PCA9541BS/0X-T Not available Not available PCA9544ABS-T Package Container PCA9545A PCA9546A PCA9547 PCA9548A PCA9549 Tube PCA9545AD PCA9546AD PCA9547D PCA9548AD PCA9549D SO T & R PCA9545AD-T PCA9546AD-T PCA9547D-T PCA9548AD-T PCA9549D-T TSSOP Tube PCA9545APW PCA9546APW PCA9547PW PCA9548APW PCA9549PW T &
condition, the bus master must output the address of the slave it is accessing. The address of the PCA9548A is shown in Figure 5. To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW.
1 1 1 0 A2 A1 A0 R/W
fixed
hardware
application # of Channels Standard w/Interrupt Logic 2 PCA9540 PCA9542/43 4 PCA9546 PCA9544/45 8 PCA9548 DesignCon 2003 TecForum I C Bus Overview 51 DesignCon 2003 TecForum I C Bus Overview 49 Slide 49 Slide 51 2 The I C specification limits the maximum capacitive In this application, 4 identical cards
SCL SCL FF OpenDrain Fig6.2(d) Using GPIO-ports Case5: Using I2C bus switch IC. Ex. PCA9545(4ch) , PCA9548(8ch) (multiple D6T sensors) 5V VCC R R D6T SDA SDA 0 SCL SCL 0 GND SDA 1 I2C bus switch SCL 1 : VDD SDA 2 VCC SCL 2 R R R R D6T MCU SDA SDA x SDA SCL SCL x SCL GND GND Fig6.2(e) Using I2C bus switch
not happen. 2 The PCA9548 uses I C commands to activate and deactivate the downstream channels. The channel does not shift until the STOP command is sent by the master and the switch acts only as a wire and does not regenerate
not happen. 2 The PCA9548 uses I C commands to activate and deactivate the downstream channels. The channel does not shift until the STOP command is sent by the master and the switch acts only as a wire and does not regenerate
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