 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
INA3221-Q1 Datasheet(PDF) 20 Page - Texas Instruments |
|
|
|
|||||||||||||||||||||||||||||
INA3221-Q1 Datasheet(HTML) 20 Page - Texas Instruments |
|
|
20 / 45 page  1 1 1 9 9 9 1 0 0 0 0 0 A0 R/W D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Frame 1: Two-Wire Slave Address Byte (1) Frame 2: Data MSByte Frame 3: Data LSByte Start By Master ACK By Device ACK By Device Stop By Master ACK By Device SCL SDA 1 1 9 9 1 0 0 0 0 0 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Frame 1: Two-Wire Slave Address Byte (1) Frame 2: Register Pointer Byte Start By Master ACK By Device ACK By Device Stop By Master SCL SDA 20 INA3221-Q1 SBOS776B – MARCH 2016 – REVISED MARCH 2016 www.ti.com Product Folder Links: INA3221-Q1 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated 8.5.2 Writing To and Reading From the INA3221-Q1 To access a specific INA3221-Q1 register, write the appropriate value to the register pointer. See Table 3 for a complete list of registers and corresponding addresses. The value for the register pointer, as shown in Figure 27, is the first byte transferred after the slave address byte with the R/W bit low. Every write operation to the INA3221-Q1 requires a register pointer value. (1) The value of the Slave Address Byte is determined by the A0 pin setting; see Table 1. Figure 27. Typical Register Pointer Set Register writes begin with the first byte transmitted by the master. This byte is the slave address, with the R/W bit low. The INA3221-Q1 then acknowledges receipt of a valid address. The next byte transmitted by the master is the register address that data are written to. This register address value updates the register pointer to the desired register. The next two bytes are written to the register addressed by the register pointer. The INA3221- Q1 acknowledges receipt of each data byte. The master terminates data transfer by generating a start or stop condition. When reading from the INA3221-Q1, the last value stored in the register pointer by a write operation determines which register is read during a read operation. To change the register pointer for a read operation, write a new value to the register pointer. This write is accomplished by issuing a slave address byte with the R/W bit low, followed by the register pointer byte. No additional data are required. The master then generates a start condition and sends the slave address byte with the R/W bit high to initiate the read command. The next byte is transmitted by the slave and is the most significant byte of the register indicated by the register pointer. This byte is followed by an acknowledge from the master; then the slave transmits the least significant byte. The master acknowledges receipt of the data byte. The master terminates data transfer by generating a not-acknowledge after receiving any data byte, or generating a start or stop condition. If repeated reads from the same register are desired, it is not necessary to continually send the register pointer bytes; the INA3221-Q1 retains the register pointer value until it is changed by the next write operation. Figure 28 and Figure 29 show the write and read operation timing diagrams, respectively. Note that register bytes are sent most-significant byte first, followed by the least significant byte. (1) The value of the slave address byte is determined by the A0 pin setting; see Table 1. Figure 28. Timing Diagram for Write Word Format |
Similar Part No. - INA3221-Q1 |
|
Similar Description - INA3221-Q1 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
