I have four TS201, connect each two to be a cluster(DSPA with DSPB->cluster1, DSPC with DSPD->cluster2), every cluster has it's own FLASH and SDRAM. I connect the /RD pins of dspa and dspb together, then connect to /OE pin of FLASH and a I/O pin of FPGA. According to the data sheet, the IO voltage of DSP is 2.5V, when the /OE of FLASH is input and FPGA is high-impedace, I think the voltage of /RD should be 2.5V when reset. However, the voltmeter shows the voltage of /RD is only 1V no matter before or after reset. Could you please give me some advice?
Thanking you in advance for your great help