1.5°C SMBus Temperature Sensor in Miniature SOT-23

Datasheet

Revision 1.6 (01-29-07)

12

SMSC EMC1001

DATASHEET

Figure 4.4 THERM Response to THERM Limit Exceeded

4.5

Standby Mode

The EMC1001 can be set to standby mode (low power) by setting a bit in the Configuration Register

as described in Section 4.8 on page 13. This shuts down all internal analog functions while the SMBus

remains enabled. When the EMC1001 is in standby mode, a One-Shot command measurement can

be initiated. The user may also write new values to the limit registers described in Section 4.10 on

page 15 while in standby. If the previously stored temperature is outside any of the new limits, the

ALERT

respond as described in Section 4.4.

4.6

Register Allocation

The following registers shown in Table 4.3 are accessible through the SMBus:

Table 4.3 Register Map

REGISTER

ADDRESS

(HEX)

R/W

REGISTER NAME

POWER-ON DEFAULT

00

R

Temperature Value High Byte

0000 0000

01

R

Status

undefined

02

R

Temperature Value Low Byte

0000 0000

03

R/W

Configuration

0000 0000

04

R/W

Conversion Rate

0000 0100

05

R/W

Temperature High Limit High Byte

0101 0101 (85

06

R/W

Temperature High Limit Low Byte

0000 0000

07

R/W

Temperature Low Limit High Byte

0000 0000 (0

08

R/W

Temperature Low Limit Low Byte

0000 0000

0F

W

One-Shot

N/A

20

R/W

THERM Limit

0101 0101 (85

21

R/W

THERM Hysteresis

0000 1010 (10

22

R/W

SMBus Timeout Enable

0000 0001

FD

R

Product ID Register

0000 0000 (EMC1001)

0000 0001 (EMC1001-1)

FE

R

Manufacture ID

0101 1101

FF

R

Revision Number

0000 0011 Note 4.3

Temp

Time

THERM Limit

THERM Limit - THERM Hysterisis

THERM

THERM

Hysteresis

Logic High

Logic

Level