MIC280
Micrel
MIC280
20
May 2006
Local Over-Temperature Limit Register (CRIT0)
 8-bits, read/write
 
Local Over-Temperature Limit Register
 
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
 
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
 
Over-temperature limit for local zone.
 
Bit
Function
Operation
 
D[7:0]
Over-temperature limit for the local zone.
Read/write
 
Power-up default value:
0100 0110
b
 = 46
h
 (70癈)
 
Read/Write command byte:
0010 0000
b
 = 20
h
Each LSB represents one degree centigrade. The values are in a twos complement binary format such that 0癈 is reported
as 0000 0000
b
. SeeTemperature Data Format (above) for more details.
Any writes to a temperature limit register will result in the corresponding fault queue being purged and reset.
Manufacturer ID Register (MFG_ID)
8-bits, read only
 
Manufacturer ID Register
 
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
 
read only
read only
read only
read only
read only
read only
read only
read only
 
0
0
1
0
1
0
1
0
 
BIT(S)
FUNCTION 
Operation*
 
D[7:0]
Identies Micrel as the manufacturer of the device. Always returns 2A
h
.
Read only. Always returns
 
 
 
2A
h
 
Power-up default value:
0010 1010
b
  = 2A
h
 
 
Read command byte:    
1111 1110
b
  = FE
h
Die Revision Register (DIE_REV)
8-bits, read only
 
Die Revision Register
 
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
 
read-only
read-only
read-only
read-only
reserved
reserved
reserved
reserved
 
MIC280 DIE REVISION NUMBER
 
Bit(s)
Function
Operation*
 
D[7:0]
Identies the device revision number
Read only.
 
Power-up default value:
[Device revision number]
h
 
Read command byte:    
1111 1111
b
  = FF
h
 
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