Tiles, Sockets, Connectors, Controls
The TPP2 board features 6 x "M" and (6+1) x "C" sockets.
Sockets (S1) ~ (S12) form 3 standard tiles.
There are 24 control lines connecting "M" sockets to the CPU -- four per each socket.
"M" sockets (S1), (S3), (S5), and (S7) have the UART capability.
"M" sockets (S1), (S3), (S5), (S7), (S9), and (S10) have the interrupt capability.
"M" socket (S11) has the PoE capability, provided that four TPP2 jumpers are set to 1-2 position (see below).
"C" socket (S13) exists exclusively for the installation of the RF connector Tibbit #37. This socket has no other functions.
Four jumpers next to the RJ45 jack define the connection between the "M" socket (S11), "C" socket (S12), and the RJ45 jack:
When the jumpers are in the 1-2 position, four power lines from the RJ45 jack are connected to four I/O lines of (S11). Under this arrangement you can install an M1 PoE device into the (S11), or M2 PoE device into the (S9)-(S11).
When the jumpers are in the 2-3 position, the RJ45 jack is disconnected from the socket (S11). The socket (S11) is instead connected to (S12) in a "standard tile way".