5.9 Summary of Power-on Default

The MCP9808 has an internal Power-on Reset (POR) circuit. If the power supply voltage, VDD, glitches below the VPOR threshold, the device resets the registers to the power-on default settings.

Table 5-10 shows the power-on default summary for the Temperature Sensor registers.

 

Table 5-10. Power-on Reset Defaults
RegistersDefault Register

Data (Hexadecimal)

Power-Up Default

Register Description

Address (Hexadecimal)Register Name
0x01CONFIG0x0000Comparator 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

0x02TUPPER0x00000°C
0x03TLOWER0x00000°C
0x04TCRIT0x00000°C
0x05TA0x00000°C
0x06Manufacturer ID0x00540x0054 (hex)
0x07Device ID/Device Revision0x04000x0400 (hex)
0x08Resolution0x030x03 (hex)