DRM33395 Datasheet, PDF (23/44 Pages) Motorola, Inc – ANALOG ICs 33395 EVALUATION MOTOR BOARD DESIGNER REFERENCE MANUALv

Freescale Semiconductor, Inc.
Pin Descriptions
Signal Descriptions
Table 3-1 Connector J1 Signal Descriptions (Sheet 3 of 3)
Pin
No.
Signal Name
Description
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.
33395 Evaluation Motor Board
DRM33395 Designer Reference Manual
MOTOROLA
Pin Descriptions
21
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