ThingMagic M6e User Manual
Page 26
Hardware Interfaces
A D I V I S I O N O F T R I M B L E
26
Hardware Overview
logic level UART supports complete functionality. The USB port supports complete
functionality except the lowest power operational mode.
Note
specifications apply to control via the TTL UART.
Note
It is not recommended to use the TTL interface when planning to operate the
module in
Tag Streaming/Continuous Reading
mode. The TTL interface (both the
module side and the host side) cannot detect physical disconnections, as
can the
, simplifying reconnection.
TTL Level TX
V-Low: Max 0.4 VDC
V-High: 2.1 to 3.3 VDC
8 mA max
TTL Level RX
V-Low: -0.3 to 0.6 VDC
V-High: 2.2 to 5 VDC
(Tied to ground through a 10kOhm pull-down resistor.)
A level converter could be necessary to interface to other devices that use standard 12V
RS232. Only three pins are required for serial communication (TX, RX, and GND).
Hardware handshaking is not supported. The M6e serial port has an interrupt-driven
FIFO that empties into a circular buffer.
The connected host processorʼs receiver must have the capability to receive up to 256
bytes of data at a time without overflowing.
Baud rates supported:
– 9600
– 19200
– 38400
– 115200
– 230400
– 460800
– 921600