Motor Protection Logic
Technical Summary
2-19
group A’s outputs to the PWM LEDs. The secondary PWM signals are routed to the
Secondary UNI-3 connector. The PWM LEDs indicate the status of PWM group A
signals, as shown in
. PWM Group A and B signals are routed out to headers,
J10 and J11 respectively, and are available for use by the end user.
Figure 2-11. PWM Group A Interface and LEDs
2.16 Motor Protection Logic
The DSP56F807EVM contains two UNI-3 connectors that interface with various motor
drive boards, Primary UNI-3 and Secondary UNI-3. The DSP can sense error conditions
generated by the motor power stage boards via signals on the UNI-3 connector. The motor
driver board’s Motor Supply DC Bus Voltage, Current and Motor Phase Currents are
sensed on the power stage board. The conditioned signals are transferred to the DSP board
via the UNI-3 connector. These analog input signals are compared to a limit set by
trimpots. If the input analog signals are greater than the limit set by the trimpot, a DSP
digital voltage-comp3.3V DC fault signal is generated.
DSP56F807
LED
BUFFER
UNI-3
PWMA0
PWMA1
PWMA2
PWMA3
PWMA4
PWMA5
PWMA0
PWMA1
PWMA2
PWMA3
PWMA4
PWMA5
YELLOW LED
GREEN LED
GREEN LED
GREEN LED
YELLOW LED
YELLOW LED
+3.3V
PHASE A TOP
PHASE A BOTTOM
PHASE B TOP
PHASE B BOTTOM
PHASE C TOP
PHASE C BOTTOM
LED4
LED5
LED6
LED7
LED8
LED9
Summary of Contents for Digital DNA DSP56F807
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