C167CS-4RM datasheet(38/517 Pages) INFINEON

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C167CS

Derivatives

Memory Organization

User’s Manual

3-1

V2.0, 2000-07

Memory Organization

The memory space of the C167CS is configured in a “Von Neumann” architecture. This

means that code and data are accessed within the same linear address space. All of the

physically separated memory areas, including internal ROM/Flash/OTP (where

integrated), internal RAM, the internal Special Function Register Areas (SFRs and

ESFRs), the address areas for integrated XBUS peripherals and external memory are

mapped into one common address space.

The C167CS provides a total addressable memory space of 16 MBytes. This address

space is arranged as 256 segments of 64 KBytes each, and each segment is again

subdivided into four data pages of 16 KBytes each (see Figure 3-1).

Figure 3-1

Address Space Overview

MCA04325

Begin of

Prog. Memory

above 32 KB

255

128

254...129

127

126...65

62...12

Internal

ROM

Area

00’0000

01’FFFF

0A’FFFF

40’0000

80’0000

FF’FFFF

Data Page 2

Data Page 3

Alternate

ROM

Area

255...2

02’FFFF

08’0000

00’0000

01’0000

01’8000

01’FFFF

Total Address Space

16 MByte, Segments 255...0

Segments 1 and 0

64 + 64 Kbyte

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