BQ76PL455APFCR datasheet(57/125 Pages) TI1

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bq76PL455A

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SLUSCL0A – SEPTEMBER 2016 – REVISED OCTOBER 2016

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NOTE

For the following configuration examples, assume a daisy chain of four devices with

addresses 00–03 in which devices at address 01 and address 02 belong to Group ID 01,

and the devices at address 00 and address 03 belong to Group ID 00.

7.5.3.3.1

Configuration 1: Group Write with Response to Command Register with Sampling Parameters Included in

Command Frame

In response to the command frame in this example, each bq76PL455A in the specified group will write the new

sample parameters into the CHANNELS and OVERSMPL registers, sample the channels identified in the data

parameters, store the results, and send a response frame containing the sample data. In this example, the user

expects two complete response frames, since there are two devices in the addressed group.

Command Frame Init

010 (binary)

110 (binary)

Group ID

Data (Command)

Data (Channel Select MSB)

Data (Channel Select)

Data (Channel Select LSB)

Data (Averaging Setting)

CRC (MSB)

CRC (LSB)

For details on how to read the response, 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

1 010 0 110

Command frame, Group Write with Response = REQ_TYPE, 8-bit Register Addressing, 6 data

bytes = DATA_SIZE

00000001

Target is Group ID = 01

00000010

Target Register = 02 (Command Register)

000 00010

Upper three bits define Command sent to Command register, lower 5 bits is address of

highest device in group to respond

11111111

Select Channels 16 to 9

11111111

Select Channels 8 to 1

01010101

Select AUX6, AUX4, AUX2 and AUX0

00000000

Do not select temperature or additional channels

00000000

No averaging

00000100

CRC

01011001

CRC

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