EPCQ-L Serial Configuration Devices Datasheet

ID 683710
Date 5/18/2018
Document Table of Contents

Write Non-Volatile Configuration Register Operation (B1h)

You need to write the non-volatile configuration registers for EPCQ-L devices for different configuration schemes. If you are using the .jic file, the Intel® Quartus® Prime programmer sets the number of dummy clock cycles and address bytes. If you are using an external programmer tools (3rd party programmer tools), you must set the non-volatile configuration registers.

To set the non-volatile configuration register, follow these steps:

  1. Execute the write enable operation.
  2. Execute the write non-volatile configuration register operation.
  3. Set the 16-bit register value.

Set the 16-bit register value as b'1110 1110 xxxx 1111 where xxxx is the dummy clock value. When the xxxx value is from 0001 to 1110, the dummy clock value is from 1 to 14. When xxxx is 0000 or 1111, the dummy clock value is at the default value, which is 8 for standard fast read (AS x1) mode and 10 for extended quad input fast read (AS x4) mode.

Figure 6. Write Non-Volatile Configuration Register Operation Timing Diagram

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