22.214.171.124. Programming EPCQ Using the Active Serial Interface
To program an EPCQ device using the AS interface, connect the device as shown in the following figure.
When programming the EPCS and EPCQ devices, the download cable disables access to the AS interface by driving the nCE pin high. The nCONFIG line is also pulled low to hold the Cyclone® V device in the reset stage. After programming completes, the download cable releases nCE and nCONFIG, allowing the pull-down and pull-up resistors to drive the pin to GND and VCCPGM , respectively.
During the EPCQ programming using the download cable, DATA0 transfers the programming data, operation command, and address information from the download cable into the EPCQ. During the EPCQ verification using the download cable, DATA1 transfers the programming data back to the download cable.
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