6995 - ECP5:How to resolve issues regarding failure in reconfiguration using PROGRAMN when using Serial Configuration Mode?

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• 1681 - MachXO2: What happens if the PROGRAMN pin is toggled before device configuration is completed when in SPI configuration mode?

  The PROGRAMN pin is used by the MachXO2 configuration logic to initiate programming of the device. Generally this pin is held inactive high during configuration. In the MachXO2, SPI configuration will restart when PROGRAMN is toggled during ...

• 1323 - Is PROGRAMN pin independent of JTAG programming operations? <br>

  The PROGRAMN pin does not affect the JTAG state machine or boundary scan cells. However, the PROGRAMN pin does clear the SRAM configuration memory of the device. Because of this, a logic low signal on PROGRAMN pin at any time during JTAG ...

• 3817 - LatticeXP2: Is the download/configuration time from Internal/External SPI Flash different while using Dual Boot Mode in LatticeXP2 device?

  While using Dual Boot Mode, the configuration time (time required for the bitstream to get configured inside the device) from Internal Flash is less. Data transfer is faster because the Internal Flash interface with SRAM is parallel, whereas it is a ...

• 1766 - LatticeECP3: Is the LatticeECP3 SCM(Serial Configuration Mode) similar to&nbsp;LatticeECP2&nbsp;slave serial programming mode?

  Yes, the LatticeECP2 slave serial programming mode and the LatticeECP3 SCM modes are identical. Both modes use a simple 2-pin interface(CCLK and DIN). The details of these programming modes are described in the LatticeECP3 sysCONFIG Usage guide and ...

• 1263 - Can the PROGRAMN pin be held low for a period of time during power-up to prevent the FPGA from configuring?

  Yes, PROGRAMN pin can be used to hold FPGA from configuring. The are cases where user is using SPI programming mode and would like to control the exact time to begin configuration with PROGRAMN pin. Lattice FPGA enter configuration mode when one of ...