ADEV-BF52xC_HUM_V1.1.docx
11
2
General Description
The ADEV-BF52xC has been designed as evaluation and development platform for both,
A
udio
C
ore
M
odules
ACM-
BF52xC
or
S
peech
P
rocessing
M
odules e.g.
SPM-B1xx
. For more information about the modules refer the
Hardware User Manuals on our website.
2.1
Functional Description
2.1.1
Powering
The Step-Down DC-DC converter allows powering the development board via the DC-power plug, by connecting an
external power source between 4.5V and 17V.
Alternatively the board can be powered via either the USB-B or the mini USB-B connector. If so, the DC-DC converter
is not used.
To choose the correct powering configuration, the right jumper-setting is needed (see Table 2-3).
2.1.2
USB Device
The ADSP-BF52xC has an integrated USBOTG controller. The USB-D+ and USB-D- Lines can be routed directly to a
USB connector. The USB-ID Pin is used to indicate whether the SPM/ACM-BF52x is a USB-Device or a USB-Host. The
VUSB pin is used to indicate, if a USB bus power is applied.
The USB data lines and the VBUS are protected against ESD complying with IEC61000-4-2 level 4 standard:
•
15kV air discharge
•
8kV contact discharge
The ADEV-BF52xC uses only a mini USB-B connector and does not support USBOTG (host-mode).
2.1.3
Analog Interface
All analog I/Os are connected to 35mm stereo audio jacks. The stereo line-out is routed to the black jack, the stereo
headphone, the stereo line-in and the microphone lines are available on the standard-colored jacks.
Interface
Jack color
Function
Line In
Blue
Stereo audio input
Line Out
Black
Stereo audio output
Mic In
Red
Microphone input with phantom-power for electrets-microphones
HP out
Green
Stereo audio output capable for headphones
Table 2-1: Analog interface description
If no external microphone is plugged in to the red jack, the on-board microphone is active. To calibrate the gain
there is a small trimmer potentiometer which allows adjusting the built-in preamp.
