Understanding Peripheral Modules (PMODs)
Digilent introduced the PMOD connector as a way to provide a standardized interface for its development boards. The goal of the PMOD specification is to allow the development of lower-speed daughter cards, such as I2C, SPI, UART, and General-Purpose Input/Output (GPIO) peripherals. The standard is open and has been adopted by multiple companies both for their development boards and to provide different PMODs for developers.
PMOD connectors primarily provide low-speed connections of a predefined type. In practice, the power connections are the only pins that are constant, and the others could be used for any signaling up to about 100MHz operation, even though this would technically be beyond the original spec.
From the Nexys A7 perspective, four of the PMODs connect to GPIO and the fifth is dual-purpose analog/digital.
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Pin |
PMOD JA |
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