XC2000 datasheet(40/647 Pages) INFINEON

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XC2000 Derivatives

System Units (Vol. 1 of 2)

Architectural Overview

Preliminary

User’s Manual

2-12

V1.0, 2007-06

ArchitectureX2K, V1.0

Hardware detection of the selected memory space is placed at the internal memory

decoders and allows the user to specify any address directly or indirectly and obtain the

desired data without using temporary registers or special instructions.

For Special Function Registers three areas of the address space are reserved: The

standard Special Function Register area (SFR) uses 512 bytes, while the Extended

Special Function Register area (ESFR) uses the other 512 bytes. A range of 4 Kbytes is

provided for the internal IO area (XSFR). SFRs are wordwide registers which are used

for controlling and monitoring functions of the different on-chip units. Unused SFR

addresses are reserved for future members of the XC2000 Family with enhanced

functionality. Therefore, they should either not be accessed, or written with zeros, to

ensure upward compatibility.

In order to meet the needs of designs where more memory is required than is provided

on chip, up to 12 Mbytes (approximately, see Table 2-1) of external RAM and/or ROM

can be connected to the microcontroller. The External Bus Interface also provides

access to external peripherals.

Table 2-1

XC2000 Memory Map

Address Area

Start Loc.

End Loc.

Area Size1)

Notes

IMB register space

FF’FF00H

FF’FFFFH

256 Bytes

–

Reserved (Access trap) F0’0000H

FF’FEFFH

<1 Mbyte

Minus IMB reg.

Reserved for EPSRAM

E9’0000H

EF’FFFFH

448 Kbytes

Mirrors EPSRAM

Emulated PSRAM

E8’0000H

E8’FFFFH

64 Kbytes

Flash timing

Reserved for PSRAM

E1’0000H

E7’FFFFH

448 Kbytes

Mirrors PSRAM

Program SRAM

E0’0000H

E0’FFFFH

64 Kbytes

Maximum speed

Reserved for pr. mem.

CC’0000H

DF’FFFFH <1.25 Mbytes –

Program Flash 2

C8’0000H

CB’FFFFH 256 Kbytes

–

Program Flash 1

C4’0000H

C7’FFFFH

256 Kbytes

–

Reserved Sector (PF0)

C3’F000H

C3’FFFFH

4 Kbytes

Used internally

Program Flash 0

C0’0000H

C3’EFFFH 252 Kbytes

–

External memory area

40’0000H

BF’FFFFH

8 Mbytes

–

Available Ext. IO area2) 20’5800H

3F’FFFFH

< 2 Mbytes

Minus USIC/CAN

USIC registers

20’4000H

20’57FFH

6 Kbytes

Accessed via EBC

MultiCAN registers

20’0000H

20’3FFFH

16 Kbytes

Accessed via EBC

External memory area

01’0000H

1F’FFFFH

< 2 Mbytes

Minus segment 0

SFR area

00’FE00H

00’FFFFH

0.5 Kbyte

–

Dual-Port RAM

00’F600H

00’FDFFH

2 Kbytes

–

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