Push Button and Switch Settings
2-12
ADSP-BF518F EZ-Board Evaluation System Manual
UART Setup Switch (SW10)
The UART setup switch (
SW10
) configures the
UART0
signals from the
GPIO pins of the processor. Position 4 is used to place the
UART0
port of
the processor in a loopback condition. The jumper connects the
UART0_TX
line of the processor to the
UART0_RX
signal of the processor. This is
required when a POST program is run to test the serial port interface. By
default,
SW10
is
ON
,
OFF
,
ON
,
OFF
.
Reset Push Button (SW11)
The reset push button (
SW11
) resets the following ICs.
• Processor (
U12
), parallel flash (
U5
), and Ethernet IC (
U4
)
The reset push button does not reset the following ICs.
• SDRAM (
U14
), eMMC (
U16
)
• Audio codec (
U1
),
UART0
(
U21
), schmitt trigger hex inverter (
U6
)
• Digipot (
U7
), power (
VR1—5
)
The reset push button does not reset the standalone debug agent once the
debug agent is connected to a personal computer (PC). After communica-
tion between the debug agent and PC is initialized, pushing a reset button
does not reset the USB chip on the debug agent. The only way to reset the
USB chip on the debug agent is to power down the EZ-Board.
Programmable Flag Push Buttons (SW12–13)
Two momentary push buttons (
SW12
and
SW13
) are provided for gen-
eral-purpose user input. The buttons connect to the
PH0
and
PH1
GPIO
pins of the processor. The push buttons are active high and, when pressed,
