RC28F256K3C120 NUMONYX, RC28F256K3C120 Datasheet - Page 52

• Manufacturer Part Number: RC28F256K3C120
• Description: IC FLASH 256MBIT 120NS 64BGA
• Manufacturer: NUMONYX

Specifications of RC28F256K3C120

• Rohs Status: RoHS non-compliant
• Format - Memory: FLASH
• Memory Type: StrataFlash® FLASH
• Memory Size: 256M (16Mx16)
• Speed: 120ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-BGA
• Other names: 853157

28F640K3, 28F640K18, 28F128K3, 28F128K18, 28F256K3, 28F256K18
13.0
13.1
52
Figure 23. Block Locking State Diagram
Power-Up/Reset
Security Modes
This device offers both hardware and software security features. Block lock operations, the
Protection Registers, and VPEN enable the user to implement various levels of data protection. The
following section describes security features in detail.
Block Locking Operations
Individual instant block locking is used to protect user code and/or data within the flash memory
array. All blocks power up locked to protect array data from being altered during power transitions.
Any block can be locked or unlocked without latency. Locked blocks cannot be programmed or
erased; they can only be read.
Software-controlled security is implemented with the Block Lock and Block Unlock commands.
Hardware-controlled security can be implemented with the Block Lock-Down command and WP#.
Refer to
Lock Operations Flowchart” on page
Notes:
Figure 23
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 between
this block. D1 = ‘1’, Lock-down has been issued to this block.
Hardware Locked and Locked-Down states.
for a state diagram of the flash security features. Also see
Unlocked
Locked
[X00]
[X01]
Software Block Lock (0x60/0x01) or Software Block Unlock (0x60/0xD0)
Software Block Lock-Down (0x60/0x2F)
WP# hardware control
77.
Software
Locked-
Down
Locked
[111]
[011]
4,5
WP# Hardware Control
Hardware
Unlocked
Locked
[011]
[110]
Figure 32, “Block
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