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895132-IL Datasheet(PDF) 11 Page - ATMEL Corporation |
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895132-IL Datasheet(HTML) 11 Page - ATMEL Corporation |
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11 / 182 page  11 4173E–USB–09/07 AT89C5132 5. Address Spaces The AT8xC5132 derivatives implement four different address spaces: • Program/Code Memory • Boot Memory • Data Memory • Special Function Registers (SFRs) 5.0.1 Code Memory The AT89C5132 implements 64K Bytes of on-chip program/code memory in Flash technology. The Flash memory increases ROM functionality by enabling in-circuit electrical erasure and pro- gramming. Thanks to the internal charge pump, the high voltage needed for programming or erasing Flash cells is generated on-chip using the standard VDD voltage. Thus, the AT89C5132 can be programmed using only one voltage and allows in application software programming commonly known as IAP. Hardware programming mode is also available using specific pro- gramming tools. 5.0.2 Boot Memory The AT89C5132 implements 4K Bytes of on-chip boot memory provided in Flash technology. This boot memory is delivered programmed with a standard bootloader software allowing in sys- tem programming commonly known as ISP. It also contains some Application Programming Interfaces routines commonly known as API allowing user to develop his own bootloader. 5.0.3 Data Memory The AT89C5132 derivatives implement 2304 bytes of on-chip data RAM. This memory is divided in two separate areas: • 256 bytes of on-chip RAM memory (standard C51 memory). • 2048 bytes of on-chip expanded RAM memory (ERAM accessible via MOVX instructions). |
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