FXLS93333 datasheet(167/254 Pages) NXP

167 / 254 page

NXP Semiconductors

FXLS9xxxx

Dual channel inertial sensor

• Four or eight consecutive Broadcast Read Commands are required following a

valid Background Diagnostic Mode command to complete a response transmission

(depending on the state of the BDM_FRAGSIZE bit).

• If any command other than the Broadcast Read Command is received, no response

is transmitted and the remainder of the Broadcast Read Command response is

terminated.

• The data to be transmitted in the response is latched just before the first symbol of the

background diagnostic mode response.

See Figure 77 for Background Diagnostic Mode timing.

12.4.4.3 Error checking

The error checking for Background Diagnostic Mode responses is the same as used for

Command and Response Mode, and described in Section 12.3.1.3.

12.4.5 DSI3 background diagnostic mode timing

An example timing diagram for background diagnostic mode is shown in Figure 77. In

this example, BDM_FRAGSIZE is set to '1' (4 bits). Timing parameters are specified in

Section 10.11.

PA[3:0]

CMD_start

tSTART_PDCM, PDCM_RSPST[12:0]

CMD[3:0]

ED[7:3]

CRC[3:0]

broadcast read

aaa-030661

broadcast read

BDM response data latched

tSTART_BDM

1-2-1

1-2-0

Figure 77. Background diagnostic mode timing diagram

12.4.6 DSI3 periodic data collection mode and background diagnostic mode

command summary

When periodic data collection mode is enabled, the background diagnostic mode

supports the register read command as described in the command and response mode

command summary, Section 12.3.4.1. The register write command is not supported in

background diagnostic mode.

FXLS9xxxx

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Product data sheet

Rev. 6 — 8 February 2021

167 / 254

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