Thingmagic M6e Manual de usuario descargar pdf (Pagina 26)

Hardware Interfaces

A DIVISION OF TRIMBLE

26 Hardware Overview

logic level UART supports complete functionality. The USB port supports complete

functionality except the lowest power operational mode.

Note

Power Consumption 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 USB Interface, 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

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Thingmagic M6e Manual de usuario Pagina 26