Freescale Semiconductor 56F8300 Series, Руководство пользователя

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56F8357EVM User Manual, Rev. 1
2-20 Freescale Semiconductor
Preliminary
2.12 Motor Control PWM Signals and LEDs
The 56F8357 has two independent groups of dedicated PWM units. Each unit contains six PWM,
three Phase Current sense inputs and four Fault input lines. PWM group A’s PWM lines are
connected to a set of six PWM LEDs via inverting buffers. The buffers are used to isolate and
drive the Processor’s PWM group A’s outputs to the PWM LEDs. The PWM LEDs indicate the
status of PWM group A signals; refer to
Figure 2-10 . PWM Group A and B signals are routed
out to headers, J7 and J8 respectively, and to the peripheral daughter card connector for easy use
by the end user.
Figure 2-10. PWM Group A Interface and LEDs
LED
+3.3V
LED9
56F8357
LED10
LED11
LED12
LED7
LED8
PWMA0
PWMA1
PWMA2
PWMA3
PWMA5
Buffer
PWMA0
Yellow LED
PWMA1
PWMA2
PWMA3
PWMA4
PWMA5
Green LED
Yellow LED
Green LED
Yellow LED
Green LED
Phase A Top
Phase A Bottom
Phase B Top
Phase B Bottom
Phase C Top
Phase C Bottom
PWMA4