m36dr432ad STMicroelectronics, m36dr432ad Datasheet - Page 19

• Manufacturer Part Number: m36dr432ad
• Description: 32 Mbit 2mb X16, Dual Bank, Page Flash Memory And 4 Mbit 256kb X16 Sram, Multiple Memory Product
• Manufacturer: STMicroelectronics

Table 8. Read Protection Register
Note: X= Don’t care.
Table 9. Program, Erase Times and Program, Erase Endurance Cycles
Note: 1. Excludes the time needed to execute the sequence for program command.
Flash Block Locking
The Flash memory features an instant, individual
block locking scheme that allows any block to be
locked or unlocked with no latency. This locking
scheme has two levels of protection.
Lock
Unique ID 0
Unique ID 1
Unique ID 2
Unique ID 3
OTP 0
OTP 1
OTP 2
OTP 3
Parameter Block (4 KWord) Erase (Preprogrammed)
Main Block (32 KWord) Erase (Preprogrammed)
Bank Erase (Preprogrammed, Bank A)
Bank Erase (Preprogrammed, Bank B)
Chip Program
Chip Program (Double Word, V
Word Program
Double Word Program (V
Quadruple Word Program (V
Program/Erase Cycles (per Block)
Lock/Unlock - this first level allows software-
only control of block locking.
Lock-Down - this second level requires
hardware interaction before locking can be
changed.
Word
2. Same timing value if V
(1)
EF
V
V
V
V
V
V
V
V
V
(2)
IL
IL
IL
IL
IL
IL
IL
IL
IL
GF
V
V
V
V
V
V
V
V
V
Parameter
IL
IL
IL
IL
IL
IL
IL
IL
IL
PPF
WF
V
V
V
V
V
V
V
V
V
PPF
IH
IH
IH
IH
IH
IH
IH
IH
IH
PPF
= 12V)
= 12V
PPF
= 12V)
= 12V)
A20-A8
X
X
X
X
X
X
X
X
X
(1)
A7-0
80h
81h
82h
83h
84h
85h
86h
87h
88h
100,000
OTP data
OTP data
OTP data
OTP data
Min
DQ15-8
ID data
ID data
ID data
ID data
XXh
The protection status of each block can be set to
Locked, Unlocked, and Lock-Down. Table 10, de-
fines all of the possible protection states (WPF,
DQ1, DQ0).
Reading a Block’s Lock Status
The lock status of every block can be read in the
Auto Select mode of the device. Subsequent
reads at the address specified in Table 6, will out-
put the protection status of that block. The lock
status is represented by DQ0 and DQ1. DQ0 indi-
cates the Block Lock/Unlock status and is set by
the Lock command and cleared by the Unlock
command. It is also automatically set when enter-
M36DR432AD, M36DR432BD
Max
100
100
100
OTP data
OTP data
OTP data
OTP data
2.5
4
00000b
ID data
ID data
ID data
ID data
DQ7-3
M36DR432AD, M36DR432BD
Typ
0.3
0.8
20
20
10
OTP data
OTP data
OTP data
OTP data
3
8
8
8
prot.data
Security
ID data
ID data
ID data
ID data
DQ2
100k W/E Cycles
Typical after
OTP data
OTP data
OTP data
OTP data
prot.data
ID data
ID data
ID data
ID data
DQ1
OTP
30
25
1
3
6
OTP data
OTP data
OTP data
OTP data
ID data
ID data
ID data
ID data
DQ0
cycles
0
Unit
µs
µs
µs
19/52
s
s
s
s
s
s