
16 Mbit LPC Flash
SST49LF160C
Advance Information
Security ID Registers
The SST49LF160C device offers a 256-bit Security ID reg-
ister space. The Security ID space is divided into two seg-
ments - one (64-bits) factory programmed segment and
one (192 bits) user programmed segment. The first seg-
ment is programmed and locked at SST with a unique 64-
bit number. The user segment (192 bits) is left blank (FFH)
for the customer to be programmed as desired. Refer to
Table 8, “Software Command Sequence” for more details.
TABLE 15: Security ID Registers
Register
The Security ID Information and its Write Lock/Unlock sta-
tus can be Read in the Register Access Space for Execute-
In-Place type of applications. (See Table 15.)
The Write Lock-out status of the Security ID space can be
read from the SEC_ID_WRITE_LOCK register (see Table
15). The SEC_ID_WRITE_LOCK register is a read-only
register that is accessible at the address location specified
in Table 15.
Register
SEC_ID__WRITE_LOCK
Address 1
FFBC0102H
Value
0000 0000b
Access
R
Description
Write Unlocked
0000 0001b
Write Locked
SEC_ID_BYTE_0
SEC_ID_BYTE_1
SEC_ID_BYTE_2
SEC_ID_BYTE_3
…
SEC_ID_BYTE_7
SEC_ID_BYTE_8
SEC_ID_BYTE_9
…
SEC_ID_BYTE_30
SEC_ID_BYTE_31
FFBC0180H
FFBC0181H
FFBC0182H
FFBC0183H
…
FFBC0187H
FFBC0188H
FFBC0189H
…
FFBC019EH
FFBC019FH
R
R
R
R
…
R
R
R
…
R
R
Factory Programmed
Factory Programmed
Factory Programmed
Factory Programmed
…
Factory Programmed
User Programmed
User Programmed
…
User Programmed
User Programmed
T15.0 1315
1. Address shown in this column is for boot device only. Address locations should appear elsewhere in the 4 GByte system memory
map depending on ID strapping values on ID[3:0] pins when multiple LPC memory devices are used in a system.
?2006 Silicon Storage Technology, Inc.
22
S71315-00-000
4/06