Freescale Semiconductor MPC5604P, Руководство пользователя, Страница: 11 / 43

Interface Description
MPC5604P Controller Board User’s Guide, Rev. 0
Freescale 11
3.3 MC33937A Interface J302
When using a Freescale 3-phase power stages, the electrical inverter switches are controlled by the
MC33937A pre-driver. The device behavior is configured by this interface, see
Table 4 .
3.4 Resolver Connector J207
The controller board is able to calculate motor rotor position from resolver or SIN/COS sensor. They are
connected to the board through connectors J207,
Table 5 shows pin description.
36 ZCC G[2] or A[2] Phase C Back-EMF
zero crossing
Digital input
38 Back-EMF_A B[9] Phase A Back-EMF
voltage sensing
Analog input
39 Back-EMF_B B[10] Phase B Back-EMF
voltage sensing
Analog input
40 Back-EMF_C B[11] Phase C Back-EMF
voltage sensing
Analog input
Table 4. Motor 1 - MC33937A Signal Description
Interface Pin Signal Name MCU Signal Description Direction
1 NC — Not connected. —
2 NC — Not connected. —
3 33937_EN G[0] Motor 1 device-enable
output. Digital output
4 33937_OC C[8] Over-current input. Digital input
5 33937_/RST C[10] Reset output. Active in
low. Digital output
6 33937_INT C[9] Interrupt pin. Digital input
7 33937_SOUT DSPI3_SIN Input data from
MC33937 SPI port.
Tri-state until CS
becomes low. Digital input
8 33937_SCK DSPI3_SCK Clock for SPI port.
Output. Digital output
9 33937_CS DSPI3_/CS0 Chip-select 0 output. It
frames SPI command
and enables SPI port. Digital output
10 33937_SIN DSPI3_SOUT Output data for
MC33937 SPI port.
Clocked on the falling
edge of SCLK, MSB
first. Digital output
Table 3. Motor 1 - UNI-3 Signal Description
Interface Pin Signal Name MCU Signal Description Direction