EMC1403 データシートの表示（PDF） - Microchip Technology

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EMC1403

1°C Temperature Sensor with Beta Compensation

Microchip Technology 

4.6

1°C Temperature Sensor with Beta Compensation

Data Sheet

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

The EMC1403 and EMC1404 will respond to the ARA in the following way:

1. Send Slave Address and verify that full slave address was sent (i.e. the SMBus communication

from the device was not prematurely stopped due to a bus contention event).

2. Set the MASK bit to clear the ALERT pin.

APPLICATION NOTE: The ARA does not clear the Status Register and if the MASK bit is cleared prior to the Status

Register being cleared, the ALERT pin will be reasserted.

4.7

SMBus Address

The EMC1403 and EMC1404 respond to hard-wired SMBus slave address as shown in Table 1.1.

Note: Other addresses are available. Contact Microchip for more information.

4.8

SMBus Timeout

The EMC1403 and EMC1404 support SMBus Timeout. If the clock line is held low for longer than

30ms, the device will reset its SMBus protocol. This function can be enabled by setting the TIMEOUT

bit in the Consecutive Alert Register (see Section 6.12).

DS20005272A-page 16

 2014 Microchip Technology Inc.

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