Technical data
Copyright © Siemens AG 2013. All rights reserved. 21 EB 200P Manual
Technical data subject to change Version 1.0.1
2.3.4 User GPIOs with LEDs and switch
16 GPIOs are available for the user via 2x10 pin header. GND and 3.3V pins are available on this pin header too.
These 16 pins can be connected or disconnected to/from ERTEC 200P GPIOs by bidirectional bus switch
(SN74CB3Q3384). Pin out for pin header and jumper configuration for test and debug circuits are described in chapter
2.1.2. To each GPIO available on pin header a LED is connected via buffer (SN74ALVCH16244DGGR). If pins are
connected to ERTEC and output direction is set the LED will signalize output state. If input direction is selected the
LED will signalize input signal. Octal slide switch is connected to user GPIO(0..7). The opposite contact of slide switch
is connected to 3.3V (via 470 protection resistor for each slide switch). The following table describes connections
between user GPIO pin header and ERTEC’s GPIOs (via bus switch).
User pin
Connection
Pull down
Switch
GPIO0
GPIO(0) 4.7k SW0
GPIO1
GPIO(1) 4.7k SW1
GPIO2
GPIO(2) 4.7k SW2
GPIO3
GPIO(3) 4.7k SW3
GPIO4
GPIO(4)
4.7
k
SW4
GPIO5
GPIO(5) 4.7k SW5
GPIO6
GPIO(6) 4.7k SW6
GPIO7
GPIO(7) 4.7k SW7
GPIO8
GPIO(16) 4.7k None
GPIO9
GPIO(17) 4.7k None
GPIO10
GPIO(18) 4.7k None
GPIO11
GPIO(19) 4.7k None
GPIO12
GPIO(20) 4.7k None
GPIO13
GPIO(21) 4.7k None
GPIO14
GPIO(22) 4.7k None
GPIO15
GPIO(23) 4.7k None
Table 13 User GPIO connection
2.3.5 UART over USB
For debug purposes the UART-USB convertor is integrated on board. The TUSB3410 from TI is used. Connection
with ERTEC is described in the following table. USB-UART convertor can be connected or disconnected to/from
ERTEC by bidirectional bus switch. Configuration is done by jumper.
Signal Signal function Dir Connection Note
SIN
Data In TXD(2) GPIO(14) Pull up 10k to 3.3V
SOUT Data Out
RXD(2) GPIO(15)
RTS Ready to send Out
CTS(2) GPIO (12)
CTS
Clear to send In RTS(2) GPIO(13) Pull up 10k to 3.3V
Table 14 USB UART convertor connection
Assigned USB identification IDs:
USB PID = 0x040E
USB VID = 0x0908
Note: EB200P must be powered prior plugging USB cable in PC USB port.