Programmable Flag Push Buttons (Sw12-13); Rotary Encoder With Momentary Switch (Sw14); Sport0 Enbl Switch (Sw15) - Analog Devices ADSP-BF518F EZ-Board Manual

Push Button and Switch Settings
Programmable Flag Push Buttons (SW12–13)
Two momentary push buttons (
eral-purpose user input. The buttons connect to the
pins of the processor. The push buttons are active high and, when pressed,
send a high ( ) to the processor. The GPIO enable switch (
1
disconnects the push buttons from the corresponding push button signals.
Refer to "PB Enable Switch (SW2)" on page 2-9

Rotary Encoder with Momentary Switch (SW14)

The rotary encoder (
counter-clockwise for a down count. The encoder also features a
momentary switch, activated by pushing the switch towards the processor,
which resets the counter to zero. The rotary encoder is a two-bit quadra-
ture (gray code) encoder. Refer to the Rotary Counter section of the
ADSP-BF51x Blackfin Processor Hardware Reference for more information.
The rotary encoder is disconnected from the processor by setting
positions 1, 2, and 3 to
page 2-13 for more information.

SPORT0 ENBL Switch (SW15)

The enable switch (
SPORT0
cessor to the audio codec, SSM2603 (
to disconnect the TWI bus from the codec. When the
used on the expansion interface II, set
to all .
ON
2-12
and
SW12
) can be turned clockwise for an up count or
SW14
. See "Encoder Enable Switch (SW19)" on
OFF
) connects the
SW15
U1
SW15
ADSP-BF518F EZ-Board Evaluation System Manual
) are provided for gen-
SW13
and
PH0
for more information.
interface of the pro-
SPORT0
). positions 7 and 8 are used
SW15
SPORT0
all . By default,
OFF
GPIO
PH1
)
SW2
SW19
interface is
is set
SW15