MCP9805-BESLASHST datasheet(19/34 Pages) MICROCHIP

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DS21977B-page 19

MCP9805

4.3

Summary of Power-up Default

The MCP9805 has an internal Power-on Reset (POR)

circuit. If the power supply voltage VDD drifts below the

VPOR threshold, the device resets the registers to the

power-up default settings.

Table 4-6 shows the power-up default summary.

TABLE 4-6:

POWER-UP DEFAULTS

Registers

Default Register

Data (Hex)

Power-up Default

Address (Hex)

0x00

Capability

0x000F

0.25 °C/LSb

Measures Temperature Below 0°C

±1°C Accuracy Over Active Range

Basic Capability (Event output)

0x01

CONFIG

0x0000

Comparator Mode

Active-Low Output

Event and Critical output

Output Enabled

Event Not Asserted

Interrupt Cleared

Event Limits Unlocked

Critical Limit Unlocked

Continuous Conversion

0°C Hysteresis

0x02

TUPPER

0x0000

0°C

0x03

TLOWER

0x0000

0°C

0x04

TCRIT

0x0000

0°C

0x05

0x0000

0°C

0x06

Manufacturer ID

0x0054

0x0054 (hex)

0x07

Device ID/Device Revision

0x0000

0x0000 (hex)

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