FXLS93421 datasheet(90/254 Pages) NXP

90 / 254 page

NXP Semiconductors

FXLS9xxxx

Dual channel inertial sensor

ARM_

DS[1]

ARM_

DS[0]

Down sampling

Provide every Sensor Data Request sample to the arming function for the relevant channel.

Provide every other Sensor Data Request sample to the arming function for the relevant channel.

Provide every fourth Sensor Data Request sample to the arming function for the relevant channel.

Provide every eighth Sensor Data Request sample to the arming function for the relevant channel.

Table 157. Arming function down sampling selection bits (ARM_DS[1:0])

11.2.28.2 Arming pulse stretch (ARM_PS[1:0])

The ARM_PS[1:0] bits set the programmable pulse stretch time for the arming outputs.

See Section 11.9 for more details regarding the arming function. Pulse stretch times are

derived from the internal oscillator, so the tolerance on this oscillator applies.

ARM_PS[1]

ARM_PS[0]

Pulse stretch time (typical oscillator)

0 ms

128.000 ms - 130.048 ms

512.000 ms - 514.048 ms

2048.000 ms - 2050.048 ms

Table 158. Arming pulse stretch (ARM_PS[1:0])

11.2.28.3 Arming window size (ARM_WS_N[1:0], A_WS_P[1:0])

The ARM_WS_N[1:0] and ARM_WS_P[1:0] bits have a different function depending on

the state of the ARM_CFG bits in the CHx_CFG_U4 registers. See Section 11.9 for more

details regarding the arming function. If the arming function is set to moving average

mode, the ARM_WS bits set the number of sensor samples used for the arming function

moving aver-age. The number of samples is set independently for each channel and

polarity. If the arming function is set to count mode, the ARM_WS bits set the sample

count limit for the arming function. The sample count limit is set independently for each

channel.

ARM_WS_P[1]

ARM_WS_P[0]

Positive window size

Table 159. Positive arming window size definitions (moving average mode)

ARM_WS_N[1]

ARM_WS_N[0]

Negative window size

Table 160. Negative arming window size definitions (moving average mode)

FXLS9xxxx

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 8 February 2021

90 / 254

FXLS93421 Datasheet(PDF) 90 Page - NXP Semiconductors

FXLS93421 Datasheet(HTML) 90 Page - NXP Semiconductors

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