Analog Devices ADSP-21992 EZ-KIT LITE, Системное руководство, Страница: 59 / 87

ADSP-21992 EZ-KIT Lite Evaluation System Manual 3-15
EZ-KIT Lite Hardware Reference
PWM Switched Reluctance Mode Jumper (JP6)
Connecting
JP36
in the 2-3 position ties the
PWMSR
pin of the
ADSP-21992 to +3.3V and disables the
PWM
switched reluctance mode.
Alternatively, connecting
JP6
in the 1-2 position ties the
PWMSR
pin of the
ADSP-21992 to
GND
and enables
PWM
switched reluctance mode.
PWM Polarity Jumper (JP7)
Connecting
JP7
in the 2-3 position ties the
PWMPOL
pin of the
ADSP-21992 to +3.3V and enables active
HI PWM
outputs. Alternatively,
connecting
JP7
in the 1-2 position creates active
LO PWM
outputs from the
ADSP-21992. The appropriate setting for this jumper is determined by
the exact nature of the gate drive circuit of the target system. A third alter-
native is to leave
JP5
unconnected. In this case, its state can be determined
by external hardware.
AUXPWM Trip Jumper (JP8)
Connecting jumper
JP8
in the 2-3 position ties the
AUXTRIP
pin of the
ADSP-21992 to
VDD
and enables
AUXPWM
outputs. In this case, the
AUXTRIP
pin of the ADSP-21992 can be defined by external circuitry, via the
PWM
connector (
P10
). Alternatively, connecting jumper
JP8
in the 1-2 position
connects the
AUXTRIP
pin of the ADSP-21992 to
GND
, thereby permanently
disabling
AUXPWM
outputs. A third alternative is to leave
JP8
unconnected.
Again, in this case, the
AUXTRIP
pin of the ADSP-21992 is connected to
the
PWM
connector (
P10
) so that its value can be defined by external
circuitry.