1943 - MachXO: With no DONE bit, how can I use JTAG to see if the SRAM download from flash is finished?
The way to check the MachXO configuration status through JTAG is to use the capture instruction. For the MachXO the capture instruction (which is the instruction shifting out of the instruction register) is 0x19 (if the device is blank) or 0x1D (if the device is programmed). Bit #3 will tell the programming status.
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5553 - Why in LCMXO2 part I got the following error message: ERROR - Failed in Function VERIFY_SRAM_DONE_BIT ?
The "Failed in Function VERIFY_SRAM_DONE_BIT" means that, the Diamond Programmer is unable to determine the statue of the DONE bit in the device's Status Register. This could have happened due to following reasons: The DONE bit is NOT SET due to the ...
6179 - How do user program Lattice FPGA after programming a bitstream to the SPI Flash with JTAG_PORT and MASTER_SPI_PORT set to DISABLED?
Description: When JTAG_PORT and MASTER_SPI_PORT is set to DISABLED, user can no longer access the configuration logic through JTAG and MSPI Port. Thus, user can't perform programming with the interface. Solution: To workaround on this, user can ...
1646 - LatticeXP2: Can we program the internal SRAM via SSPI port?
No. The SSPI port can only configure the LatticeXP2 flash or read from the LatticeXP2 SRAM. The SSPI port can not write to the LatticeXP2 SRAM. The SRAM can be configured using JTAG, the external Master SPI port, or by using the data stored in ...
Why FPGA Programming Failure When JTAG Chain Has 7 or More Devices?
DESCRIPTION When programming Lattice FPGA devices via SPI Flash using a JTAG chain, the Erase-Program-Verify (EPV) operation fails deterministically starting from the 7th device in the chain. Chains of 6 devices or fewer complete SPI Flash EPV ...
2115 - MachXO2/XO3: While programming the Lattice MachXO2 device using JTAG pins, is it recommended to provide connections to the DONE, INITN, and PROGRAMN pins of the device, or are TCK, TMS, TDI, and TDO sufficient?
In Lattice MachXO2/XO3 devices, JTAG ports can access both Flash and SRAM Memory. Therefore, it is not necessary to use INIT, DONE and PROGRAMN pins. TCK, TMS, TDI and TDO pins are sufficient to program and configure the device. For more details, ...