MIC280 MICREL [Micrel Semiconductor], MIC280 Datasheet - Page 17

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

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.
November 2004
read/write
reserved
* If the chip is shutdown when L3 is set, the chip will exit shutdown mode and resume normal operation. It will not be possible to subsequently
D[7]
D[7:0]
D[7]
D[7:5]
re-enter shutdown mode.
Bit
Bit
L4
L3
L2
L1
L0
Power-up default value:
Read/Write command byte:
Power-up default value:
Read/Write command byte:
Function
Low temperature limit for the remote zone, most significant byte.
Function
Reserved
Warm reset lockout bit
Shutdown mode lockout bit*
Diode fault event lock bit
Remote over-temperature event lock bit
Local over-temperature event lock bit
read/write
Reserved
reserved
D[6]
D[6]
Remote Temperature Low Limit High-Byte Register (TLOW1h)
read/write
Low temperature limit for remote zone, most significant byte.
reserved
Remote Temperature Low Limit High-Byte Register
D[5]
D[5]
write-once
Security Register (LOCK)
read/write
0000 0000
0000 1000
0000 0000
0000 1001
read/
D[4]
D[4]
L4
8-bits, write once
8-bits, read/write
Security Register
b
b
b
b
17
= 00
= 08
= 00
= 09
write-once
read/write
read/
D[3]
D[3]
h
h
L3
h
h
(0°C)
(All events unlocked)
write-once
read/write
read/
D[2]
D[2]
L2
Operation
Read/write
Operation*
Always write as zero
1 = RST bit disabled;
0 = unlocked
1= shutdown disabled;
0 = unlocked
1 = locked, 0 = unlocked
1 = locked, 0 = unlocked
1 = locked, 0 = unlocked
write-once
read/write
read/
D[1]
D[1]
L1
write-once
read/write
read/
D[0]
D[0]
L0
MIC280