Voltage Reference Selection Jumpers (Jp3, Jp4); Pwm Trip Jumper (Jp5) - Analog Devices ADSP-21992 EZ-KIT LITE System Manual

Jumper Settings
If is in the 2-3 position, the power-on reset (POR) of the
JP2
ADSP-21992 is directly connected to the reset pin of the ADSP-21992.
The 1-2 position (default) is the recommended configuration when using
the VisualDSP++ development tools.

Voltage Reference Selection Jumpers (JP3, JP4)

The configuration of two jumpers (
selection of the ADSP-21992 DSP's internal voltage reference or the
external voltage reference provided on the ADSP-21992 EZ-KIT Lite
board. The appropriate settings for the jumpers to select internal or exter-
nal voltage reference operation are:
• Internal reference:
• External reference:
Refer to "Reference Voltage Generation" on page 3-6
age voltage operation.

PWM Trip Jumper (JP5)

Connecting jumper
ADSP-21992 to +3.3V via a 4.7 Kohm resistor and enables the
puts. In this case, the
external circuitry via the
jumper in the 1-2 position connects the
JP5
ADSP-21992 to
third alternative is to leave
the ADSP-21992 is connected to the
can be defined by external circuitry.
3-14
in position 1-2, and
P3
in position 2-3, and
P3
in the 2-3 position ties the
JP5
pin of the ADSP-21992 can be defined by
PWMTRIP
connector (
PWM
, thereby permanently disabling the
GND
unconnected. Again, in this case, the pin of
JP5
ADSP-21992 EZ-KIT Lite Evaluation System Manual
and ) is required to control the
JP3 JP4
JP4
JP4
PWMTRIP
). Alternatively, connecting
P10
pin of the
PWMTRIP
connector (
PWM P10
is open
is closed
for details on volt-
pin of the
out-
PWM
outputs. A
PWM
) so that its value