Article Details

ID: 5249
Case Type: faq
Category: Architecture
Related To: IO
Family: LatticeECP5

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What is the purpose of dual purpose pins in Lattice ECP5-25UM csfBGA285 package? What should be considered when these pins are connected to VCC or GND?

Dual purpose pins can be used to serve more than one function.

For example, SPI pins can be used in programming as well as user I/O. These inputs/outputs are like regular GPIO and are not enabled in user mode, so users need not to be concerned. Dual purpose S0_IN to S7_IN and S0_OUT (in BSDL file) are internally used signals for testing.
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