BQ25713 datasheet(41/111 Pages) TI2

41 / 111 page

START (S)

STOP (P)

SDA

SCL

SDA

SCL

Figure 8-9. START and STOP Conditions

8.5.1.4 Byte Format

Every byte on the SDA line must be 8 bits long. The number of bytes to be transmitted per transfer is

unrestricted. Each byte has to be followed by an Acknowledge bit. Data is transferred with the Most Significant

Bit (MSB) first. If a target cannot receive or transmit another complete byte of data until it has performed some

other function, it can hold the clock line SCL low to force the host into a wait state (clock stretching). Data

transfer then continues when the target is ready for another byte of data and release the clock line SCL.

SCL

SDA

START or

Repeated

START

S or Sr

MSB

ACK

Acknowledgement

signal from slave

ACK

Acknowledgement

signal from receiver

STOP or

Repeated

START

P or Sr

Figure 8-10. Data Transfer on the I2C Bus

8.5.1.5 Acknowledge (ACK) and Not Acknowledge (NACK)

The acknowledge takes place after every byte. The acknowledge bit allows the receiver to signal the transmitter

that the byte was successfully received and another byte may be sent. All clock pulses, including the

acknowledge 9th clock pulse, are generated by the host.

The transmitter releases the SDA line during the acknowledge clock pulse so the receiver can pull the SDA line

LOW and it remains stable LOW during the HIGH period of this clock pulse.

When SDA remains HIGH during the 9th clock pulse, this is the Not Acknowledge signal. The host can then

generate either a STOP to abort the transfer or a repeated START to start a new transfer.

8.5.1.6 Target Address and Data Direction Bit

After the START, a target address is sent. This address is 7 bits long followed by the eighth bit as a data

direction bit (bit R/W). A zero indicates a transmission (WRITE) and a one indicates a request for data (READ).

SCL

SDA

START

1-7

ACK

1-7

ACK

1-7

STOP

ADDRESS

R/W

DATA

ACK

DATA

Figure 8-11. Complete Data Transfer

www.ti.com

BQ25730

SLUSE65A – FEBRUARY 2021 – REVISED JANUARY 2024

Submit Document Feedback

Product Folder Links: BQ25730

BQ25713 Datasheet(PDF) 41 Page - Texas Instruments

BQ25713 Datasheet(HTML) 41 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL