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MCP9902 데이터시트(PDF) 18 Page - Microchip Technology

부품명 MCP9902
상세설명  Multi-Channel Low-Temperature Remote Diode Sensor
PDF  50 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP9902 데이터시트(HTML) 18 Page - Microchip Technology

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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
RD
ACK
Device Address
NACK
STOP
1 → 0
0001_100
1
0
YYYY_YYY
1
0 → 1



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