![background image](http://html1.mh-extra.com/html/texas-instruments/ads1244evm/ads1244evm_user-manual_1094281015.webp)
2-2
2.1
I/O Connectors and Testpoints
The positions and functions of the connectors and testpoints are shown in
Figure 2−1.
Figure 2−1. Connectors and Jumpers
Many of the pins on the connectors are not used. On the pinout diagrams, un-
used pins are not marked. In the pin description tables, unused pins are not
listed, and ground pins are listed together, with the exception of the power con-
nector.
J1, J5, and J6, though treated as a single connector, are actually mounted as
connector pairs in a pass−through configuration. Each pair has a male sur-
face−mount header on the top (component) side of the board, and a corre-
sponding female surface−mount socket on the bottom (solder) side of the
board. The headers, mounted on top, are suffixed A, and the sockets, mounted
on bottom, are suffixed B.
In the schematic, the connector pairs are shown as one symbol. For J1, J5,
and J6, all bottom−side pins are connected to their corresponding top−side
pins; for example, J1B pin 1 connects to J1A pin 1, J1B pin 2 connects to J1A
pin 2, etc. This scheme is used with every pin on connectors J1, J5, and J6.
In the following descriptions, we will treat the connector pairs as a single con-
nector.