9
4.2
I2C Model
4.2.1
Standard Communication/Power Header
Figure 10: Extended Communication/Power Header
Table 3: Standard Communication/Power Pinout
Pin Function
1
Vcc
2
Rx (SCL)
3
Tx (SDA)
4
Gnd
The Standard Communication/Power Header provides a more simplistic connection to the GTT480272A-
I2C. Voltage is applied through pins one and four of the header. Again, please ensure the correct voltage
input for your display by referencing the electrical specifications in Table 11 before applying power. Pins
two and three are reserved for clocking data through the I²C protocol. Pins five and six are used for
serial transmission hardware flow control, and ignored for I²C communications. The Tyco 640456-4-LF
style headers used can be mated to a number of connectors.
4.2.2
Mini USB Communication Connector
Figure 11: Mini USB Connector
Table 4: Mini USB Pinout
Pin Function
1
Vcc
2
D-
3
D+
5
Gnd
The GTT480272A-I2C also comes with a Mini-B USB connector for development and debugging
purposes. By removing the I2C.cfg file from the SYSTEM directory, the GTT480272A-I2C can be
interfaced to a PC through a standard USB cable. This connection creates a virtual com port that offers a
proven communication scheme while developing in I2C.
