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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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WM8948ECS/R Datenblatt(PDF) 65 Page - Wolfson Microelectronics plc |
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WM8948ECS/R Datenblatt(HTML) 65 Page - Wolfson Microelectronics plc |
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65 / 189 page  Production Data WM8948 w PD, May 2011, Rev 4.1 65 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 13 LDO_REF_SEL 0 LDO Voltage reference select 0 = VMID 1 = Bandgap 12 LDO_OPFLT 0 LDO Output float 0 = Disabled (Output discharged when disabled) 1 = Enabled (Output floats when disabled) 5 LDO_BIAS_SRC 0 LDO Bias Source select 0 = Master Bias 1 = Start-Up Bias 4:0 LDO_VSEL 00111 LDO Voltage select (Sets the LDO output as a ratio of the selected voltage reference. The voltage reference is set by LDO_REF_SEL.) 00111 = Vref x 1.97 (default) (See Table 38 for range) R54 (36h) Bandgap 15 BG_ENA 0 Bandgap Reference Control 0 = Disabled 1 = Enabled 4:0 BG_VSEL[4:0] 01010 Bandgap Voltage select (Sets the Bandgap voltage) 00000 = 1.200V … 26.7mV steps 01010 = 1.467V (default) … 01111 = 1.600V 10000 to 11111 = reserved (See Table 39 for values) Table 37 LDO Regulator Control LDO_VSEL [4:0] LDO OUTPUT LDO_VSEL [4:0] LDO OUTPUT 00h VRef x 1.42 10h VRef x 2.85 01h VRef x 1.50 11h VRef x 3.00 02h VRef x 1.58 12h VRef x 3.16 03h VRef x 1.66 13h VRef x 3.32 04h VRef x 1.74 14h VRef x 3.49 05h VRef x 1.82 15h VRef x 3.63 06h VRef x 1.90 16h VRef x 3.79 07h VRef x 1.97 17h VRef x 3.95 08h VRef x 2.06 18h VRef x 4.12 09h VRef x 2.13 19h VRef x 4.28 0Ah VRef x 2.21 1Ah VRef x 4.42 0Bh VRef x 2.29 1Bh VRef x 4.58 0Ch VRef x 2.37 1Ch VRef x 4.75 0Dh VRef x 2.45 1Dh VRef x 4.90 0Eh VRef x 2.53 1Eh VRef x 5.06 0Fh VRef x 2.69 1Fh VRef x 5.23 Note - VRef is the applicable voltage reference, selected by LDO_REF_SEL. Table 38 LDO Output Voltage Control |
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