MCP9808 datasheet(29/52 Pages) MICROCHIP

tên linh kiện	MCP9808

Giải thích chi tiết về linh kiện	짹0.5째C Maximum Accuracy Digital Temperature Sensor

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nhà sản xuất	MICROCHIP [Microchip Technology]

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DS25095A-page 29

MCP9808

5.1.6

RESOLUTION REGISTER

This register allows the user to change the sensor

resolution

(see

Section 5.2.4

“Temperature

Resolution”).

The

POR

default

resolution

+0.0625°C. The selected resolution is also reflected in

the Capability register (see Register 5-2).

FIGURE 5-8:

Timing Diagram for Changing TA Resolution to +0.0625°C <0000 0011>b (see

Section 4.0 “Serial Communication”).

RESOLUTION REGISTER (

→ ADDRESS ‘0000 1000’b)

U-0

R/W-1

—

Resolution

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-2

Unimplemented: Read as ‘0’

bit 1-0

Resolution bits

= +0.5°C (tCONV = 30 ms typical)

= +0.25°C (tCONV = 65 ms typical)

= +0.125°C (tCONV = 130 ms typical)

= +0.0625°C (power-up default, tCONV = 250 ms typical)

SDA

001

123

345

SCL

Address Byte

MCP9808

567

Data

Resolution Pointer

MCP9808

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