Datasheet

AT89C5132

4173C–USB–07/04

Address Spaces The AT8xC5132 derivatives implement four different address spaces:

• Program/Code Memory

• Boot Memory

• Data Memory

• Special Function Registers (SFRs)

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 programming. Thanks to the internal charge pump, the high voltage needed for pro-

gramming or erasing Flash cells is generated on-chip using the standard V

DD voltage.

Thus, the AT89C5132 can be programmed using only one voltage and allows in applica-

tion software programming commonly known as IAP. Hardware programming mode is

also available using specific programming tools.

Boot Memory The AT89C5132 implements 4K Bytes of on-chip boot memory provided in Flash tech-

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

allowing in system programming commonly known as ISP. It also contains some Appli-

cation Programming Interfaces routines commonly known as API allowing user to

develop his own bootloader.

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).