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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
unused signal header.
Table 2-8. Secondary UNI-3 Connector Description
Pin #
1
3
5
7
9
11
13
15
17
19
21
Motor DC Bus Voltage Sense
23
Motor Phase A Current Sense
25
Motor Phase C Current Sense
27
29
31
33
35
37
39
MOTOROLA
Freescale Semiconductor, Inc.
Signal
PWM_AT
PWM_AB
PWM_BT
PWM_BB
PWM_CT
PWM_CB
GND
NC
Analog GND
NC
NC
Motor Drive Brake Control
PFC PWM
PFC Zero Cross
Zero Cross B
Shield
Back-EMF Phase B Sense
Technical Summary
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Go to: www.freescale.com
Table 2-9
for the pin out of the
J31
Pin #
2
4
6
8
10
12
14
16
18
Analog GND
20
22
Motor DC Bus Current Sense
24
Motor Phase B Current Sense
26
Motor Drive Temperature Sense
28
30
Serial COM
32
PFC Inhibit
34
Zero Cross A
36
Zero Cross C
38
Back-EMF Phase A Sense
40
Back-EMF Phase C Sense
Secondary UNI-3 Interface
Table 2-8
for
Signal
Shield
Shield
Shield
Shield
Shield
GND
NC
NC
NC
Shield
2-13
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