MG82FX532AE Datasheet, PDF (31/151 Pages) Megawin Technology Co., Ltd – Dual data pointer

7.4. Declaration Identifiers in a C51-Compiler
The declaration identifiers in a C51-compiler for the various MG82Fx532memory spaces are as follows:
data
128 bytes of internal data memory space (00h~7Fh); accessed via direct or indirect addressing, using instructions
other than MOVX and MOVC. All or part of the Stack may be in this area.
idata
Indirect data; 256 bytes of internal data memory space (00h~FFh) accessed via indirect addressing using
instructions other than MOVX and MOVC. All or part of the Stack may be in this area. This area includes the data
area and the 128 bytes immediately above it.
sfr
Special Function Registers; CPU registers and peripheral control/status registers, accessible only via direct
addressing.
xdata
External data or on-chip expanded RAM (XRAM); duplicates the classic 80C51 64KB memory space addressed
via the ―MOVX @DPTR‖ instruction. The MG82Fx532 has 1024 bytes of on-chip xdata memory.
pdata
Paged (256 bytes) external data or on-chip expanded RAM; duplicates the classic 80C51 256 bytes memory
space addressed via the ―MOVX @Ri‖ instruction. The MG82Fx532 has 256 bytes of on-chip pdata memory
which is shared with on-chip xdata memory.
code
32K bytes of program memory space; accessed as part of program execution and via the ―MOVC @A+DTPR‖
instruction. The MG82Fx532 has 32K bytes of on-chip code memory.
MEGAWIN
MG82FE/L532 Data Sheet
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