MCP9804 Datasheet, PDF (33/54 Pages) Microchip Technology – ±0.25°C Typ. Accuracy Digital Temperature Sensor

5.3 Summary of Power-on Default
The MCP9804 has an internal Power-on Reset (POR)
circuit. If the power supply voltage V_DD glitches below
the V_POR threshold, the device resets the registers to
the power-on default settings.
Table 5-4 shows the power-on default summary for the
temperature sensor registers.
TABLE 5-4: POWER-ON RESET DEFAULTS
Registers
Address (Hexadecimal)
Register Name
Default Register
Data (Hexadecimal)
0x01
CONFIG
0x0000
0x02
0x03
0x04
0x05
0x06
0x07
0x08
T_UPPER
T_LOWER
T_CRIT
T_A
Manufacturer ID
Device ID/ Device Revision
Resolution
0x0000
0x0000
0x0000
0x0000
0x0054
0x0200
0x03
MCP9804
Power-up Default
Register Description
Comparator mode
Active-Low output
Alert and critical output
Output disabled
Alert not asserted
Interrupt cleared
Alert limits unlocked
Critical limit unlocked
Continuous conversion
0°C Hysteresis
0°C
0°C
0°C
0°C
0x0054 (hex)
0x0200 (hex)
0x03 (hex)
© 2009 Microchip Technology Inc.
DS22203A-page 33