EMC2113 datasheet(21/85 Pages) SMSC

Part #	EMC2113

Description	RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown

PDF	85 Pages

Scroll/Zoom	100%

Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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21 / 85 page

RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown

Datasheet

SMSC EMC2113

Revision 1.2 (10-08-09)

DATASHEET

5.2.7

Alert Response Address

The ALERT output can be used as a processor interrupt or as an SMBus Alert when configured to

operate as an interrupt.

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

to the general address of 0001_100b. All devices with active interrupts will respond with their slave

address as shown in Table 5.9.

The EMC2113 slave interface will respond to the ARA in the following way if the ALERT pin is asserted.

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.

Table 5.9 Alert Response Address Protocol

START

ALERT

RESPONSE

ADDRESS

ACK

DEVICE

ADDRESS

NACK

STOP

1 -> 0

0001_100

YYYY_YYY

0 -> 1

EMC2113 Datasheet(PDF) 21 Page - SMSC Corporation