MIC280_06 Datasheet, PDF (18/23 Pages) Micrel Semiconductor – Precision IttyBitty Thermal Supervisor

MIC280
Micrel
Remote Temperature Result Low-Byte Register (TEMP1l)
8-bits, read only
Remote Temperature Result Low-Byte Register
D[7]
read-only
D[6]
read-only
D[5]
read-only
D[4]
read-only
D[3]
reserved
D[2]
reserved
D[1]
reserved
Temperature data from ADC, least significant bits
Reserved - always reads zero
D[0]
reserved
Bit
Function
Operation
D[7:4]
Measured temperature data for the remote zone, least significant bits.
Read only
D[3:0]
Reserved
Always reads as zeroes
Power-up default value:
0000 0000_b = 00_h (0°C)**
Read command byte:
0001 0000_b = 10_h
Each LSB represents one-sixteenth degree centigrade. The values are in a binary format such that 1/16th°C (0.0625°C) is
reported as 0001 0000_b. See Temperature Data Format (above) for more details.
TEMP1l can be accessed using a Read_Byte operation. However, the complete remote temperature result in both TEMP1h
and TEMP1l may be obtained by performing a Read_Word operation on TEMP1h. The MIC280 will respond to a Read_Word
with a command byte of 01h (TEMP1h) by returning the value in TEMP1h followed by the value in TEMP1l. This guaran-
tees that the data in both registers is from the same temperature-to-digital conversion cycle. The Read_Word operation is
diagramed in Figure 3. TEMP1h is the only MIC280 register that supports Read_Word.
**TEMP1l will contain measured temperature data after the completion of one conversion.
Remote Temperature High Limit Low-Byte Register (THIGH1l)
8-bits, read/write
Remote Temperature High Limit Low-Byte Register
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
reserved
D[2]
reserved
D[1]
reserved
High temperature limit for remote zone, least significant bits.
Reserved - always reads zero
D[0]
reserved
Bit
Function
Operation
D[7:4]
High temperature limit for the remote zone, least significant bits.
Read/write
D[3:0]
Reserved.
Always reads as zeros
Power-up default value:
0000 0000_b = 00_h (0°C)
Read/Write command byte: 0001 0011_b = 13_h
Each LSB represents one-sixteenth degree centigrade. The values are in a binary format such that 1/16th°C (0.0625°C) is
reported as 0001 0000_b. 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.
MIC280
18
May 2006