UM-YROTATE-IT-RX62T datasheet(11/54 Pages) RENESAS

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RX62T

YROTATE-IT-RX62T Motor Control Kit

UM-YROTATE-IT-RX62T Rev.1.00

Page 11 of 51

Jan 15, 2014

The interface between the board and an external power stage is organized as follows:

a) A 16 pins connector (J11) is used for the PWM drive signals; the signals are directly connected to the

microcontroller output pins, and there is no pull-up or pull-down resistor connected, so the polarization has

to be done in the power stage (note that in case of alarm, the microcontroller output pins can be placed in

high impedance state, so the external polarization is necessary); these output commands are logic level

signals, with limited current output capability, so an external driver is probably required. A further line is

connected to the microcontroller: it is the external alarm signal, connected to the POE input pin; this pin is

not polarized, so if the POE is enabled and the input is left unconnected, undesired alarms can occur. All the

free pins of the connector are connected to the board ground to minimize the cross talking of the lines if a

flat cable is used.

b) A 26 pins connector (J13) is used to collect some signals from the power stage, in particular the current

readings and the DC link voltage reading; those signals are clamped and weakly filtered, then directly

connected to the A/D converter input pins of the microcontroller, so the external power stage has to take

care of the gain and the offset of these signals. An input is dedicated also to a thermal sensor, and a pull-up

resistor is present. Three further signals are managed: they are the commutation signals from the output

phases, useful if the hardware compensation of dead-times facility of the MTU is used; those signals are

CONN. J13

AN102 (UP85) U PHASE CURRENT SIGNAL

100R

+5V

15K

+5V

100R

+5V

100R

+5V

15K

+5V

15K

+5V

100R

+5V

10K

+5V

AN101 (UP86) V PHASE CURRENT SIGNAL

AN103 (UP84) VBUS VOLTAGE SIGNAL

MTIC5U (UP96) U PHASE COMM. SIGNAL

MTIC5V (UP97) V PHASE COMM. SIGNAL

MTIC5W (UP98) W PHASE COMM. SIGNAL

AN100 (UP87) W PHASE CURRENT SIGNAL

AN2 (UP75) THERMAL SENSOR SIGNAL

100N

+5V

10K

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