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PCA9541BS/03 bảng dữ liệu(PDF) 25 Page - NXP Semiconductors

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Giải thích chi tiết về linh kiện  2-to-1 I2C-bus master selector with interrupt logic and reset
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PCA9541_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 1 October 2007
25 of 43
NXP Semiconductors
PCA9541
2-to-1 I2C-bus master selector with interrupt logic and reset
10. Application design-in information
10.1 Specific applications
The PCA9541 is a 2-to-1 I2C-bus master selector designed for dual master, high reliability
I2C-bus applications, where continuous maintenance and control monitoring is required
even if one master fails or its controller card is removed for maintenance. The PCA9541
can also be used in other applications, such as where masters share the same resource
but cannot share the same bus, as a gatekeeper multiplexer in long single bus
applications or as a bus initialization/recovery device.
Fig 17. Typical application
PCA9541
SCL_MST0
SDA_MST0
INT0
3.3 V
MASTER 0
002aab611
SCL0
SDA0
INT0
INT_IN
A3
A2
A1
VDD
A0
VSS
VDD
RESET0
VSS
SLAVE 1
SDA
SCL
SLAVE 2
SDA
SCL
INT
SLAVE 3
SDA
SCL
SDA_SLAVE
SCL_SLAVE
SCL_MST1
SDA_MST1
INT1
3.3 V
MASTER 1
SCL1
SDA1
INT1
VDD
RESET1
VSS
RESET
SLAVE CARD



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