Datasheet

©2011 Silicon Storage Technology, Inc. DS25085A 10/11
15
8 Mbit Firmware Hub
SST49LF008A
Data Sheet
A
Microchip Technology Company
Block Locking Registers
SST49LF008A provides software controlled lock protection through a set of Block Locking registers.
The Block Locking Registers are read/write registers and it is accessible through standard addressable
memory locations specified in Table 6. Unused register locations will read as 00H.
Table 6: Block Locking Registers for SST49LF008A
1
1. Default value at power up is 01H
Register Block Size Protected Memory Address Range Memory Map Register Address
T_BLOCK_LK 64K 0FFFFFH - 0F0000H FFBF0002H
T_MINUS01_LK 64K 0EFFFFH - 0E0000H FFBE0002H
T_MINUS02_LK 64K 0DFFFFH - 0D0000H FFBD0002H
T_MINUS03_LK 64K 0CFFFFH - 0C0000H FFBC0002H
T_MINUS04_LK 64K 0BFFFFH - 0B0000H FFBB0002H
T_MINUS05_LK 64K 0AFFFFH - 0A0000H FFBA0002H
T_MINUS06_LK 64K 09FFFFH - 090000H FFB90002H
T_MINUS07_LK 64K 08FFFFH - 080000H FFB80002H
T_MINUS08_LK 64K 07FFFFH - 070000H FFB70002H
T_MINUS09_LK 64K 06FFFFH - 060000H FFB60002H
T_MINUS10_LK 64K 05FFFFH - 050000H FFB50002H
T_MINUS11_LK 64K 04FFFFH - 040000H FFB40002H
T_MINUS12_LK 64K 03FFFFH - 030000H FFB30002H
T_MINUS13_LK 64K 02FFFFH - 020000H FFB20002H
T_MINUS14_LK 64K 01FFFFH -010000H FFB10002H
T_MINUS15_LK 64K 00FFFFH - 000000H FFB00002H
T6.4 25085
Table 7: Block Locking Register Bits
Reserved Bit [7..2] Lock-Down Bit [1] Write-Lock Bit [0] Lock Status
000000 0 0 Full Access
000000 0 1 Write Locked (Default State at Power-Up)
000000 1 0 Locked Open (Full Access Locked Down)
000000 1 1 Write Locked Down
T7.3 25085