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AS3676 Datasheet(PDF) 37 Page - ams AG |
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AS3676 Datasheet(HTML) 37 Page - ams AG |
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37 / 92 page  www.austriamicrosystems.com/AS3676 1v1-4 36 - 91 AS3676 Datasheet - D e ta i l e d D e s c r i p t i o n 8.4.6 LED Pattern Generator The LED pattern generator is capable of producing a pattern with 32 bits length and 1 second duration (31.25ms for each bit). The pattern itself can be started every second, every 2 nd, 3rd up to 7th second4. With this pattern all current sinks can be controlled. The pattern itself switches the configured current sources between 0 and their programmed current. If everything else is switched off, the current consumption in this mode is IACTIVE. (excluding current through switched on current source) and the charge pump, if required. The charge pump can be automatically switched on/off depending on the pattern (set register cp_auto_on on page 20=1) to reduce the overall current consumption. LED pattern start/stop depends on writing the pattern registers in correct order - it is recommended to use austriami- crosystems Android driver to ensure this. Table 47. Curr41 current Register Addr: 13h Curr41 current This register controls the curr41 current sink current. Bit Bit Name Default Access Description 7:0 curr41_current 0R/W Defines current into Current sink CURR41 00h 0 mA 01h 0.15 mA .... .... FFh 38.25 mA Table 48. Curr42 current Register Addr: 14h Curr42 current This register controls the curr42 current sink current. Bit Bit Name Default Access Description 7:0 curr42_current 0R/W Defines current into Current sink CURR42 00h 0 mA 01h 0.15 mA .... .... FFh 38.25 mA Table 49. Curr43 current Register Addr: 15h Curr43 current This register controls the curr43 current sink current. Bit Bit Name Default Access Description 7:0 curr43_current 0R/W Defines current into Current sink CURR43 00h 0 mA 01h 0.15 mA .... .... FFh 38.25 mA 4. All times can be extended by a factor of 8 by setting pattern_slow=1 (this result in a delay of up to 56s) |
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