Analog Devices ADSP-BF526 EZ-Board Manual page 77

Table 2-11. GPIO Enable Switch (SW20)
SW20 Position From
(Default)
1 ( ) Push button 1
ON
(
SW19
2 ( ) Push button 2
ON
(
SW15
3 ( ) Power down push
OFF
button
(
SW16
4 ( ) Wake push but-
OFF
ton (
5 ( )
OFF OTP_FLAG_1P8V
(
U3
6 ( )
OFF USB_VRSEL
(
U23
The OTP memory writes require a precise 7V supply, which is turned on
by setting high the
the processor by setting positions 2 and 6 of
These settings connect the
pin of the precise 7V circuit
The
USB_VRSEL
interface when running in host mode. A connection to the
nal is set by the
Then the
PG13
trol the p-channel mosfet (
page 1-23 for more information.
ADSP-BF526 EZ-Board Evaluation System Manual
ADSP-BF526 EZ-Board Hardware Reference
To
Processor
) ( ,
U1 PG0
Processor
) ( ,
U1 PG13
Processor
( ,
U1 PG12
)
Processor
) ( ,
SW17 U1 PG15
Processor
) ( ,
U1 PG13
Processor
) ( ,
U1 PG13
OTP_FLAG_1P8V
flag pin of the processor to the shutdown
PG13
.
VR9
provides 5V to a device connected over the USB OTG
switch (positions 2 and 5
SW13
programmable flag pin of the processor can be used to con-
). Refer to
U23
Function
( )
ON PB1
) ( CTS
OFF UART1 U21
expansion interface II
( )
ON PB2
) (host connector
OFF
, OTG voltage select
SW20.8
interface II ,
P2.40 P4.40
( not driven by the power down push
OFF LED2
) button)
( drives
ON SW16 PG12
(connects the wake push button
ON
) )
PG15
( controls the OTP flag for OTP
ON PG13
) writes)
Requires
SW20.2 OFF
installed
( controls
ON PG13 USB_VRSEL PG13
) host power)
Requires
SW20.2 OFF
signal. The OTP flag is connected to
to
SW20 OFF
and position 6
OFF
"USB OTG Interface" on
, host connector ,
P9.12
, , )
P2.37 P4.37 J1.52
, OTP flag for writes
P9.8
, expansion
SW13.7
, )
J1.53
)
to
SW17
, , and
SW20.6 OFF JP16
for OTG
and
SW20.5 OFF
and position 5
ON
sig-
USB_VRSEL
).
ON
2-17
.