EMC1402-1-ACZL-TR View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

EMC1402-1-ACZL-TR

1°C Temperature Sensor with Beta Compensation

SMSC -> Microchip 

1°C Temperature Sensor with Beta Compensation

Datasheet

4.3

Read Byte

The Read Byte protocol is used to read one byte of data from the registers as shown in Table 4.3.

Table 4.3 Read Byte Protocol

START

SLAVE

ADDRESS

WR ACK

1 -> 0 1001_100 0 1

REGISTER

ADDRESS

XXh

ACK START

SLAVE

ADDRESS

RD ACK

0 1 -> 0 1001_100 1 1

REGISTER

DATA

XX

NACK STOP

1 0 -> 1

4.4

Send Byte

The Send Byte protocol is used to set the internal address register pointer to the correct address

location. No data is transferred during the Send Byte protocol as shown in Table 4.4.

START

1 -> 0

SLAVE

ADDRESS

1001_100

Table 4.4 Send Byte Protocol

REGISTER

WR

ACK

ADDRESS

0

0

XXh

ACK

0

STOP

0 -> 1

4.5

Receive Byte

The Receive Byte protocol is used to read data from a register when the internal register address

pointer is known to be at the right location (e.g. set via Send Byte). This is used for consecutive reads

of the same register as shown in Table 4.5.

START

1 -> 0

SLAVE

ADDRESS

1001_100

Table 4.5 Receive Byte Protocol

RD

ACK

REGISTER DATA

NACK

1

0

XXh

1

STOP

0 -> 1

4.6

Alert Response Address

The ALERT output can be used as a processor interrupt or as an SMBus Alert.

When it detects that the ALERT pin is asserted, the host will send the Alert Response Address (ARA)

to the general address of 0001_100xb. All devices with active interrupts will respond with their client

address as shown in Table 4.6.

START

1 -> 0

Table 4.6 Alert Response Address Protocol

ALERT

RESPONSE

ADDRESS

0001_100

DEVICE

RD

ACK

ADDRESS

1

0

1001_1000

NACK

1

STOP

0 -> 1

SMSC EMC1402

13

DATASHEET

Revision 2.0 (08-10-12)

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