SST89E554 SST [Silicon Storage Technology, Inc], SST89E554 Datasheet - Page 41

• Manufacturer Part Number: SST89E554
• Description: FlashFlex51 MCU
• Manufacturer: SST [Silicon Storage Technology, Inc]

FlashFlex51 MCU
SST89E564 / SST89V564 / SST89E554 / SST89V554
Preliminary Specifications
TABLE
©2001 Silicon Storage Technology, Inc.
Level
1. P = Programmed (Cell logic state = 0), U = Unprogrammed (Cell logic state = 1).
2. SFST[7:5] = Security Lock Decoding Bits (SECD)
1
2
3
4
8-1: S
SFST[7:5]
000
100
011
101
010
110
001
111
ECURITY
Security Lock Bits
SB1
L
U
U
U
U
P
P
P
P
OCK
O
PTIONS
SB2
U
U
P
U
P
P
U
P
1,2
1
SB3
U
U
U
U
P
P
P
P
1
Unlock
SoftLock
Hard Lock
SoftLock
Hard Lock
Hard Lock
Block 1
Security Status of:
41
Unlock
SoftLock
Hard Lock
SoftLock
SoftLock
Hard Lock
Block 0
Security Type
No Security Features are Enabled.
MOVC instructions executed from
external program memory are dis-
abled from fetching code bytes from
internal memory, EA# is sampled and
latched on Reset, and further pro-
gramming of the flash is disabled.
Level 2 plus Verify disabled, both
blocks locked.
Level 2 plus Verify disabled. Code in
Block 1 may program Block 0 and vice
versa.
Level 2 plus Verify disabled. Code in
Block 1 may program Block 0.
Same as Level 3 Hardlock/Hardlock,
but MCU will start code execution
from the internal memory regardless
of EA#.
S71181-03-000 9/01
T8-1.7 384
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