User Manual

Command Summary 9

4 Hardware

4.1 Standard Model

Extended Communication/Power Header

Figure 7: Extended Communication/Power Header

Table 4: Extended Communication/Power Pinout

Function

Vcc

Rx (SCL)

Tx (SDA)

Gnd

CTS

RTS

The Extended Communication/Power Header provides a standard connector for interfacing to the

GLK240128-25/GLT240128. 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

Voltage Specifications 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. Pins five and six can be used for serial transmission hardware

flow control, and are ignored for I²C communications. The Molex 22-04-1061 style header used can be

mated to a number of connectors, a 22-01-1062 for example.

Serial DB9 Connector

Figure 8: Serial DB9 Connector

Table 5: Serial DB9 Pinout

Function

Gnd

CTS

RTS

NC/Vcc*

The GLK240128-25/GLT240128 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.