AT89C5132 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C5132

USB Microcontroller with 64K Bytes Flash Memory

Atmel Corporation 

AT89C5132

7. 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 VDD 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

FFFFh

F000h

FFFFh

F000h

4K Bytes

Boot Flash

64K Bytes

Code Flash

0000h

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

FFFFh

Hardware Security

Extra Row

FFFFh

F000h

4K Bytes

Flash Memory

Boot

64K Bytes

Flash Memory

User

0000h

17

4173E–USB–09/07

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