DSP56F803EVM Freescale Semiconductor, DSP56F803EVM Datasheet - Page 32
![KIT EVALUATION FOR DSP56F803](/photos/39/39/393930/dsp56f803evmimg_sml.jpg)
DSP56F803EVM
Manufacturer Part Number
DSP56F803EVM
Description
KIT EVALUATION FOR DSP56F803
Manufacturer
Freescale Semiconductor
Datasheets
1.CWH-UTP-ONCE-HE.pdf
(2 pages)
2.DSP56F803EVM.pdf
(68 pages)
3.DSP56F803BU80E.pdf
(52 pages)
Specifications of DSP56F803EVM
Processor To Be Evaluated
56F803
Data Bus Width
16 bit
Interface Type
RS-232, JTAG
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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2-16
2.15 Back-EMF and Motor Phase Current Sensing
The UNI-3 connector supplies Back-EMF and Motor Phase Current signals from the three
phases of a motor attached to a motor drive unit. The Back-EMF signals on the UNI-3
connectors are derived from a resistor divider network contained in the motor drive unit.
These resistors divide down the attached motor’s Back-EMF voltages to a 0 to +3.3V
level. In certain instances, the Back-EMF signals can exceed this maximum range. The
Motor Phase Current signals are derived from current sense resistors. Both of these signal
groups are then routed to a group of header pins that allow the end user to select which
signal group the device’s A/D will monitor. Refer to
channel.
Figure 2-12. Primary Back-EMF or Motor Phase Current Sense Signals
PHASE_A_I_SENSE
BACK_EMF_A
DSP56F803EVM User Manual, Rev. 5
JG6
1
3
2
Figure 2-12
AN2
for the design of a single
Freescale Semiconductor
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