wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 183
wm8351
Manufacturer Part Number
wm8351
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8351.pdf
(328 pages)
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Table 123 List of GPIO Alternate Functions
POR_B
PWR_ON
/RST
RTC
SDOUT
/VCC_FAULT
VRTC
32kHz
FUNCTION NAME
ALTERNATE
Output
Output
Output
Output
Output
Output
Output
Output
OUTPUT
INPUT /
Output which toggles low to high during power-on reset
Output used to indicate that device is powered on (eg. to
enable external DC-DC converters). This output is disabled
in the OFF state.
Output used to indicate system resets. Signal goes low
during reset, same as the /RST pin. The pulse duration is
programmable. See Section 14.
Real Time Clock output - frequency is controlled by
RTC_DSW[3:0]. See Section 22.
4-wire Control Interface data output pin (SDOUT). Note
that this function is selected automatically on GPIO6 when
4-wire mode is selected, ie. regardless of the GP6_FN
control field. See Section 11.
Indicates a fault condition on selectable DC Converters,
LDO Regulators and the Limit Switch. The mask bits in
Register 215 determine which supplies contribute to this
status flag. See Section 14.6.5, Section 14.7.3 and
Section 15.2.3.
Output from on-chip backup power source voltage
regulator VRTC.
32kHz clock output from the Real Time Clock oscillator.
DESCRIPTION
PD, June 2009, Rev 4.1
WM8351
183
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