conversion, however, any of the status bits may be set depending on

the measured temperature results or the existence of a diode fault.

Conguration Register (CONFIG)

8-bits, read/write

Conguration Register

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

read/write

reserved

Interrupt

Shut-down

Fault Queue

Resolution

Reserved

Reset

Enable

(IE)

(SHDN)

(FQ[1:0])

(RES[1:0])

(RST)

Bits(s)

Function

Operation*

Interrupt enable

1 = interrupts enabled,

0 = disabled

SHDN

Selects operating mode: normal/shutdown

1 = shutdown, 0 = normal

FQ[1:0]

Depth of fault queue*

[00]=1, [01]=2, [10]=4, [11]=6

RES[1:0]

A/D converter resolution for external zone - affects conversion rate

[00]=9-bits, [01]=10-bits,

[10]=11-bits, [11]=12-bits

D[1]

Reserved

always write as zero!

RST

Resets all MIC280 functions and restores the power-up default state

write only; 1 = reset, 0 =

normal

operation; disabled by

setting L4

Power-up default value:

1000 0000

= 80

(Not in shutdown mode; Interrupts enabled;

Fault queue depth=1; Resolution = 9 bits)

Read/Write command byte:

0000 0011

= 03

* Any write to CONFIG will result in the fault queues being purged and reset and 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.

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