Moteur de recherche de fiches techniques de composants électroniques |
|
TCA9548APWR Fiches technique(PDF) 3 Page - Texas Instruments |
|
|
TCA9548APWR Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 22 page TCA9548A www.ti.com SCPS207A – MAY 2012 – REVISED JULY 2012 TERMINAL FUNCTIONS NO. NAME DESCRIPTION TSSOP (PW) QFN (RTW) 1 22 A0 Address input 0. Connect directly to VCC or ground. 2 23 A1 Address input 1. Connect directly to VCC or ground. 3 24 RESET Active-low reset input. Connect to VCC through a pull-up resistor, if not used. 4 1 SD0 Serial data 0. Connect to VCC through a pull-up resistor. 5 2 SC0 Serial clock 0. Connect to VCC through a pull-up resistor. 6 3 SD1 Serial data 1. Connect to VCC through a pull-up resistor. 7 4 SC1 Serial clock 1. Connect to VCC through a pull-up resistor. 8 5 SC2 Serial data 2. Connect to VCC through a pull-up resistor. 9 6 SC2 Serial clock 2. Connect to VCC through a pull-up resistor. 10 7 SD3 Serial data 3. Connect to VCC through a pull-up resistor. 11 8 SC3 Serial clock 3. Connect to VCC through a pull-up resistor. 12 9 GND Ground 13 10 SD4 Serial data 4. Connect to VCC through a pull-up resistor. 14 11 SC4 Serial clock 4. Connect to VCC through a pull-up resistor. 15 12 SD5 Serial data 5. Connect to VCC through a pull-up resistor. 16 13 SC5 Serial clock 5. Connect to VCC through a pull-up resistor. 17 14 SD6 Serial data 6. Connect to VCC through a pull-up resistor. 18 15 SC6 Serial clock 6. Connect to VCC through a pull-up resistor. 19 16 SD7 Serial data 7. Connect to VCC through a pull-up resistor. 20 17 SC7 Serial clock 7. Connect to VCC through a pull-up resistor. 21 18 A2 Address input 2. Connect directly to VCC or ground. 22 19 SCL Serial clock bus. Connect to VCC through a pull-up resistor. 23 20 SDA Serial data bus. Connect to VCC through a pull-up resistor. 24 21 VCC Supply voltage I 2C Interface The bidirectional I2C bus consists of the serial clock (SCL) and serial data (SDA) lines. Both lines must be connected to a positive supply through a pullup resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy. I2C communication with this device is initiated by a master sending a start condition, a high-to-low transition on the SDA input/output while the SCL input is high (see Figure 1). After the start condition, the device address byte is sent, most significant bit (MSB) first, including the data direction bit (R/W). After receiving the valid address byte, this device responds with an acknowledge (ACK), a low on the SDA input/output during the high of the ACK-related clock pulse. The address inputs (A0–A2) of the slave device must not be changed between the start and the stop conditions. On the I2C bus, only one data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the high pulse of the clock period, as changes in the data line at this time are interpreted as control commands (start or stop) (see Figure 2). A stop condition, a low-to-high transition on the SDA input/output while the SCL input is high, is sent by the master (see Figure 1). Any number of data bytes can be transferred from the transmitter to receiver between the start and the stop conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before the receiver can send an ACK bit. The device that acknowledges must pull down the SDA line during the ACK clock pulse so that the SDA line is stable low during the high pulse of the ACK-related clock period (see Figure 3). When a slave receiver is addressed, it must generate an ACK after each byte is received. Similarly, the master must generate an ACK after each byte that it receives from the slave transmitter. Setup and hold times must be met to ensure proper operation. Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TCA9548A |
Numéro de pièce similaire - TCA9548APWR |
|
Description similaire - TCA9548APWR |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |