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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8352 데이터시트(PDF) 129 Page - Wolfson Microelectronics plc |
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WM8352 데이터시트(HTML) 129 Page - Wolfson Microelectronics plc |
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129 / 336 page  Production Data WM8352 w PD, February 2011, Rev 4.4 129 The default output voltage for DC-DC Converters 1, 3, 4 and 6 is set by writing to the DCn_VSEL register bits. The ‘image’ voltage settings DCn_VIMG are alternate values that may be invoked when the HIBERNATE software or hardware control is asserted as described above. The DC-DC Converters 1, 3, 4 and 6 are dynamically programmable - the output voltage may be adjusted in software at any time. These Converters are buck (step-down) converters; their output voltage can therefore be lower than the input voltage, but cannot be higher. ADDRESS BIT LABEL DEFAULT DESCRIPTION R180 (B4h) for DC-DC1 R186 (BAh) for DC-DC3 R189 (BDh) for DC-DC4 R195 (C3h) for DC-DC6 6:0 DCn_VSEL [6:0] Dependant on CONFIG settings DC-DCn Converter output voltage settings in 25mV steps. Maximum output = 3.4V. 110 0110 = 3.4V 110 0010 = 3.3V 101 0110 = 3.0V 100 1110 = 2.8V …… 010 0110 = 1.8V 000 1110 = 1.2V 000 0110 = 1.0V 000 0000 = 0.85V R182 (B6h) for DC-DC1 R188 (BCh) for DC-DC3 R191 (BFh) for DC-DC4 R197 (C5h) for DC-DC6 6:0 DCn_VIMG [6:0] 000 0110 DC-DCn Converter output image voltage settings in 25mv steps. Maximum output = 3.4V. 110 0110 = 3.4V 110 0010 = 3.3V 101 0110 = 3.0V 100 1110 = 2.8V …… 010 0110 = 1.8V 000 1110 = 1.2V 000 0110 = 1.0V 000 0000 = 0.85V Note: n is either 1, 3, 4 or 6 and identifies the individual DC-DC converter Table 74 Output Voltage Control for DC-DC Converters 1, 3, 4 and 6 When the DC-DC Converters 1, 3, 4 and 6 are disabled, the output can be set to float or else the outputs can be actively discharged through internal resistors. This feature is controlled using the register bits described in Table 75. ADDRESS BIT LABEL DEFAULT DESCRIPTION R180 (B4h) for DC-DC1 R186 (BAh) for DC-DC3 R189 (BDh) for DC-DC4 R195 (C3h) for DC-DC6 10 DCn_OPFLT 0 Enable discharge of DC-DCn outputs when DC-DCn is disabled 0 = Enabled - Output to be discharged 1 = Disabled - Output is left floating Note: n is either 1, 3, 4 or 6 and identifies the individual DC-DC converter Table 75 Output Float Control for DC-DC Converters 1, 3, 4 and 6 |
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