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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS3677 датащи(PDF) 34 Page - ams AG |
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AS3677 датащи(HTML) 34 Page - ams AG |
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34 / 68 page  www.austriamicrosystems.com/AS3677 1v3-1 33 - 67 AS3677 Datasheet - D e ta i l e d D e s c r i p t i o n Each of the available three channels (N=1 or 2) has six 8-bit registers: - groupN_y0: define current multiplier for values below groupN_X1 - groupN_y3: define current multiplier for high values (actual starting point defined by groupN_x1,groupN_k1 and groupN_x2,groupN_k2) - groupN_x1, groupN_k1: If ADC reading is > groupN_x1 then groupN_k1 divided by 32 defines the slope of the first ramp - groupN_x2, groupN_k2: If ADC reading is > groupN_x2 then groupN_k2 divided by 32 defines the slope of the second ramp Each current sources has a 2 bit register (currX_amb_group) to select None, Group1 or Group2 of ambient light sens- ing. The calculations are done every 1ms resulting in a flicker-free 1000Hz update rate of the current sources. Note: The ADC is switched off between conversion to save power. All groupN_k1 and groupN_k2 values are divided by 32 except group3_k1 (see page 39), which is divided by 1. This allows a step response to a small change in the input signal (e.g. for keyboard backlight). Table 44. ALS Parameters Symbol Parameter Condition Min Typ Max Unit IALSON ALS operating current averaged; excluding LDO supplying external sensor - see LDO on page 9 19 µA |
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