Classic 8051 Memory Layout

Posted on Feb 7, 2014

The CODE and CONST memory classes are typically stored in ROM that may be either off-chip or on-chip. The CODE memory class is used for the actual program code while the CONST memory class is used for constant variables declared in code space. In addition, up to 32 code banks may be used for code banking applications. While these are technically l

Classic 8051 Memory Layout
Click here to download the full size of the above Circuit.

ocated in code space, they are assigned their own address space. The XDATA memory class is typically stored in RAM that may be off-chip or on-chip (on newer devices). It contains external program data (named because it was off-chip on the original 8051 devices) including variables declared with thexdata and pdata memory types.

Leave Comment

characters left:

New Circuits



Popular Circuits

Over-Under Voltage Cut-Out with 555
Microprocessor programmable interval timer
3V Power Supply For Portable Radios
Transistor Checker Circuit
Make circuit of the inverter and operating principle by oneself
switches Wiring a SPDT Relay
battery charger based on avr atmega
AF2310 radio controlled motor circuit design project
4 Band Double Tuned Preselector
The L3 Wire-amplifier NH19-6112
PICs in Space
Professor Mark Csele: Ohio Scientific Computers
25kHz using thyristor inverter welding machine circuit