FXLS8964AF datasheet(32/98 Pages) NXP

32 / 98 page

NXP Semiconductors

FXLS8964AF

3-Axis Low-g Accelerometer

FXLS8964AF

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

Objective data sheet

Rev. 2 — 30 October 2020

32 / 98

Table 17. One-wire motion protocol threshold selections

Selection

Min pulse (µs)

Nom pulse (µs)

Max pulse (µs)

Upper threshold

counts (mg)

Lower threshold

counts (mg)

TPULSE-THRES0

(default)

—

64 (125)

–64 (–125)

TPULSE-THRES1

562.5

625

883

32 (62)

–32 (–62)

TPULSE-THRES2

1125

1250

1570

96 (187)

–96 (–187)

TPULSE-THRES3

2250

2500

2950

128 (250)

–128 (–250)

Note: Threshold mg values assume the default ±4 g FSR is used (sensitivity of 1.95 mg/

LSB, typical)

Figure 22. BOOT1 sequence (BT_MODE = GND)

Table 18. BOOT1 sequence description (BT_MODE = GND)

Protocol

phase

Description

VDD supply is not present (VDD < VDDmin); MCU and FXLS8964AF are both off; all IO pins are floating/high-z.

VDD ≥ VDDmin; MCU and FXLS8964AF are turned on; FXLS8964AF performs the BOOT sequence and

provides the BOOT_OUT output pulse for TPULSE-BOOT1 ms.

FXLS8964AF enters standby mode directly after the BOOT sequence.

When the MCU sends a serial command to set

SENS_CONFIG5[HIBERNATE_EN] bit to 1, FXLS8964AF

enters Hibernate mode. NOTE: The device enters into Hibernate mode 1us (typ) after the SPI_CS_B line is

de-asserted for the corresponding HIBERNATE_EN serial command.

To wake up the device from Hibernate mode, the MCU toggles the SPI_CS_B/WAKE UP pin (see TFLT-

WAKE_UP deglitch filter time for transition out of Hibernate mode); FXLS8964AF performs the BOOT sequence

and provides the BOOT_OUT output pulse for TPULSE-BOOT1 ms.

FXLS8964AF enters standby mode directly after the BOOT sequence.

When the MCU sends a serial command to set

SENS_ CONFIG1[ACTIVE] bit to 1, FXLS8964AF enters

active mode.

FXLS8964AF 数据表(PDF) 32 Page - NXP Semiconductors

FXLS8964AF 数据表(HTML) 32 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

数据表下载