Matrix Orbital GTT70A - Manual (Page 10)

GTT70A Hardware Manual 6
4.2 Extended Serial Communication/Power Header
The communication/power header provides an interface for the two most common GTT70A protocols:
RS232 and TTL. With the ability to connect to a PC serial port or microcontroller and optional hardware
flow control, this is the most versatile header available on the GTT70A.
Figure 9: Extended Communication/Power Header
Table 4: Extended Communication/Power Pinout
Pin Function
6 RTS
5 CTS
4 Gnd
3 Tx
2 Rx
1 Vcc
Voltage is applied through pins one and four of the header, please reference electrical specifications
before applying power. Pins two and three are reserved for serial transmission using either RS-232/TTL
levels, depending on what model has been ordered. Finally, pins five and six are used for optional
hardware flow control. The Serial Molex 22-04-1061 style header used can be mated to a number of
connectors, including a 22-01-1062.
4.3 Mini-B USB Communication Connector
USB protocol offers an easy connection to any host computer. The simple and widely available protocol
can be accessed using the familiar Mini-B USB connector to fulfill communication needs.
Figure 10: Mini USB Connector
Table 5: Mini USB Pinout
Pin Function
1 Vcc
2 D-
3 D+
5 Gnd
The USB model can be connected to virtually any USB host using the appropriate cable; however,
additional power must be supplied through the alternate power header. Most commonly used with a
PC, this connection creates a virtual com port that offers a simple power solution with a familiar
communication scheme.