MCP9800 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

MCP9800

2-Wire High-Accuracy Temperature Sensor

Microchip Technology 

MCP9800/1/2/3

5.3.2

SENSOR CONFIGURATION

REGISTER (CONFIG)

The MCP9800/1/2/3 has an 8-bit read/write

Configuration register that allows the user to select the

different features. These features include shutdown,

ALERT output select as comparator or interrupt output,

ALERT output polarity, fault queue cycle, temperature

measurement resolution and One-shot mode (single

conversion while in shutdown). These functions are

described in detail in the following sections.

REGISTER 5-3: CONFIGURATION REGISTER (CONFIG) – ADDRESS <0000 0001>b

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

One-Shot

Resolution

Fault Queue

ALERT

Polarity

COMP/INT

bit 7

R/W-0

Shutdown

bit 0

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

bit 5-6

bit 3-4

bit 2

bit 1

bit 0

ONE-SHOT bit

1 = Enabled

0 = Disabled (Power-up default)

 ADC RESOLUTION bits

00 = 9 bit or 0.5°C (Power-up default)

01 = 10 bit or 0.25°C

10 = 11 bit or 0.125°C

11 = 12 bit or 0.0625°C

FAULT QUEUE bits

00 = 1 (Power-up default)

01 = 2

10 = 4

11 = 6

ALERT POLARITY bit

1 = Active-high

0 = Active-low (Power-up default)

COMP/INT bit

1 = Interrupt mode

0 = Comparator mode (Power-up default)

SHUTDOWN bit

1 = Enable

0 = Disable (Power-up default)

DS21909D-page 18

 2010 Microchip Technology Inc.

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