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Table 2-6. Primary UNI-3 Connector Description (Continued)
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
Table 2-7. Secondary UNI-3 Connector Description
Pin #
Signal
37
Shield
39
Back-EMF Phase
B Sense
Table 2-7
for the pin out of the Secondary UNI-3 connector, J2.
Pin #
Signal
1
PWM_AT
3
PWM_AB
5
PWM_BT
7
PWM_BB
9
PWM_CT
11
PWM_CB
13
GND
15
NC
17
Analog GND
19
NC
21
Motor DC Bus
Voltage Sense
23
Motor Phase A
Current Sense
Technical Summary
J1
Pin #
Signal
38
Back-EMF Phase
A Sense
40
Back-EMF Phase
C Sense
J2
Pin #
Signal
2
Shield
4
Shield
6
Shield
8
Shield
10
Shield
12
GND
14
NC
16
NC
18
Analog GND
20
NC
22
Motor DC Bus
Current Sense
24
Motor Phase B
Current Sense
Secondary UNI-3 Interface
2-15
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