• how to access ERAM in AT89LP51RD2
    How to access ERAM(2 KB on chip memory) in AT89lp51rd2? I have added following code to STARTUP.A51 file. XDATALEN EQU 7FFH ANL AUXR1,#NOT 02H ; AUXR1/Bit 1 (clear to 0 to enable on-chip XRAM)....
  • Access to ERAM in AT89C51CC03
    The Atmel AT89C51CC03 contains 256 bytes of RAM and 2048 bytes of ERAM What kind of memory access is the fastest? Is also the lower part (128 byes) of the RAM faster than the upper part? How do...
  • ERAM and P2
    I am going to use the Philips P89C668 which has 64k flash and 8k ERAM. This allow me to use P0 and P2 for I/O since no external memory chip will be connected. However, if the compiler generates code using...
  • about ERAM
    Hi, Where is ERAM class located? I know that ERAM is copied to RAM at startup but before it is located at ROM, is it RIGHT? But I don't know where in the ROM and its size, can you help me with this...
  • OnChip ERAM and External RAM access from C51
    I am using AT89C5131 uC with hardwaired external 32K RAM from address 0x0000 to 0x07fff. I am able to read/write OnChip 1K RAM and External connected RAM by toggling EXTRAM Bit in AUXR register. ...