MCP9844 datasheet(31/44 Pages) MICROCHIP

31 / 44 page

 2013 Microchip Technology Inc.

DS20005192A-page 31

MCP9844

5.3

Summary of Power-on Default

The MCP9844 has an internal Power-on Reset (POR)

circuit. If the power supply voltage VDD glitches down

to the VPOR_TS and VPOR_EE thresholds, the device

resets the registers to the power-on default settings.

Table 5-3 shows the power-on default summary for the

temperature sensor.

TABLE 5-3:

MCP9844 TEMPERATURE SENSOR POWER-ON RESET DEFAULTS

Registers

Default Register

Data (Hexadecimal)

Power-up Default

Address

(Hexadecimal)

0x00

Capability

0x00EF

Event output de-asserts in shutdown

I2C time out 25 ms to 35 ms.

Accepts VHV at A0 Pin

0.25°C Measurement Resolution

Measures temperature below 0°C

±1°C accuracy over active range

Temperature event output

0x01

CONFIG

0x0000

Comparator mode

Active-Low output

Event and critical output

Output disabled

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

—

0x07

Reserved

0x0601

—

0x08

Microchip

Device ID/ Device Revision

0x0601

—

0x09

Resolution

0x0001

Most Significant bit is set by default

0.25°C Measurement Resolution

MCP9844 bảng dữ liệu(PDF) 31 Page - Microchip Technology

MCP9844 bảng dữ liệu(HTML) 31 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

bảng dữ liệu tải về

Link URL