MCP9902 datasheet(18/50 Pages) MICROCHIP

No. de pieza	MCP9902

Descripción Electrónicos	Multi-Channel Low-Temperature Remote Diode Sensor

PDF	50 Pages

Scroll/Zoom	100%

Fabricante Electrónico	MICROCHIP [Microchip Technology]

Página de inicio	http://www.microchip.com

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18 / 50 page

MCP9902/3/4

DS20005382C-page 18

 2015-2016 Microchip Technology Inc.

5.5

Alert Response Address

The ALERT/THERM2 output can be used as a

processor interrupt or as an SMBus Alert.

When it detects that the ALERT/THERM2 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 5-6.

The MCP9902/3/4 will respond to the ARA in the

following way:

• 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).

• Set the MASK_ALL bit to clear the

ALERT/THERM2 pin.

The ARA does not clear the Status Register and if the

MASK_ALL bit is cleared prior to the Status Register

being cleared, the ALERT/THERM2 pin will be

reasserted.

TABLE 5-6:

ALERT RESPONSE ADDRESS PROTOCOL

START

ALERT Response Address

ACK

Device Address

NACK

STOP

1 → 0

0001_100

YYYY_YYY

0 → 1

MCP9902 Datasheet(PDF) 18 Page - Microchip Technology