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WM8351 датащи(PDF) 116 Page - Wolfson Microelectronics plc |
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WM8351 датащи(HTML) 116 Page - Wolfson Microelectronics plc |
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116 / 330 page ![]() WM8351 Production Data w PD, April 2012, Rev 4.5 116 14.5 CUSTOM MODES The WM8351 provides three custom start-up modes. These are selected by setting the CONF1 and CONF0 pins = 01, 10 or 11. The custom mode start-up sequences define the following parameters: Polarity of the ON pin (Active low or high) Configuration of the USB power source Configuration of the Watchdog timer mode Configuration of the Control Interface mode Configuration of the 32kHz oscillator (enabled or disabled) Configuration of the real-time-clock (enabled or disabled) Configuration of LDO1 Selection of crystal oscillator detect mode (see Section 14.3.6) Configuration of the voltage settings and start-up timeslots for DC-DC and LDO supplies Configuration of GPIO pins In Development Mode, the RECONFIG_AT_ON register bit (see Section 14.4.2) may be used to control the device configuration behaviour. In Custom Modes 01, 10 or 11, the default setting (RECONFIG_AT_ON = 1) must always be used. Setting this bit to 0 may result in erroneous behaviour and deviation from the custom configuration settings. The custom modes do not allow configuring the WM8351 in the OFF state. As a result, evaluation and debugging in custom modes is limited. |
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