MD3331-D64-V3 M-Systems Inc., MD3331-D64-V3 Datasheet - Page 34

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MD3331-D64-V3

Manufacturer Part Number
MD3331-D64-V3
Description
Diskonchip Millennium Plus
Manufacturer
M-Systems Inc.
Datasheet

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6.2
TrueFFS utilizes an 8KB memory window in the CPU address space, consisting of four 2KB sections as depicted in
Figure 15. When in Reset mode, read cycles from sections 1 and 2 always return the value 00H to create a fixed and
known checksum. When in Normal mode, these two sections are used for the internal registers. The 1KB
Programmable Boot Block is aliased twice, in section 0 and section 3, to support systems that search for a checksum
at the boot stage both from the top and bottom of memory. The addresses described here are relative to the absolute
starting address of the 8KB memory window.
34
8KB Memory Window in DiskOnChip Millennium Plus 16/32MB
Figure 15: DiskOnChip Millennium Plus 16/32MB Memory Map
1000H
1800H
000H
800H
Programmable
Programmable
[000H-3FFH]
Reset Mode
[000H-3FFH]
(2 aliases)
boot block
(2 aliases)
boot block
00H
00H
Data Sheet, Rev. 1.7
Section 0
Section 1
Section 2
Section 3
Programmable
Programmable
Normal Mode
[000H-3FFH]
[000H-3FFH]
Flash area
(+ aliases)
(+ aliases)
Registers
boot block
(2 aliases)
boot block
(2 aliases)
window
Control
DiskOnChip Millennium Plus 16/32/64MByte
93-SR-002-03-8L

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