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WM8321 数据表(PDF) 70 Page - Wolfson Microelectronics plc |
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WM8321 数据表(HTML) 70 Page - Wolfson Microelectronics plc |
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70 / 253 page  WM8321 Production Data w PD, February 2012, Rev 4.0 70 ADDRESS BIT LABEL DEFAULT DESCRIPTION R16470 (4056h) DC1 Control 1 15:14 DC1_RATE [1:0] 10 DC-DC1 Voltage Ramp rate 00 = 1 step every 32us 01 = 1 step every 16us 10 = 1 step every 8us 11 = Immediate voltage change 12 DC1_PHASE 0 DC-DC1 Clock Phase Control 0 = Normal 1 = Inverted 9:8 DC1_FREQ [1:0] 00 DC-DC1 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 DC1_FLT 0 DC-DC1 Output float 0 = DC-DC1 output discharged when disabled 1 = DC-DC1 output floating when disabled 5:4 DC1_SOFT_ START [1:0] 00 DC-DC1 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 DC1_CAP [1:0] 00 DC-DC1 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. R16471 (4057h) DC1 Control 2 15:14 DC1_ERR_A CT [1:0] 00 DC-DC1 Error Action (Undervoltage) 00 = Ignore 01 = Shut down converter 10 = Shut down system (Device Reset) 11 = Reserved Note that an Interrupt is always raised. 12:11 DC1_HWC_ SRC [1:0] 00 DC-DC1 Hardware Control Source 00 = Disabled 01 = Hardware Control 1 10 = Hardware Control 2 11 = Hardware Control 1 or 2 10 DC1_HWC_ VSEL 0 DC-DC1 Hardware Control Voltage select 0 = Set by DC1_ON_VSEL 1 = Set by DC1_SLP_VSEL |
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