TE28F800C3BD70 Intel, TE28F800C3BD70 Datasheet - Page 27

• Manufacturer Part Number: TE28F800C3BD70
• Description: IC FLASH 8MBIT 70NS 48TSOP
• Manufacturer: Intel

Specifications of TE28F800C3BD70

• Format - Memory: FLASH
• Memory Type: Advanced + Boot Block FLASH
• Memory Size: 8M (512K x 16)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 868489

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5.0
5.1
Datasheet
Figure 5. Block Locking State Diagram
Security Modes
Flexible Block Locking
The C3 device offers an instant, individual block-locking scheme that allows any block to be
locked or unlocked with no latency, enabling instant code and data protection.
This locking scheme offers two levels of protection. The first level allows software-only control of
block locking (useful for data blocks that change frequently), while the second level requires
hardware interaction before locking can be changed (useful for code blocks that change
infrequently).
The following sections will discuss the operation of the locking system. The term “state [abc]” will
be used to specify locking states; e.g., “state [001],” where a = value of WP#, b = bit D1 of the
Block Lock status register, and c = bit D0 of the Block Lock status register.
Locking State Diagram” on page 27
Power-Up/Reset
Notes:
1. [a,b,c] represents [WP#, D1, D0]. X = Don’t Care.
2. D1 indicates block Lock-down status. D1 = ‘0’, Lock-down has not been issued to
3. D0 indicates block lock status. D0 = ‘0’, block is unlocked. D0 = ‘1’, block is locked.
4. Locked-down = Hardware + Software locked.
5. [011] states should be tracked by system software to determine difference
this block. D1 = ‘1’, Lock-down has been issued to this block.
between Hardware Locked and Locked-Down states.
Unlocked
Locked
[X00]
[X01]
displays all of the possible locking states.
Intel
Software Block Lock (0x60/0x01) or Software Block Unlock (0x60/0xD0)
Software Block Lock-Down (0x60/0x2F)
WP# hardware control
£
Advanced+ Boot Block Flash Memory (C3)
Software
Locked-
Down
Locked
[111]
[011]
4,5
WP# Hardware Control
Figure 5, “Block
Hardware
Unlocked
Locked
[011]
[110]
5
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