hi Experts
i am not good at English, please understand
i designed a custom board with P1011 almost 8 year ago,
i used well this board in many place, the board has 16-bit SRAM ( IS62WV512) and MRAM , until now i used these Memory with 16bit read /write access without problems
now i was asked to acces these IC with 8 bit access, when i designed that borad , i connected P1011 LWB0, LWEB1 singals to RAM IC through CPLD, ( until now , i didn't use LWB0,1 signals , just used WR singal to enable byte access signal of RAM IC),
i modified CPLD so i connected LWB0 to Low-Byte-Control singal of IC and LWB1 to Upper-Byte-Control signal
but when i access these ic, only LWB0 signal is active , LWB1 is not active , this LWB1 is always Low unlike LWB0 ( LWB0 is high when powered up)
i read reference manuals but have not found useful information.
do i configure PIN before use LWB1 singla of P011 , any hint and idea will be of great help
thank you in advance ,
sincerely
