PCA9541PW/03 NXP [NXP Semiconductors], PCA9541PW/03 Datasheet - Page 28

• 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
10.5 Bus initialization/recovery to initialize slaves without hardware reset
If the I
and Slave 2 in
PCA9541/03 disconnects the bus when it is reset via the hardware reset line, restoring the
master's control of the rest of the bus (for example, Slave 0). The bus master can then
command the PCA9541/03 to send 9 clock pulses/STOP condition to reset the
downstream I
downstream devices isolated.
Fig 21. Gatekeeper multiplexer application
Fig 22. Bus initialization/recovery application
2
C-bus is hung, I
MASTER
2
A
Z
C-bus devices before they are reconnected to the master or leave the
Figure
22) can be isolated from the master by the PCA9541/03. The
Rev. 05 — 1 October 2007
SLAVE 0
2
C-bus devices without a hardware reset pin (for example, Slave 1
B
Z
SDA/SCL
2-to-1 I
2
C-bus master selector with interrupt logic and reset
C
Z
PCA9541/03
RESET
D
Z
SDA
SCL
E
Z
SLAVE 1
SLAVE 2
F
Z
PCA9541
slave I
© NXP B.V. 2007. All rights reserved.
002aab616
G
Z
2
C-bus
002aab615
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H
Z