Freescale Semiconductor 33395, Справочное руководство

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Pin Descriptions
Signal Descriptions
33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Pin Descriptions 21
31 PWM_ctrl
This is a gate drive digital signal that is used for power stage board control with use
of just one PWM input signal switching according to gate drive signals PWM_xx
32 — No connection
33 — No connection
34 Zero_cross_A
Zero_cross_A is a digital signal that is used for sensing phase A back-EMF zero
crossing events.
35 Zero_cross_B
Zero_cross_B is a digital signal that is used for sensing phase B back-EMF zero
crossing events.
36 Zero_cross_C
Zero_cross_C is a digital signal that is used for sensing phase C back-EMF zero
crossing events.
37 Shielding _A Pin 37 is connected to a shield wire in the ribbon cable and ground on the board.
38 BEMF_sense_A
BEMF_sense_A is an analog sense signal that measures phase A Back-EMF. It is
scaled at 0.206 volts per volt of dc bus voltage.
39 BEMF_sense_B
BEMF_sense_B is an analog sense signal that measures phase B Back-EMF. It is
scaled at 0.206 volts per volt of dc bus voltage.
40 BEMF_sense_C
BEMF_sense_A is an analog sense signal that measures phase C Back-EMF. It is
scaled at 0.206 volts per volt of dc bus voltage.
Table 3-1 Connector J1 Signal Descriptions (Sheet 3 of 3)
Pin
No.
Signal Name Description