WM8351 datasheet(116/330 Pages) WOLFSON

tên linh kiện	WM8351

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WM8351

Production Data

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.

WM8351 bảng dữ liệu(PDF) 116 Page - Wolfson Microelectronics plc