Secondary UNI-3 Interface
MOTOROLA
Technical Summary
2-13
2.12 Secondary UNI-3 Interface
A Secondary UNI-3 Motor Drive interface is available on the EVM board. Motor control
signals from a family of motor driver boards can be connected to the EVM board via the
Secondary UNI-3 connector/interface. The Secondary UNI-3 connector/interface contains
a majority of the signals needed to drive and control the motor drive boards. The unused
signals are connected to a header, J14. These signals are connected to differing groups of
the controller’s input and output ports: A/D, TIMER and PWM B. Refer to
the pin out of the Secondary UNI-3 connector and to
for the pin out of the
unused signal header.
Table 2-8. Secondary UNI-3 Connector Description
J31
Pin #
Signal
Pin #
Signal
1
PWM_AT
2
Shield
3
PWM_AB
4
Shield
5
PWM_BT
6
Shield
7
PWM_BB
8
Shield
9
PWM_CT
10
Shield
11
PWM_CB
12
GND
13
GND
14
NC
15
NC
16
NC
17
Analog GND
18
Analog GND
19
NC
20
NC
21
Motor DC Bus Voltage Sense
22
Motor DC Bus Current Sense
23
Motor Phase A Current Sense
24
Motor Phase B Current Sense
25
Motor Phase C Current Sense
26
Motor Drive Temperature Sense
27
NC
28
Shield
29
Motor Drive Brake Control
30
Serial COM
31
PFC PWM
32
PFC Inhibit
33
PFC Zero Cross
34
Zero Cross A
35
Zero Cross B
36
Zero Cross C
37
Shield
38
Back-EMF Phase A Sense
39
Back-EMF Phase B Sense
40
Back-EMF Phase C Sense
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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