XC2000 datasheet(64/647 Pages) INFINEON

64 / 647 page

XC2000 Derivatives

System Units (Vol. 1 of 2)

Memory Organization

Preliminary

User’s Manual

3-2

V1.0, 2007-06

MemoryX2K, V1.1

The XC2000 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).

Bytes are stored at even or odd byte addresses. Words are stored in ascending memory

locations with the low byte at an even byte address being followed by the high byte at

the next odd byte address (“little endian”). Double words (code only) are stored in

ascending memory locations as two subsequent words. Single bits are always stored in

the specified bit position at a word address. Bit position 0 is the least significant bit of the

byte at an even byte address, and bit position 15 is the most significant bit of the byte at

the next odd byte address. Bit addressing is supported for a part of the Special Function

Registers, a part of the internal RAM and for the General Purpose Registers.

Figure 3-2

Storage of Words, Bytes and Bits in a Byte Organized Memory

Note: Byte units forming a single word or a double word must always be stored within

the same physical (internal, external, ROM, RAM) and organizational (page,

segment) memory area.

xxxx’xxxF

xxxx’xxx0

xxxx’xxx1

xxxx’xxx2

xxxx’xxx3

xxxx’xxx4

xxxx’xxx5

xxxx’xxx6

xxxx’xxx7

xxxx’xxx8

xxxx’xxx9

xxxx’xxxA

Double Word (Low Byte)

Double Word (Second Byte)

Double Word (Third Byte)

Double Word (High Byte)

Word (Low Byte)

Word (High Byte)

Byte

… Bits ...

imb_endianess.vsd:byte_orga

XC2000 Datasheet(PDF) 64 Page - Infineon Technologies AG

XC2000 Datasheet(HTML) 64 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL