MD3331-D32-V3Q18 M-Systems Inc., MD3331-D32-V3Q18 Datasheet - Page 29

• Manufacturer Part Number: MD3331-D32-V3Q18
• Description: Mobile Diskonchip Plus 128Mbits 1.8V I/o
• Manufacturer: M-Systems Inc.

6.2
TrueFFS utilizes an 8KB memory window in the CPU address space consisting of four 2KB sections, as depicted in
Figure 11. When in Reset mode, the Programmable Boot Block in sections 0 and 3 will show the IPL (1KB), aliased
twice, to support systems that search for a checksum at the boot stage from the top and bottom of memory. Read
cycles from sections 1 and 2 always return the value 00H to create a fixed and known checksum. When in Normal
mode, sections 1 and 2 are used for the internal registers.
The addresses described here are relative to the absolute starting address of the 8KB memory window.
29
8KB Memory Window in Mobile DiskOnChip Plus 16MB
Figure 11: Mobile DiskOnChip Plus 16MB Memory Map
1000H
1800H
000H
800H
Programmable
Programmable
[000H-3FFH]
Reset Mode
[000H-3FFH]
Boot Block
(2 aliases)
Boot Block
(2 aliases)
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
Mobile DiskOnChip Plus 16/32MByte 1.8V I/O
95-SR-000-10-8L