Matrix Orbital GLK24064-25 Legacy - Manual (Page 15)

15
Hardware
Standard Model
Communication/Power Header
Figure 10: Communication/Power Header
Table 6: Communication/Power Pinout
Pin Function
1 Vcc
2 Rx (SCL)
3 Tx (SDA)
4 Gnd
The Communication/Power Header provides a standard connector for interfacing to the GLK24064-
25/GLT24064. Voltage is applied through pins one and four of the four pin Communication/Power
Header. Please ensure the correct voltage input for your display by referencing the electrical
specifications in Table 65 before connecting power. Pins two and three are reserved for serial
transmission, using either the RS-232/TTL or clocking data through the I²C protocol, depending on what
has been selected by the Protocol Select Jumpers. The versatile Tyco 640456-4-LF style header
employed here can be mated to a wide array of female connectors for a perfect fit in any project.
Serial DB9 Connector
Figure 11: Serial DB9 Connector
Table 7: Serial DB9 Pinout
Pin Function
5 Gnd
3 Rx
2 Tx
9 NC/Vcc*
The GLK24064-25/GLT24064 provides a DB-9 Connector to readily interface with serial devices using
EIA232 standard signal levels. 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. A standard male DB9 header will provide the
perfect mate for this connector.
*Note: Do not apply voltage through pin 9 of the DB-9 Connector AND through the Communication/Power Header
at the same time.