Matrix Orbital GLK12232-25, Technical Manual, Page: 12 / 41

12 Command Summary
4 Hardware
4.1 Standard Model
I
2
C Communication/Power Header
Figure 8: I2C Communication/Power Header
Table 4: I
2
C Communication/Power Pinout
Pin Function
1 Vcc
2 Rx (SCL)
3 Tx (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.
4.2 USB Model
Mini USB Connector
Figure 9: Mini USB Connector
Table 5: Mini USB Pinout
Pin Function
1 Vcc
2 D-
3 D+
5 Gnd
The GLK12232-25-USB -USB comes with a familiar Mini USB Connector to fulfill both communication and
power needs. The standard MiniB style header can be connected to any other USB style using the
appropriate cable. Most commonly used with a PC, this connection creates a virtual com port that
offers a simple power solution with a familiar communication scheme.
Alternate USB Header
Some advanced applications may prefer the straight four pin connection offered through the Optional
Alternate USB Header. This header offers power and communication access in a simple interface
package. The Optional Alternate USB Header may be added to the GLK12232-25-USB for an added
charge as part of a custom order. Please use the Contact section to request more information from the
friendly Matrix Orbital sales team.