This section describes how the various pins on B2B connectors JM4 and JM5 connect with TE0320 on-board components. In this chapter, most of naming conventions and colour coding scheme are taken from the official Xilinx Spartan-3A DSP documentation.
Pin Labelling
The pin label is abbreviated but descriptive for each pin. All I/O pins begin with IO. If a pin can be used as a differential signal, the name includes an _Lxxy_b suffix, where
L indicates that the pin is part of a differential pair
xx is a two-digit integer, unique for each bank, that identifies a differential pin-pair
y is the signal polarity and is replaced by P for the positive signal or N for the negative. These two pins form one differential pin-pair
b is an integer, 0 through 2 for TE0320, indicating the associated I/O bank.
Dual- or multi-purpose pins have a name composed of the signal names referring to each possible pin function (e. g. IO_L52P_2 / D0 / DIN / MISO). _B is used as the active-Low designator, as in CSI_B.
A differential clock input requires two global clock inputs. The P and N inputs follow the same configuration as for standard inputs on those pins. The clock inputs that get paired together are consecutive pins in clock number, an even clock number and the next higher odd value. For example, GCLK0 and GCLK1 are a differential pair.
Overview
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