EMC1204(2006) Ver la hoja de datos (PDF) - SMSC -> Microchip

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EMC1204
(Rev.:2006)

Triple/Quad Single-Wire Temp Sensor in MSOP-8 Using SMSC BudgetBus™ Sensor Interface

SMSC -> Microchip 

Triple/Quad Single-Wire Temp Sensor in MSOP-8 Using SMSC BudgetBusTM Sensor Interface

Datasheet

3.4

Temperature Data Format

Temperature readings are coded in 2’s complement format with a -64ºC offset. This format spans from

–63.875ºC to +191.875ºC with 0.125ºC resolution. A temperature measurement outside this range is

reported as either –63.875ºC or +191.875ºC. The host must add 64ºC to calculate the actual

temperature. Table 3.1 shows example temperature readings and the value that will be reported on the

BBUS.

Table 3.1 Temperature Data Format

ACTUAL TEMP.

(ºC)

Diode Fault

-63.875

2’S COMPLEMENT

OF -64ºC OFFSET

100 0000 0000

100 0000 0001

HEX

400

401

-63.000

100 0000 1000

408

-1.000

101 1111 1000

5F8

0.000

110 0000 0000

600

+0.125

110 0000 0001

601

+1.000

110 0000 1000

608

3.5

As shown in Table 3.1, 400h is reserved for diode fault signaling which occurs when open or short

conditions are detected between the external DP and DN pins.

Conversion Rate

The conversion rate can be controlled by the host. This is accomplished by periodically placing the

device in standby as described in Section 3.3.

SMSC EMC1203/EMC1204

7

DATASHEET

Revision 1.1 (06-12-06)

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