MD3331-D32-V3Q18 M-Systems Inc., MD3331-D32-V3Q18 Datasheet - Page 47

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

9.6.3 Memory Map in a Cascaded Configuration
When cascading Mobile DiskOnChip Plus devices, the Programmable Boot Block size is enlarged by 1KB for each
additional 16MB device in the configuration. When four 16MB devices (or two 32MB devices) are connected in a
cascaded configuration, a boot block size of 4KB is available.
The MAX_ID field of the Configuration register can be programmed with the maximum ID value used to enable
access to the boot block of each device in a separate address space.
Initially at power-up, only device 0 responds to reads from the boot block address space with its 1KB of data aliased
at addresses 0K, 1K, 6K and 7K. Figure 18 shows the memory map when the maximum number of devices are
connected in a cascaded configuration, and the location of each IPL.
47
Figure 18: Memory Map in a Cascaded Configuration
0000H
0800H
1000H
1800H
Reset Mode
IPL 0
IPL 0
IPL 0
IPL 0
00H
00H
Data Sheet, Rev. 1.7
Programmable
Programmable
Section 0
Section 1
Section 2
Section 3
Block
Block
Boot
Boot
Normal Mode
(after setting
Flash Area
Registers
MAX_ID)
Window
Control
IPL 0
IPL 1
IPL 2
IPL 3
Mobile DiskOnChip Plus 16/32MByte 1.8V I/O
95-SR-000-10-8L