T89C5115-RATIM datasheet(32/113 Pages) ATMEL

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AT89C5115

4128G–8051–02/08

Program/Code

Memory

The T89C5115 implement 16K Bytes of on-chip program/code memory.

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

sure and programming. Thanks to the internal charge pump, the high voltage needed for

programming or erasing Flash cells is generated on-chip using the standard VDD volt-

age. Thus, the Flash memory can be programmed using only one voltage and allows In-

System Programming (ISP). Hardware programming mode is also available using spe-

cific programming tool.

Figure 12. Program/Code Memory Organization

Flash Memory

Architecture

T89C5115 features two on-chip Flash memories:

•

Flash memory FM0:

containing 16K Bytes of program memory (user space) organized into 128 bytes

pages,

•

Flash memory FM1:

2K Bytes for boot loader and Application Programming Interfaces (API).

The FM0 can be program by both parallel programming and Serial ISP whereas FM1

supports only parallel programming by programmers. The ISP mode is detailed in the

’In-System Programming’ section.

All Read/Write access operations on Flash memory by user application are managed by

a set of API described in the ’In-System Programming’ section.

Figure 13. Flash Memory Architecture

0000h

16K Bytes

3FFFh

Internal

Flash

3FFFh

16K Bytes

Flash Memory

FM0

0000h

Hardware Security (1 byte)

Column Latches (128 Bytes)

User Space

Extra Row (128 Bytes)

2K Bytes

Flash Memory

FM1

Boot Space

FFFFh

F800h

FM1 mapped between F800h and

FFFFh when bit ENBOOT is set in

AUXR1 register

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