The module can be powered by B2B connector J5 or the USB connector. If both power supplies are available, the B2B connector power supply takes precedence, disabling the USB power supply automatically.
Three on-board voltage regulators provide the following power supply rails needed by the components on the module:
The figure below show power supply diagram.
The power rails are available for the FPGA and can be shared with a carrier board by the corresponding lines of the B2B connectors J4 and J5.
Spartan-6 architecture organizes I/Os into four I/O banks, see Table 1 for supply voltage used for each bank.
VCCIO0 voltage can be configured in 3 ways:
See the figure below to locate R102 and R103 on PCB.
Bank | Supply |
---|---|
B0 | VCCIO0 |
B1 | 1.5V |
B2 | 3.3V |
B3 | 3.3V |
Note that some of Spartan-6 I/O types are partially compatible, so pins of compatible types can be used as inputs for signal of other type. See "Spartan-6 FPGA SelectIO Resources" page 38 for detailed information.