MD2211-D16-V3 SanDisk, MD2211-D16-V3 Datasheet - Page 8

• Manufacturer Part Number: MD2211-D16-V3
• Manufacturer: SanDisk
• Type: Flash Diskr

Specifications of MD2211-D16-V3

• Density: 16MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Package Type: TSOP-I
• Mounting: Surface Mount
• Pin Count: 48
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Supplier Unconfirmed

4
4.1
Upon the negation of the RSTIN# input, the DiskOnChip downloads the boot code into the 1024 byte XIP
boot block from the flash memory. As a failsafe mechanism, the DiskOnChip uses its internal EDC/ECC
(Error Detection and Correction) logic to verify the integrity of this data. If an error is detected, then the
DiskOnChip downloads the redundant copy of the boot code that is stored in subsequent pages of the flash
memory. The entire download process takes less than 1ms. The DiskOnChip will not respond to accesses
until the download process has completed.
At the completion of the download process, the host system can execute the boot code from the XIP boot
block. This code can load the TrueFFS software or any other code from the NAND flash into the host’s
memory. This area is normally used to hold an x86 BIOS extension. Most non-x86 platforms do not use this
area.
4.2
The DiskOnChip is connected as a standard memory device, similar to SRAM. Typically, the DiskOnChip
may be mapped to any free 8KB memory space. In PC-compatible platform it is usually mapped into the
BIOS expansion area. If the allocated memory window is larger than 8KB, an automatic anti-aliasing
mechanism prevents the firmware from being loaded more than once during the ROM expansion search.
Figure 2 illustrates a typical system interface of the DiskOnChip 2000.
91-SR-002-32-8L Rev. 0.2
Designing with the DiskOnChip 2000 TSOP 16MB
Theory of Operation
Hardware
Figure 1: DiskOnChip 2000 TSOP 16MB Simplified Block Diagram
RSTIN#
A[0:12]
ID[0:1]
D[0:7]
CE#
WE#
OE#
GND
VCC
Interface
System
PRELIMINARY
1024-Byte
XIP Boot
Block
EDC/ECC
Flash
Control
DiskOnChip 2000 TSOP 16MB Data Sheet
Flash
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