PCA9541PW/03 NXP [NXP Semiconductors], PCA9541PW/03 Datasheet - Page 26

• Manufacturer Part Number: PCA9541PW/03
• Description: 2-to-1 I2C-bus master selector with interrupt logic and reset
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA9541_5
Product data sheet
10.2 High reliability systems
In a typical multipoint application, shown in
primary and back-up) are located on separate I
downstream I
or the PCA9541/02 for hot swap applications to provide high reliability of the I
I
command of the I
the other master is disabled or removed from the system. The failed master is isolated
from the system and will not affect communication between the on-line master and the
slave devices located on the cards.
For even higher reliability in multipoint backplane applications, two dedicated masters can
be used for every card as shown in
2
Fig 18. High reliability backplane application
Fig 19. Very high reliability backplane application
C-bus commands are sent via the primary or back-up master and either master can take
2
C-bus slave cards/devices via a PCA9541/01 for non-hot swap applications
SCL0
SDA0
2
C-bus. Either master at any time can gain control of the slave devices if
Rev. 05 — 1 October 2007
SCL0
SDA0
SCL0
SDA0
SCL0
SDA0
SCL0
SDA0
2-to-1 I
2
C-bus master selector with interrupt logic and reset
Figure
19.
Figure
2
C-buses that connect to multiple
18, the two masters (for example,
SCL1
SDA1
SCL1
SDA1
SCL1
SDA1
SCL1
SDA1
002aab613
SDA1
SCL1
PCA9541
© NXP B.V. 2007. All rights reserved.
002aab612
2
C-bus.
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