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WM8321 датащи(PDF) 192 Page - Wolfson Microelectronics plc |
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WM8321 датащи(HTML) 192 Page - Wolfson Microelectronics plc |
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192 / 253 page ![]() WM8321 Production Data w PD, February 2012, Rev 4.0 192 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO 68h to 7Fh = 1.8V Note - Maximum output voltage selection in 4MHz switching mode is 48h (1.4V). Register 405Ah DC1 DVS Control REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R16475 (405Bh) DC2 Control 1 15:14 DC2_RATE [1:0] 10 DC-DC2 Voltage Ramp rate 00 = 1 step every 32us 01 = 1 step every 16us 10 = 1 step every 8us 11 = Immediate voltage change 12 DC2_PHASE 1 DC-DC2 Clock Phase Control 0 = Normal 1 = Inverted 9:8 DC2_FREQ [1:0] 00 DC-DC2 Switching Frequency 00 = Reserved 01 = 2.0MHz (2.2uH output inductor) 10 = 4.0MHz (1uH output inductor) 11 = 4.0MHz (0.5uH output inductor) This field can only be written to by loading configuration settings from OTP/ICE. In all other cases, this field is Read Only. 7 DC2_FLT 0 DC-DC2 Output float 0 = DC-DC2 output discharged when disabled 1 = DC-DC2 output floating when disabled 5:4 DC2_SOFT_ST ART [1:0] 00 DC-DC2 Soft-Start Control (Duration in each of the 8 startup current limiting steps.) 00 = 32us steps 01 = 64us steps 10 = 128us steps 11 = 256us steps 1:0 DC2_CAP [1:0] 00 DC-DC2 Output Capacitor 00 = 4.7uF to 20uF 01 = Reserved 10 = 22uF to 47uF 11 = Reserved This field can only be written to by loading configuration settings from OTP/ICE. In all other cases, this field is Read Only. Register 405Bh DC2 Control 1 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R16476 (405Ch) DC2 Control 2 15:14 DC2_ERR_AC T [1:0] 00 DC-DC2 Error Action (Undervoltage) 00 = Ignore 01 = Shut down converter 10 = Shut down system (Device Reset) 11 = Reserved Note that an Interrupt is always raised. |
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