• 89C51 with internal XRAM and EEPROM
    I am using an 89C51 variant with both intenal XRAM and EEPROM and as such their address space overlaps from 0x0000 to 0x03FF so I have variables declared as follows:- #define size 0x20 /* variables...
  • Large Memory Model and internal XRAM PDATA
    I'm using the ADI ADuC831 and would like to use the lowest 256 bytes of internal XRAM as PDATA. Is there a way to disable the the compiler from setting PORT2.. and assume 0?
  • on-chip xram
    hello everyone, i am quite new to programming 8051..hoping to receive some help.. i have a pointer variable.The address stored in this variable resides in the on-chip XRAM. unsigned char xdata...
  • XRAM specification
    Hello, 1) I am using a Large model for my application. The XRAM area is from 0 to FFFF. Out of this 0-7FFF is used for normal XRAM operations 8000 – F7FF is used Battery backup ram operations for...
  • USERSTACK in XRAM
    I've put the USERSTACK in XRAM (C161 internal ram, 0xE000 to 0xE800) (cf AN Keil APNT_124 + U3 directive). The project work well and execution speed is improved (local variables in XRAM!). But, there...