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genesys:refmanual [2014/09/12 19:14] – [Expansion Connectors] Joshua Woldstadgenesys:refmanual [2022/10/04 11:38] (current) – external edit 127.0.0.1
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 ====== Expansion Connectors ====== ====== Expansion Connectors ======
  
-The Genesys board offers two 68-pin VHDC connectors for high-speed parallel I/O, and four 8-pin Pmod connectors for lower speed and lower pin-count I/O. Data sheets for VHDC connectors can be found on the Digilent website and on many vendor and distributor websites as well. +The Genesys board offers two 68-pin VHDC connectors for high-speed parallel I/O, and four 8-pin Pmod ports for lower speed and lower pin-count I/O. Data sheets for VHDC connectors can be found on the Digilent website and on many vendor and distributor websites as well. 
  
 The VHDC connectors include 40 data signals (routed as 20 impedance-controlled matched pairs), 20 grounds (one per pair), and eight power signals. These connectors, commonly used for SCSI-3 applications, can accommodate data rates of several hundred megahertz on every pin. Both board-to-board and board-to-cable mating connectors are available. Digilent and several distributors carry mating connectors and cables of various lengths. The VHDC connectors include 40 data signals (routed as 20 impedance-controlled matched pairs), 20 grounds (one per pair), and eight power signals. These connectors, commonly used for SCSI-3 applications, can accommodate data rates of several hundred megahertz on every pin. Both board-to-board and board-to-cable mating connectors are available. Digilent and several distributors carry mating connectors and cables of various lengths.
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-Pmods use 2x6 right-angle, 100-mil connectors that mate with standard 2x6 pin headers available from a variety of catalog distributors. Each 12-pin Pmod connector provides two VCC signals (pins 6 and 12), two Ground signals (pins 5 and 11), and eight logic signals. VCC and Ground pins can deliver up to 1A of current, and a jumper block is available for each connector to choose the VCC voltage: regulated 3.3V or the unregulated board input voltage (VU). Pmod data signals are not matched pairs, and they are routed using best-available tracks without impedance control or delay matching.+Pmods use 2x6 right-angle, 100-mil connectors that mate with standard 2x6 pin headers available from a variety of catalog distributors. Each 12-pin Pmod port provides two VCC signals (pins 6 and 12), two Ground signals (pins 5 and 11), and eight logic signals. VCC and Ground pins can deliver up to 1A of current, and a jumper block is available for each connector to choose the VCC voltage: regulated 3.3V or the unregulated board input voltage (VU). Pmod data signals are not matched pairs, and they are routed using best-available tracks without impedance control or delay matching.
  
 {{ :genesys:exp3.png?600 |}} {{ :genesys:exp3.png?600 |}}
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 Digilent produces a large collection of accessory boards that can attach to the Pmod and VHDC expansion connectors to add ready-made functions like A/D’s, D/A’s, motor drivers, sensors, cameras and other functions. See www.digilentinc.com for more information. Digilent produces a large collection of accessory boards that can attach to the Pmod and VHDC expansion connectors to add ready-made functions like A/D’s, D/A’s, motor drivers, sensors, cameras and other functions. See www.digilentinc.com for more information.
  
-|  **Pmod Connector Pinouts**                                                                        ||||||||+|  **Pmod Port Pinouts**                                                                        ||||||||
 |  **Pmod A**                         ||  **Pmod B**         ||  **Pmod C**         ||  **Pmod D**         || |  **Pmod A**                         ||  **Pmod B**         ||  **Pmod C**         ||  **Pmod D**         ||
 | Signal                       | Pin   | Signal       | Pin   | Signal       | Pin   | Signal       | Pin   | | Signal                       | Pin   | Signal       | Pin   | Signal       | Pin   | Signal       | Pin   |