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Communication Interfaces
The RT211 can communicate with the host device via any of the following interfaces:
TTL-232: This interface is applicable to most system architectures. For those requiring RS-232, a TTL-232 to
RS-232 conversion circuit is needed. The RT211’s TTL-232 interface supports baud rates from 1200bps to
115200bps; it does not support hardware or software flow control. Its default settings are 9600bps, 8 data bits,
no parity check and1 stop bit.
USB HID Keyboard: Based on USB connection, the engine’s transmission is simulated as USB keyboard
input. It works on a Plug and Play basis and no driver is required.
USB COM Port Emulation: The USB port on the host device is emulated as a serial port with the same data
transmission and configuration as a real serial port. A driver is required.
HID-POS (optional):
HID-POS does not require a custom driver. However, an HID interface on Windows 98
does. All HID interfaces employ standard driver provided by the operating system. Use defaults when
installing the driver. (Important note: if you need HID-POS mode, please do confirm with RTscan before
your order, the hardware is a little different with other interfaces)
