Matrix Orbital GTT38A - Manual (Page 12)

GTT38A Hardware Manual 8
4.2 I 2 C Communication/Power Header
A dedicated I
2
C header is available on RS232 and TTL GTT38A models and provides the most basic
protocol connection to the unit.
Figure 13: I
2
C Communication/Power Header
Table 7: I
2
C Communication/Power Pinout
Pin Function
1 Vcc
2 SCL
3 SDA
4 Gnd
Voltage is applied through pins one and four of the header, please reference the electrical specifications
before applying power. Pins two and three are reserved for I
2 C clock and data signals respectively, both
of which should be pulled up to five volts using a resistance between one and ten kilohms. The Tyco
640456-4-LF style header used can be mated to a number of connectors, including Molex 22-01-3047.