VL6180 datasheet(18/73 Pages) STMICROELECTRONICS

18 / 73 page

Functional description

VL6180

18/73

DocID024986 Rev 14

VL6180x_RangeConfigInterrupt()

The VL6180 can be configured to generate a range interrupt flag under any of the following

conditions:



New sample ready



Level low (range value < low threshold)



Level high (range value > high threshold)



Out of window (range value < low threshold) OR (range value > high threshold)

In new sample ready mode, an interrupt flag will be raised at the end of every measurement

irrespective of whether the measurement is valid or if an error has occurred. This mode is

particularly useful during development and debug.



In level interrupt mode the system will raise an interrupt flag if either a low or high

programmable threshold has been crossed.



Out of window interrupt mode activates both high and low level thresholds allowing a

window of operation to be specified.

Range interrupt modes are selected via VL6180x_RangeConfigInterrupt() with

VL6180x_RangeSetThresholds() used to set thresholds. Use

VL6180x_RangeGetInterruptStatus() to return the ranging interrupt status.

Note:

In level or window interrupt modes range errors will only trigger an interrupt if the logical

conditions described above are met.

Continuous mode limits

To take account of oscillator tolerances and internal processing overheads it is necessary to

place the following constraints on continuous mode operations. The following equations

define the minimum inter-measurement period to ensure correct operation:

Continuous range:

VL6180x_RangeSetMaxConvergenceTime() + 5

 

VL6180x_RangeSetInterMeasPeriod() * 0.9

Table 6. gives an example how to apply these limits in continuous mode operating at a

sampling rate of 10 Hz.

2.5.3

Asynchronous mode - single shot measurement

Host requests a single shot measurement and can either check regularly to see if result is

ready or wait for an interrupt then call RangeGetMeasurementIfReady().

Table 6. Continuous mode limits (10 Hz operation)

Parameter

Period (ms)

VL6180x_RangeSetMaxConvergenceTime()

Total RANGE EXECUTION TIME

VL6180 数据表(PDF) 18 Page - STMicroelectronics

VL6180 数据表(HTML) 18 Page - STMicroelectronics

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

数据表下载