Motor Protection Logic; Pwm Group A Interface And Leds - Motorola Digital DNA DSP56F807 Hardware User Manual

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
J10 and J11 respectively, and are available for use by the end user.
DSP56F807
PWMA0
PWMA1
PWMA2
PWMA3
PWMA4
PWMA5
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-compatible +3.3V DC fault signal is generated.
Figure 2-11. PWM Group A and B signals are routed out to headers,
LED
BUFFER
Technical Summary
Motor Protection Logic
+3.3V
LED4
YELLOW LED
PHASE A TOP
LED5
GREEN LED
PHASE A BOTTOM
LED6
YELLOW LED
PHASE B TOP
LED7
GREEN LED
PHASE B BOTTOM
LED8
YELLOW LED
PHASE C TOP
LED9
GREEN LED
PHASE C BOTTOM
UNI-3
PWMA0
PWMA1
PWMA2
PWMA3
PWMA4
PWMA5
2-19