WebApr 30, 2010 · The code examples below are in 8051 assembly as well as C to provide a general idea of what is taking place. To enable external interrupt 0 ( EX0) you need to set bit 0 of IE. SETB EX0 or ORL IE,#01 or MOV IE,#01. To enable external interrupt 1 ( EX1) you need to set bit 3 of IE. SETB EX1 or ORL IE,#08 or MOV IE,#08. WebEA : The 8051 family members, such as the 8751/52, 89C51/52, or DS89C4xO, all come with on-chip ROM to store programs. In such cases, the EA pin is connected to Vcc. For …
8051 Memory Organization - ROM and RAM …
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External Memory Interfacing in 8051 Microcontroller
WebApr 11, 2024 · The 8051 microcontroller is a tiny computer developed by Intel in the 1980s. It is used in many electronic systems like cars, medical devices, etc. It has two memory spaces, one for program memory and the other for data memory. The program counter can access up to 64K of program memory, while the data memory has 128 bytes of internal … WebDec 10, 2024 · The Pin 30 of 8051 microcontroller is used for ALE that is Address Latch Enable. It is an active-high input control signal. ALE signal is used for demultiplexing the … WebDec 4, 2014 · The 8051 has several address spaces, so C compilers that target 8051 have extensions to direct which address space each variable belongs in. Also, check whether the linker is targeting the correct 8051 variant. This microcontroller architecture has been around for decades, and there are lots of variations. raw heartwood west chicago