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AS3517H-ECTP датащи(PDF) 48 Page - ams AG |
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AS3517H-ECTP датащи(HTML) 48 Page - ams AG |
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48 / 94 page ![]() AS3517 V17 Data Sheet, Confidential © 2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved. www.austriamicrosystems.com Start-up Sequence The AFE offers 25 different power-up sequences. The specific start-up sequence can be selected via VPRG1 and VPROG2 pin. Each pin detects 5 logical input states which shall come from an external resistor divider network. At first, LDO1 (AVDD) and LDO2 (DVDD) is powering up. This cannot be influenced with the selection of specific sequences below. LDO1 and LDO2 are necessary for the internal supply of the AFE. After power-up sequence selected by pin VPRG1, all voltage settings and power on/off conditions of the described regulators can be programmed via the serial interface. Table 36 Start-up Modes DCDC1 DCDC2 DCDC3 DCDC4 DCDC15 LDO3 LDO4 # VPRG2 VPRG1 CVDD1 CVDD2 CVDD3 VBUS VLED PVDD1 PVDD2 XRES/ PWGD 1 open open 1,2V 3rd 3,3V 2nd 3,3V 1st x x x x 4th 8th 2 open vdd 1,2V 3rd 2,5V 2nd 3,3V 1st x x x x 4th 8th 3 open 150k-vdd 1,2V 3rd 2,5V 2nd x x x 3,3V 1st x 4th 8th 4 open 150k-vss 1,2V 3rd 1,8V 2nd x x x 3,3V 1st x 4th 8th 5 open vss 1,2V 3rd x x x x 3,3V 1st 2,5V 2nd 4th 8th 6 150k-vdd open 1,5V 3rd 3,3V 2nd 3,3V 1st x x x x 4th 8th 7 150k-vdd vdd 1,5V 3rd 2,5V 2nd 3,3V 1st x x x x 4th 8th 8 150k-vdd 150k-vdd 1,5V 3nd 2,5V 2nd x x x 3,3V 1st x 4th 8th 9 150k-vdd 150k-vss 1,5V 3rd 1,8V 2nd x x x 3,3V 1st x 4th 8th 10 150k-vdd vss 1,5V 3rd x x x x 3,3V 1st 2,5V 2nd 4th 8th 11 vdd open 1,8V 3rd 3,3V 2nd 3,3V 1st x x x x 4th 8th 12 vdd vdd 1,8V 3rd 2,5V 2nd 3,3V 1st x x x x 4th 8th 13 vdd 150k-vdd 1,8V 3nd 2,5V 2nd x x x 3,3V 1st x 4th 8th 14 vdd 150k-vss 1,8V 3rd 1,8V 2nd x x x 3,3V 1st x 4th 8th 15 vdd vss 1,8V 3rd x x x x 3,3V 1st 2,5V 2nd 4th 8th 16 vss open 1,2V 1st 1,8V 2nd 3,3V 3rd 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 17 vss vdd 1,2V 1st 1,8V 2nd 3,0V 3rd 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 18 vss 150k-vdd 1,2V 1st 2,5V 2nd 3,3V 3rd 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 19 vss 150k-vss 1,8V 1st 2,5V 2nd 3,3V 3rd 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 20 vss vss 1,8V 1st 3,3 2nd 3,3V 3rd 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 21 150k-vss open 1,2V 3rd 1,8V 2nd 3,3V 1st 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 22 150k-vss vdd 1,2V 3rd 1,8V 2nd 3,0V 1st 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 23 150k-vss 150k-vdd 1,2V 3rd 2,5V 2nd 3,3V 1st 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 24 150k-vss 150k-vss 1,8V 3rd 2,5V 2nd 3,3V 1st 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th 25 150k-vss vss 1,8V 3rd 3,3 2nd 3,3V 1st 5,0V 5th 5mA 5th 3,0V 6th 3,0V 7th * 8th *… in Special Mode the XRES is going High 85us (min 60us) after PwrUp key is released x … means that this regulator is not started with the start-up sequencer but has to be turned on by the 2-wire serial interface when needed. Revision 1v3 47 - 93 |
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