MD3331-D64 ETC-unknow, MD3331-D64 Datasheet - Page 35

• Manufacturer Part Number: MD3331-D64
• Description: Diskonchip Millennium Plus
• Manufacturer: ETC-unknow

6.3
TrueFFS utilizes an 8KB memory window in the CPU address space consisting of four 2KB sections, as depicted in
Figure 16. When in Reset mode, the Programmable Boot Block in sections 0 and 3 will show the IPL (1KB) of the
first 32MB of the dual-die, aliased twice. Read cycles from sections 1 and 2 always return the value 00H to create a
fixed and known checksum.
After setting the MAX_ID field in the Configuration register (done by IPL0), the second copy of IPL 0 is replaced
with the IPL of the second 32MB device of the dual-die, thereby creating a 2KB programmable boot block.
When in Normal mode, sections 1 and 2 are used for the internal registers. The Programmable Boot Block in section
0 contains IPL0 and IPL1. Section 3 contains IPL0 aliased twice.
Note: The addresses described here are relative to the absolute starting address of the 8KB memory window.
35
8KB Memory Window in DiskOnChip Millennium Plus 64MB
Figure 16: DiskOnChip Millennium Plus 64MB Memory Map
1000H
1800H
000H
800H
Programmable
Programmable
[000H-3FFH]
Reset Mode
(2 aliases)
boot block
(2 aliases)
boot block
00H
00H
[IPL]
Data Sheet, Rev. 1.7
Section 0
Section 1
Section 2
Section 3
Programmable
Programmable
Normal Mode
Flash area
(+ aliases)
(+ aliases)
[IPL0, IPL1]
[IPL0, IPL1]
Registers
boot block
(2 aliases)
boot block
window
Control
DiskOnChip Millennium Plus 16/32/64MByte
93-SR-002-03-8L