2.2 Test Points
Several test points on the reference design monitor various signals, such as phase voltages and motor currents. These test points are marked in Figure 2-2 and summarized in Table 2-9.
| Test Point No. | Signal | Description |
|---|---|---|
| IA | IA | Phase A leg current feedback of inverter – internal amplifier (dsPIC33CDVC256MP506 Op Amp 2) output |
| IB | IB | Phase B leg current feedback of inverter – internal amplifier (dsPIC33CDVC256MP506 Op Amp 3) output |
| IBUS | IBUS |
Bus Current feedback of inverter – internal amplifier (dsPIC33CDVC256MP506 Op Amp 1) output |
| VA | VA | Phase A voltage feedback |
| VB | VB | Phase B voltage feedback |
| VC | VC | Phase C voltage feedback |
| VBUS | VBUS | DC Bus voltage feedback |
| VBOOT | VBOOT | VBOOT output of integrated MOSFET gate driver (U9B) – Bootstrap supply output (+12V) |
| TP12 | TP12 | Connected to microcontroller pin #10 (RB14/PWM1H) |
| TP13 | TP13 | Connected to microcontroller pin #53 (RB10/PWM3H) |
| TP14 | TP14 | Connected to microcontroller pin #54 (RB13) |
| TP17 | TP17 | Connected to General Purpose LED pin #29 (OSCO/CLKO/AN6/RP33/PMA1/PMALH/PSA1/RB1) |
| TP19 | TP19 | Connected to microcontroller pin #11(RB15/PWM1L) |
| TEMP | TEMP | Provision pin for external temperature sensor, connected to pin #24 (AN17/ANN1/IBIAS1/RP54/PMD12/PMA12/RC6) |
| AUX1 | AUX1 | Provision pin for user interface, connected to microcontroller pin #28 (OSCI/CLKI/AN5/RP32/PMD10/PMA10/RB0) |
| AUX2 | AUX2 | Provision pin for user interface, connected to microcontroller pin #36 (RP56/ASDA1/SCK2/RC8) |
| AUX3 | AUX3 | Provision pin for user interface, connected to microcontroller pin #37 (RP57/ASCL1/SDI2/RC9) |
| RSVD1 | RSVD1 | Provision pin for user interface, connected to microcontroller pin #39 (RP72/SDO2/PCI19/RD8) |
| RSVD2 | RSVD2 | Provision pin for user interface, connected to microcontroller pin #38 (RP73/PCI20/RD9) |