Freescale Semiconductor 33395, Справочное руководство

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Pin Descriptions
Signal Descriptions
33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Pin Descriptions 19
3.3 Signal Descriptions
Pin descriptions are identified in this subsection.
3.3.1 Power Connectors J3 and JP4
Two connectors, labeled J3 and JP4, are provided for the 12-volt power
supply. They are located on the bottom left-hand corner of the board.
Connector J3 is a 2.5-mm power jack for plug-in type 12-volt power
supply connections. Connector JP4 has screw terminal inputs l
(plus) and – (minus), for accepting wire inputs. Power is supplied to one
or the other, but not both. The power supply required parameters
depend on the motor type used. The default output current limit of the
board is 10 amps.
3.3.2 40-Pin Ribbon Connector J1
Signal inputs are grouped together on 40-pin ribbon cable connector J1,
located on the right side of the board. Pin assignments are shown in
Figure 3-1 . Pin descriptions are listed in Table 3-1 .
Table 3-1 Connector J1 Signal Descriptions (Sheet 1 of 3)
Pin
No.
Signal Name Description
1 PWM_AT
PWM_AT is the gate drive signal for the top half-bridge of phase A. A logic high at
input connector J1 turns on the phase A top switch.
2 Shielding_D Pin 2 is connected to a shield wire in the ribbon cable and ground on the board.
3 PWM_AB
PWM_AB is the gate drive signal for the bottom half-bridge of phase A. A logic high
at input connector J1 turns on the phase A bottom switch.
4 Shielding_D Pin 4 is connected to a shield wire in the ribbon cable and ground on the board.
5 PWM_BT
PWM_BT is the gate drive signal for the top half-bridge of phase B. A logic high at
input connector J1 turns on the phase B top switch.
6 Shielding_D Pin 6 is connected to a shield wire in the ribbon cable and ground on the board.
7 PWM_BB
PWM_BB is the gate drive signal for the bottom half-bridge of phase B. A logic high
at input connector J1 turns on the phase B bottom switch.
8 Shielding_D Pin 8 is connected to a shield wire in the ribbon cable and ground on the board.