MIC280_06 Datasheet, PDF (17/23 Pages) Micrel Semiconductor – Precision IttyBitty Thermal Supervisor

MIC280
Micrel
D[7]
read/write
Remote Temperature Low Limit High-Byte Register (TLOW1h)
8-bits, read/write
Remote Temperature Low Limit High-Byte Register
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
Low temperature limit for remote zone, most significant byte.
D[0]
read/write
Bit
Function
Operation
D[7:0]
Low temperature limit for the remote zone, most significant byte.
Read/write
Power-up default value:
0000 0000_b = 00_h (0°C)
Read/Write command byte: 0000 1000_b = 08_h
Each LSB represents one degree centigrade. The values are in a two’s complement binary format such that 0°C is reported
as 0000 0000b. See Temperature Data Format (above) for more details.
Any writes to a temperature limit register will result in the corresponding fault queue being purged and reset.
D[7]
reserved
D[6]
reserved
Reserved
D[5]
reserved
Security Register (LOCK)
8-bits, write once
Security Register
D[4]
read/
write-once
D[3]
read/
write-once
D[2]
read/
write-once
L4
L3
L2
D[1]
read/
write-once
L1
D[0]
read/
write-once
L0
Bit
Function
Operation*
D[7:5]
Reserved
Always write as zero
L4
Warm reset lockout bit
1 = RST bit disabled;
0 = unlocked
L3
Shutdown mode lockout bit*
1= shutdown disabled;
0 = unlocked
L2
Diode fault event lock bit
1 = locked, 0 = unlocked
L1
Remote over-temperature event lock bit
1 = locked, 0 = unlocked
L0
Local over-temperature event lock bit
1 = locked, 0 = unlocked
Power-up default value:
Read/Write command byte:
0000 0000_b = 00_h (All events unlocked)
0000 1001_b = 09_h
* If the chip is �
re-enter shutdown mode.
May 2006
17
MIC280