Matrix Orbital GLK19264-7T-1U - Manual (Page 13)

2.1 DB-9 Connector - For Non-USB modules only
The GLK19264-7T-1U provides a DB-9 Connector to readily interface with serial devices which use the
EIA232 standard signal levels of ±30V. It is also possible to communicate at TTL levels of 0 to +5V by
setting the Protocol Select Jumpers to TTL. As an added feature it is also possible to apply power through
pin 9 of the DB-9 Connector in order to reduce cable clutter. However, in order to accomplish this you must
set the Power Through DB-9 Jumper.
Pin 2 TX/SDA (I2C data)
Pin 3 RX/SCL (I2C clock)
Pin 5 GND
Pin 9 PWR (Must solder power through
DB-9 jumper. See table ?? on
page ?? for power requirements.)
Figure 13: RS-232 Pin-out
2.1.1 Power Through DB-9 Jumper - for Non-USB modules only
In order to provide power through pin 9 of the DB-9 Connector you must place a solder jumper on the
Power through DB-9 Jumper pictured in Figure 14 below. The GLK19264-7T-1U allows all voltage models
to use the power through DB-9 option, see table ?? for display module voltage requirements.
Figure 14: Power Through DB-9 Jumper
Matrix Orbital GLK19264-7T-1U 8