Electronic Components Datasheet Search |
|
PCA9543A Datasheet(PDF) 5 Page - NXP Semiconductors |
|
PCA9543A Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 23 page PCA9543A_43B_43C_5 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 05 — 17 November 2008 5 of 23 NXP Semiconductors PCA9543A/43B/43C 2-channel I2C-bus switch with interrupt logic and reset 6. Functional description Refer to Figure 1 “Block diagram of PCA9543A/43B/43C”. 6.1 Device address Following a START condition, the bus master must output the address of the slave it is accessing. The address of the PCA9543A is shown in Figure 4. To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW. The last bit of the slave address defines the operation to be performed. When set to logic 1 a read is selected, while a logic 0 selects a write operation. The PCA9543B and PCA9543C are alternate address versions if needed for larger systems or to resolve address conflicts. The data sheet will reference the PCA9543A, but the PCA9543B and PCA9543C function identically except for the slave address. 6.2 Control register Following the successful acknowledgement of the slave address, the bus master will send a byte to the PCA9543A, which will be stored in the control register. If multiple bytes are received by the PCA9543A, it will save the last byte received. This register can be written and read via the I2C-bus. Fig 4. Slave address PCA9543A Fig 5. Slave address PCA9543B Fig 6. Slave address PCA9543C 002aab169 1 1 1 0 0 A1 A0 R/W fixed hardware selectable 002aab799 1 1 1 1 0 A1 A0 R/W fixed hardware selectable 002aab800 0 1 1 0 0 A1 A0 R/W fixed hardware selectable Fig 7. Control register 002aab181 X X INT 1 INT 0 X X B1 B0 channel selection bits (read/write) 76543210 interrupt bits (read only) channel 0 channel 1 INT0 INT1 |
Similar Part No. - PCA9543A |
|
Similar Description - PCA9543A |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |