EM-1240-LX User’s Manual | Introduction |
Serial Console Port
The serial console port is a 4-pin pin-header RS-232 port. It is designed for serial console terminals, which are useful for identifying the EM-1240-LX boot up message.
Serial Console Port & Pinouts | Serial Console Cable |
| | | | | |
4 | | | Pin | Signal | |
| | 1 | TxD | |
3 | | | |
| | 2 | RxD | |
2 | | | |
| | 3 | NC | |
1 | | | |
| | 4 | GND | |
| | | |
Internal SD Socket
The EM-1240-LX provides an internal SD socket for storage expansion. It allows users to plug in a Secure Digital (SD) memory card compliant with the SD 1.0 standard for up to 1 GB of additional memory space. To install an additional SD card, you must first remove the EM-1240-LX’s outer cover to access the slot. The internal SD socket is located at the backside of the EM-1240-LX bottom board; you can find the SD plug-in slot at the right of the EM-1240-LX, lower than the cover screw. Plug the SD card into the socket directly and remember to press the SD card first if you want to take it out. Please note that the SD function shares the same chipset with DIO. If you would like to enable SD function, the DIO must be disabled. If you would like to enable DIO, the SD function must be disabled.
Additional Functions
Reset Button
Press the Reset button on the EM-1240-DK continuously for at least 5 seconds to load the factory default configuration. After the factory default configuration has been loaded, the system will reboot automatically. We recommend that you only use this function if the software is not working properly and you want to load factory default settings. To reset an embedded Linux system, always use the software reboot command />reboot to protect the integrity of data being transmitted or processed. The Reset button is not designed to hard reboot the EM-1240 Development Kit.