AT89C5132-ROTUL datasheet(17/181 Pages) ATMEL

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4173D–USB–02/06

AT89C5132

Program/Code Memory

The AT89C5132 implements 64K Bytes of on-chip program/code memory. Figure 7-1 shows the

split of internal and external program/code memory spaces depending on the product.

The Flash memory increases EPROM and ROM functionality by in-circuit electrical erasure and

programming. The high voltage needed for programming or erasing Flash cells is generated on-

chip using the standard V

DD voltage, made possible by the internal charge pump. Thus, the

AT89C5132 can be programmed using only one voltage and allows in application software pro-

gramming. Hardware programming mode is also available using common programming tools.

See the application note ‘Programming T89C51x and AT89C51x with Device Programmers’.

The AT89C5132 implements an additional 4K Bytes of on-chip boot Flash memory provided in

Flash memory. This boot memory is delivered programmed with a standard bootloader software

allowing In-System Programming (ISP). It also contains some Application Programming Inter-

faces (API), allowing In Application Programming (IAP) by using user’s own bootloader.

Figure 7-1.

Program/Code Memory Organization

7.1

Flash Memory Architecture

As shown in Figure 7-2 the AT89C5132 Flash memory is composed of four spaces detailed in

the following paragraphs.

Figure 7-2.

AT89C5132 Memory Architecture

4K Bytes

Boot Flash

FFFFh

F000h

0000h

64K Bytes

Code Flash

FFFFh

F000h

FFFFh

64K Bytes

Flash Memory

0000h

Hardware Security

User

4K Bytes

Flash Memory

FFFFh

F000h

Boot

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