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Difference and significance between on chip RAM on-chip XRAM Have you looked at the instruction set for the processor? Time to do that now I would advise that the OP start with the 80C51 family architecture and 80C51 hardware description documents to learn what the difference between the various memory types is before reading the programmers guide
XRAM and Memory Model - Keil forum - Arm Community - Check Boxes "Use On-Chip ROM (0x0-0xF7FF)" and "Use On-Chip XRAM (0x-0x7FF)" doesn't change uC configuration, It only configure uVision Simulator - If you want to use XRAM, you need congirue your uC using START_AD A51 and modify it to indicate to compiler that your uC has XRAM available I've change this three lines: XRAMEN EQU 1 EXSP EQU 1
On-Chip XRAM Question - Keil forum - Arm Community Dear Sir, It may be a simple question I am using Atmel AT89C51ID2 for the development The MCU having 256 Bytes Scratch Pad RAM and 1792 bytes on-chip XRAM
On chip XRAM confusion - Keil forum - Arm Community So let me see if I have this straight To use the 2Kbytes On chip XRAM (accessed as XDATA memory space) on a ADuC831, I need to 1) Copy START_AD A51 into my project folder 2) Add this file to my project so that it will be used on startup as opposed to the STARTUP A51 file 3) Make sure that the START_AD A51 has the XRAM enable bit set to 1
C51: How calling library in fixed ROM from code in XRAM I have a 8051 project which includes ROM and XRAM, both are used as code memory The memory address and range is as follows CODE Space Main CODE at RAM C:0x0000 ~ C:0x2FFF Lib CODE at ROM C:0x3000 ~ C:0x3FFF XDATA Space XDATA RAM at X:0x0000 ~ X:0x0FFF I want to build a library code by Keil C51, and put the library code in fixed ROM memory,
XRAM, XDATA adress space overlap - Keil forum - Arm Community NXP(Philips) P89v51RD2 has extra 768bytes of internal data memory (XRAM) that is accessed indirectly with MOVX instruction Address range for XRAM is 0x0000h to 0x02ffh The external data memory (XDATA) address range is 0x0000h-0xffffh The MCU accesses the external memory if 1) address is 0x0300h or larger 2) AUXR bit 1 (EXTRAM) is set to 1
xdata expanded ram( xram) - Keil forum - Arm Community xram Is there any keyword to define variables seprately in xdata and xram at compile time ____following variable i am defining in nvram unsigned long int xdata sector_location _at_ 0x0001; int xdata sector_number _at_ 0x0005; unsigned char xdata starting_info[10] _at_ 0x0007; unsigned char xdata memory_space[65535] _at_ 0x0000;
On-Chip XRAM Usage Problem - Keil forum - Arm Community Our application have not been using On-Chip XRAM (0x0-0x3FF) so far but we need to use it now Our Off-Chip XData memory is located on the adress of 0x4000 with the length of 0x4000 We added On-Chip XRAM block (located on the address of 0x0000 with the length of 0x0400) to this area by means of 'Project Options' dialog box of the Keil environment
How to use w78e58bs xram? - Keil forum - Arm Community Just to remind you, on ICE you have to use the ICE XRAM or Taget XRAM to simulate the AUX-RAM PPAGEENABLE EQU 1 ; set to 1 if pdata object are used ; After AUX-RAM enabled, the instructions of "MOVX @Ri" will always access on-chip AUX-RAM ; when burning the code into a chip, P2's page number doesn't matter PPAGE EQU 00H ; define PPAGE number