Power:
3.3v supply pins are provided on either side of the module. These pins are all internally connected inside of the SiP and are provided for convenience so that Ginseng can be powered from either the left or right sides to make routing a PCB convenient for various applications. It is generally recommended to power the 3.3V bus from only one side of the SiP. The pins on the other side should be shunted to ground through a 0.1uF and 1uF set of capacitors.
3.3v supply pins are provided on either side of the module. These pins are all internally connected inside of the SiP and are provided for convenience so that Ginseng can be powered from either the left or right sides to make routing a PCB convenient for various applications. It is generally recommended to power the 3.3V bus from only one side of the SiP. The pins on the other side should be shunted to ground through a 0.1uF and 1uF set of capacitors.
XPD:
The XPD port is a SPI bus used for loading module firmware during development
and mass production and also for debugging. One of the following two styles of
XPD port connectors should be included on all motherboard designs that use
Ginseng to ensure that loading code and debugging can be done easily. The XPD
port interfaces to the XPD module which provides an interface to a host
computer via RS-232 or USB. The XPD port operates from the VCC bus. To ensure
proper functionality of the XPD interface, be sure to minimize the amount of
capacitance on the XPD lines. Note: the XPD_RESET / EXT_RST pin is tolerant up
to 1.8V MAX -- if control of the Reset pin is desired, a series diode must be
used to guarantee the input voltage does not exceed the 1.8V max.
Digital
IO:
Ginseng has general purpose digital IO (“GPIO”) pins available for use by the
application firmware. GPIO pins use the same logic voltage as the 3.3V pin and
have the following software configurable features: IO direction, drive strength
(for output only), Schmitt Trigger (for input only), pull up (input only), pull
down (input only), slew rate (output only). Ginseng is also capable of
active-high and active-low configuration of LEDs.
Circuit diagram [Click on the schematics to magnify]
Subwoofer
Level control:
Use
this control to balance the subwoofer’s volume with that of the soundbar. Turn the
knob clockwise to increase the subwoofer’s volume; turn it counterclockwise to
decrease the subwoofer’s volume. Crossover
control: This knob adjusts the subwoofer’s cutoff between 40Hz and 200Hz.The
higher you set the Cutoff control, the higher in frequency the subwoofer will
operate and the more its bass will “overlap” that of the soundbar. This
adjustment helps achieve a smooth transition of bass frequencies between the
subwoofer and the soundbar for a variety of different rooms and subwoofer locations.
See Subwoofer Crossover control, on page 8, for more information. Phase switch: This switch determines whether
the subwoofer driver’s piston-like action moves in and out in phase with the
speakers in the soundbar. If the subwoofer were to play out of phase with the
soundbar speakers, some of the sound waves produced by the subwoofer or soundbar
could be canceled, reducing bass performance and sonic impact. This phenomenon
depends in part on the relative placement of the speakers in the room. See Subwoofer
Phase switch, on page 8, for more information.
