Rainbow-electronics AT89C5122 Manuel d'utilisateur télécharger pdf (Page 29)

29

AT8xC5122/23

4202E–SCR–06/06

Figure 13. AT8xC5122’s CRAM and E2PROM Versions

Reset@

<0000>

EA = 0

PROGRAM

EXTERNAL

PROGRAM

PSEN

Reset@

0000

7FFF

8000

FFFF

32K

ROM

32K

CRAM

<F800>

EA = 1

INTERNAL

INTERNAL

32K

PROGRAM

EXTERNAL

ENBOOT=1

ENBOOT=0

8000

FFFF

MEMORY

On-chip

512 bytes

XRAM

0000

01FF

FFFF

RD WR

DATA MEMORY

(Read / Write)

0000

EXTRAM=0

EXTRAM=1

EXTERNAL

EXTERNAL

XRAM

XRAM

01FF

0200

PSEN

Roll-Over

Roll-Over

MEMORY

MEMORY

32K

INTERNAL

E2PROM

(Read/Write)

(Read Only)

(Read/Write)

SFR

Space

80

FF

00

7F

80

FF

Upper

128 Bytes

RAM

Lower

128 Bytes

RAM

On-Chip 256 bytes RAM

Direct

Addressing

Indirect

Addressing

512 Bytes

INTERNAL

E2PROM

01FF

0000

Optional

FFFF

8000

(applicable only to CRAM version)

(E2PROM version)

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 212 213

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