Due to a problem in the Intel® Quartus® Prime Pro Edition software version 20.4 and earlier, The TG2 tool may hang or show incorrect readdata when used in sequential mode. This issue occurs because when writing a burst of data starting at an address within the last 127 address space, with a burstlength of 127, the TG2 will attempt to write data to addresses that fall outside the memory module, causing an overflow.
This issue only occurs when using sequential mode. However, when using random mode or random-sequential mode, the TG2 accounts for the burstlength when generating the memory address to avoid overflow.
This problem is fixed starting with the Intel® Quartus® Prime Pro Edition Software version 21.1.