Secondary UNI-3 Interface
Technical Summary
2-15
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
all of the signals needed to drive and control the motor drive boards. These signals are
connected to various groups of the DSP’s input and output ports: A/D, TIMER and PWM
Port B. The header, JG10, is used to select between the Back-EMF and Motor Phase
Current signals. Refer to
for the pin out of the Secondary UNI-3 connector, J2.
37
Shield
38
Back-EMF Phase
A Sense
39
Back-EMF Phase
B Sense
40
Back-EMF Phase
C Sense
Table 2-7. Secondary UNI-3 Connector Description
J2
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
Table 2-6. Primary UNI-3 Connector Description (Continued)
J1
Pin #
Signal
Pin #
Signal
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