MIC280 MICREL [Micrel Semiconductor], MIC280 Datasheet - Page 14

• Manufacturer Part Number: MIC280
• Description: Precision IttyBitty Thermal Supervisor
• Manufacturer: MICREL [Micrel Semiconductor]

The power-up default value is 00h. Following the first conversion, however, any of the status bits may be set depending on
the measured temperature results or the existence of a diode fault.
MIC280
read/write
read-only
Interrupt
Enable
RES[1:0]
FQ[1:0]
* All status bits are cleared after any read operation is performed on STATUS.
Bits(s)
* 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
SHDN
D[7]
Bit(s)
D[7]
(IE)
S7
RST
D[1]
discarded. The A/D will begin a new conversion sequence once the write operation is complete.
S7
S6
S5
S4
S3
S2
S1
S0
IE
Power-up default value:
Read command byte:
Power-up default value:
Read/Write command byte:
Function
Data ready
Local high temperature event
Local low temperature event
Remote high temperature event
Remote low temperature event
Diode fault
Remote over-temperature event
Local over-temperature event
Shut-down
Function
Interrupt enable
Selects operating mode: normal/shutdown
Depth of fault queue*
A/D converter resolution for external zone - affects conversion rate
Reserved
Resets all MIC280 functions and restores the power-up default state
read/write
read-only
(SHDN)
D[6]
D[6]
S6
read-only
reserved
D[5]
D[5]
S5
Fault Queue
(FQ[1:0])
Configuration Register (CONFIG)
Status Register (STATUS)
read-only
reserved
0000 0000
0000 0010
1000 0000
Fault queue depth=1; Resolution = 9 bits)
0000 0011
Configuration Register
D[4]
D[4]
S4
8-bits, read-only
8-bits, read/write
Status Register
b
b
b
b
14
= 03
= 80
= 00
= 02
read-only
reserved
D[3]
D[3]
h
S3
h
h
h
(Not in shutdown mode; Interrupts enabled;
(no events pending)
Resolution
(RES[1:0])
read-only
reserved
D[2]
D[2]
S2
Operation*
1 = interrupts enabled,
0 = disabled
1 = shutdown, 0 = normal
[00]=1, [01]=2, [10]=4, [11]=6
[00]=9-bits, [01]=10-bits,
[10]=11-bits, [11]=12-bits
always write as zero!
write only; 1 = reset, 0 =
normal
operation; disabled by
setting L4
Operation*
1 = data available
0 = ADC busy
1 = event occurred, 0 = none
1 = event occurred, 0 = none
1 = event occurred, 0 = none
1 = event occurred, 0 = none
1 = fault, 0 = none
1 = event occurred, 0 = none
1 = event occurred, 0 = none
Reserved
read-only
reserved
D[1]
D[1]
S1
November 2004
read-only
reserved
Reset
(RST)
D[0]
D[0]
S0