XC164CS datasheet(20/71 Pages) INFINEON

20 / 71 page

XC164

Derivatives

Functional Description

Data Sheet

V2.1, 2003-06

so-called General Purpose Registers (GPRs).

The upper 256 bytes of the DPRAM are directly bitaddressable. When used by a GPR,

any location in the DPRAM is bitaddressable.

1024 bytes (2

× 512 bytes) of the address space are reserved for the Special Function

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

addresses are reserved for future members of the XC166 Family. 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 3) of external RAM and/or ROM can

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

external peripherals.

Table 3

XC164 Memory Map1)

Accesses to the shaded areas generate external bus accesses.

Address Area

Start Loc.

End Loc.

Area Size2)

The areas marked with “<“ are slightly smaller than indicated, see column “Notes”.

Notes

Flash register space

FF’F000H

FF’FFFFH

4 Kbytes

Flash only3)

Not defined register locations return a trap code.

Reserved (Acc. trap)

F8’0000H

FF’EFFFH

<0.5 Mbytes

Minus Flash regs

Reserved for PSRAM

E0’0800H

F7’FFFFH

<1.5 Mbytes

Minus PSRAM

Program SRAM

E0’0000H

E0’07FFH

2 Kbytes

Maximum

Reserved for pr. mem.

C2’0000H

DF’FFFFH < 2 Mbytes

Minus Flash/ROM

Program Flash/ROM

C0’0000H

C1’FFFFH

128 Kbytes

Reserved

BF’0000H

BF’FFFFH

64 Kbytes

External memory area

40’0000H

BE’FFFFH <8 Mbytes

Minus res. seg.

External IO area4)

Several pipeline optimizations are not active within the external IO area. This is necessary to control external

peripherals properly.

20’0800H

3F’FFFFH

<2 Mbytes

Minus TwinCAN

TwinCAN registers

20’0000H

20’07FFH

2 Kbytes

External memory area

01’0000H

1F’FFFFH

<2 Mbytes

Minus segment 0

Data RAMs and SFRs

00’8000H

00’FFFFH

32 Kbytes

Partly used

External memory area

00’0000H

00’7FFFH

32 Kbytes

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