MD3331-D64-V3 M-Systems Inc., MD3331-D64-V3 Datasheet - Page 23

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

3.3
The Configuration Interface block enables the designer to configure DiskOnChip Millennium Plus to operate in
different modes. When using a standard interface, the IF_CFG pin/ball is used to configure the device for 8/16 bit
access mode. The ID[1:0] pins/balls (only ID0 for a multiplexed interface) are used in cascaded configuration (refer
to Section 9.6), and the LOCK# pin/ball is used for hardware write/read protection.
3.4
The Protection and Security-Enabling block, consisting of read/write protection, Unique ID and OTP area, enables
advanced data and code security and protection. Located on the main route of traffic between the host and the flash,
this block monitors and controls all data and code transactions to and from DiskOnChip Millennium Plus.
3.4.1 Read/Write Protection
Data and code protection is implemented through a Protection State Machine (PSM). The user can configure one or
two independently programmable areas of the flash memory as read protected, write protected, or read/write
protected.
A protection area may be protected by either/both of these hardware mechanisms:
The size and location of each area is user-defined to provide maximum flexibility for the target platform and
application requirements.
The configuration parameters of the protected areas are stored on the flash media and are automatically downloaded
from the flash to the PSM upon power-up, to enable robust protection throughout the flash lifetime.
In the event of an attempt to bypass the protection mechanism, illegally modify the protection key or in any way
sabotage the configuration parameters, the entire DiskOnChip becomes both read and write protected, and is
completely inaccessible.
For further information on the hardware protection mechanism, refer to Section 4.
3.4.2 Unique Identification (UID) Number
Each DiskOnChip Millennium Plus is assigned a 16-byte UID number. Burned onto the flash during production, the
UID cannot be altered and is unique worldwide. The UID is essential in security-related applications, and can be
used to identify end-user products in order to fight fraudulent duplication by imitators.
The UID on DiskOnChip Millennium Plus eliminates the need for an additional on-board ID device, such as a
dedicated EEPROM.
3.4.3 One-Time Programmable (OTP) Area
The 6KB OTP area is user-programmable for complete customization. The user can write to this area once, after
which it is automatically locked permanently. After it is locked, the OTP area becomes read only, just like a ROM
device.
Typically, the OTP area is used to store customer and product information such as: product ID, software version,
production data, customer ID and tracking information.
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Configuration Interface
Protection and Security-Enabling Features
64-bit protection key
Hard-wired LOCK# signal
Data Sheet, Rev. 1.7
DiskOnChip Millennium Plus 16/32/64MByte
93-SR-002-03-8L