Uart Interface - Analog Devices ADSP-BF526 EZ-Board Manual

UART Interface

device mode, the USB 5V FET switch (
mode, the ADSP-BF526 EZ-Board can supply 5V to a device, if desired.

A 5V, 500 mA current can be supplied only when the EZ-Board is
powered from the 5V wall source.
The 5V supplied to an external USB device is controlled by the
pin of the processor.
through switch
USB_VRSEL
Devices ADM869L p-channel FET, which has an active low
default,
USB_VRSEL
connects the 5V wall supply to
a device, set
SW20
push button 2. Note that signal
not use the push button when controlling the
By default,
SW20
and shut off the p-channel FET (
Enable Switch (SW20)" on page 2-16.
The USB OTG interface has a mini-AB connector (
into is shipped with the EZ-Board.
P8
Use the example programs in the EZ-Board installation directory to learn
about the ADSP-BF526 processor's device and host modes. For more
information about the USB interface, refer to the ADSP-BF52x Blackfin
Processor Hardware Reference.
UART Interface
The ADSP-BF526 processor has two built-in universal asynchronous
receiver transmitters (UARTs).
other peripherals on the EZ-Board.
has full RS-232 functionality via the Analog Devices 3.3V
UART1
ADM1385 line driver and receiver (
1-24
must be connected on the board to signal
PG13
. The
SW20
is held high or a logic '
VBUS
positions 2 and 5
HOSTADDR
positions 2, 5, and 6 are
U23
UART0—1
ADSP-BF526 EZ-Board Evaluation System Manual
) is turned
U23
signal controls an Analog
USB_VRSEL
' via a pull-up resistor and dis-
1
. To set host mode and provide 5V to
and position 6
OFF
is shared with push button 2; do
USB_VRSEL
, , and
ON OFF
). For more information, see "GPIO
P8
share the processor pins with
). The ADSP-BF526 processor is
U21
. When in host
OFF
flag
PG13
pin. By
ON
. This disables
ON
signal.
(respectively)
OFF
); a cable that plugs