BQ76PL455APFCT datasheet(61/125 Pages) TI1

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bq76PL455A

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SLUSCL0A – SEPTEMBER 2016 – REVISED OCTOBER 2016

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With the exception described previously, formation of the Broadcast Write with Response command frames can

be in a similar fashion to the various configuration examples in the Group Write with Response,

Group_Write_With_Response Command Frame.

As with the Group Write with Response commands frames, Broadcast Write with Response command frames

can utilize one of two formats to indicate the address of the highest device to respond and the number of bytes

expected in response from each targeted device. One format uses one byte to specify both the address of the

highest board in the response chain and the number of desired response bytes. The other format uses two bytes

to specify the address of the highest responding device and the desired number of response bytes separately

(first the address, then the number of bytes-1).

The two command frames that follow provide an example of each format.

An example of the two-byte method (to read the Communication Configuration register):

Command Frame Init

110 (binary)

010 (binary)

Data (Address of highest responder)

Data (Number of response data bytes – 1)

CRC (MSB)

CRC (LSB)

For further details on how to interpret the data, refer to Register Details. A simplified overview of the meaning of

the data bytes in this example is in the following table.

BYTE (HEX)

BYTE (BINARY)

DESCRIPTION

11100010

Command frame, Broadcast Write with Response = REQ_TYPE, 8-bit Register

Addressing, 2 data bytes = DATA_SIZE

00010000

Target Register Address (Communication Configuration Register)

00000011

Address of highest (first) device to respond

00000001

Number of data bytes –1 expected in response (that is, 2 bytes)

11110110

CRC (MSB)

10001101

CRC (LSB)

An example of the one-byte method (to read the Communication Configuration register):

Command Frame Init

110 (binary)

001 (binary)

Data (Data Size and Address of highest

responder)

CRC (MSB)

CRC (LSB)

For further details on how to interpret the data, refer to Register Details. A simplified overview of the meaning of

the data bytes in this example is in the following table.

BYTE (HEX)

BYTE (BINARY)

DESCRIPTION

11100001

Command frame, Broadcast Write with Response = REQ_TYPE, 8-bit Register

Addressing, 1 data byte = DATA_SIZE

00010000

Target Register Address (Communication Configuration Register)

001 00010

Upper three bits are Number of Data Bytes – 1 expected in response, lower 5 bits is

address of highest device to respond

11011101

CRC

11101111

CRC

BQ76PL455APFCT Datasheet(PDF) 61 Page - Texas Instruments

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