REFERENCE DESIGN

IRMCS2011

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9. Appendix

9.1 External I/O

Connect External I/O Connector (J7) as needed. All inputs are 5V tolerant and high true logic.

Pin definition

Pin 1: Analog input (+/-10V)

GND

5V

GND

16

15

2

1

J7 Top View

IFBCAL

START

FLTCLR

STOP

User supplied

power supply

GND

-10V

+10V

10k ohm

potentiometer

GND

Pin 2: Analog GND

Pin 3: N/A (open)

Pin 4: N/A (open)

Pin 5: N/A (open)

Pin 6: Digital GND

Pin 7: FAULT status output (3.3V when FAULT)

Pin 8: SYNC status output (3usec width of active low

pulse at every carrier frequency period)

Pin 9: PWMACTIVE output (3.3V when PWM active)

Pin 10: +5V

Pin 11: START input (high to activate)

Pin 12: STOP input (high to activate)

Pin 13: Ifb offset calibration input (high to activate)

Pin 14: Fault Clear input (high to activate)

Pin 15: N/A (open)

Pin 16: Digital GND

Figure 14. External I/O Connector, J7

9.2 RS232C Connector

IRMCS2011 has one serial RS232C connector (J6) on the board. The connector is D-sub 9 pin standard PC female

connector and directly connectable to PC serial port. As shown in Figure 15, pin 2 is send-signal and pin 3 is

receive-signal, and both are 10V signal level. The baud rate is fixed at 57.6 kbps. The signal format is 8 bits, no

parity, 1 stop bit.

J6

DB9RF

1

2

3

4

5

6

7

8

9

No connection

RX1

TX1

Figure 15. RS232C Connector, J6