November 2004

13

MIC280

MIC280

Micrel

Local Temperature Result Register (TEMP0)

8-bits, read-only

Local Temperature Result 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

Temperature Data from ADC

Bit

Function

Operation

D[7:0]

Measured temperature data for the local zone.

Read only

Power-up default value:

Read command byte:

Each LSB represents one degree centigrade. The values are in a two’s complement binary format such that 0°C is reported

**TEMP0 will contain measured temperature data after the completion of one conversion.

Remote Temperature Result High-Byte Register (TEMP1h)

8-bits, read only

Remote Temperature Result High-Byte 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

Temperature Data from ADC

Bit

Function

Operation

D[7:0]

Measured temperature data for the remote zone, most significant byte.

Read only

Power-up default value:

Read command byte:

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.

TEMP1h can be read using either a Read_Byte operation or a Read_Word operation. Using Read_Byte will yield the 8-bit

value in TEMP1h. 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 guarantees that the data in both registers is from the

same temperature-to-digital conversion cycle. The Read_Word operation is diagramed in Figure 3. This is the only MIC280

register that supports Read_Word.

**TEMP1h will contain measured temperature data after the completion of one conversion.

Detailed Register Descriptions