Design Consideration
MPC5604P Controller Board User’s Guide, Rev. 0
Freescale
21
Figure 5. MPC5604P Block Diagram
4.3
UNI3 Interfaces and External Fault Management
The motor power stages are controlled by microcontroller boards through two UNI3 and MC33937
connectors. The connector pin description was mentioned before in
Section 3, “Interface Description
.
Analog or digital signals from the power stage M1 can be processed by hardware to maintain fault
management. The MPC5604P has four fault inputs and switch off PWM output signals in module.
The FAULT0 signal can be set up as under- or over-voltage. Whether the output signals from Phase A or
DCBUS over-current comparator can be asserted to the input FAULT1, depends on jumper position J301.
The FAULT2 and FAULT3 inputs can be used as over-current signals from phase B and C. The phase OC
level is set up by trimmer R300, as given in
Figure 6
.