M36DR432AD Datasheet, PDF (19/52 Pages) STMicroelectronics – 32 Mbit 2Mb x16, Dual Bank, Page Flash Memory and 4 Mbit 256Kb x16 SRAM, Multiple Memory Product

M36DR432AD, M36DR432BD
Table 8. Read Protection Register
Word
EF GF WF A20-A8
Lock
V_IL V_IL V_IH
X
Unique ID 0 VIL VIL VIH
X
Unique ID 1 VIL VIL VIH
X
Unique ID 2 VIL VIL VIH
X
Unique ID 3 VIL VIL VIH
X
OTP 0
V_IL V_IL V_IH
X
OTP 1
V_IL V_IL V_IH
X
OTP 2
V_IL V_IL V_IH
X
OTP 3
V_IL V_IL V_IH
X
Note: X= Don’t care.
A7-0
80h
81h
82h
83h
84h
85h
86h
87h
88h
DQ15-8 DQ7-3
DQ2
XXh
00000b
Security
prot.data
ID data ID data ID data
ID data ID data ID data
ID data ID data ID data
ID data ID data ID data
OTP data OTP data OTP data
OTP data OTP data OTP data
OTP data OTP data OTP data
OTP data OTP data OTP data
DQ1
OTP
prot.data
ID data
ID data
ID data
ID data
OTP data
OTP data
OTP data
OTP data
DQ0
0
ID data
ID data
ID data
ID data
OTP data
OTP data
OTP data
OTP data
Table 9. Program, Erase Times and Program, Erase Endurance Cycles
Parameter
M36DR432AD, M36DR432BD
Min
Max
Typ
Typical after
Unit
100k W/E Cycles
Parameter Block (4 KWord) Erase (Preprogrammed)
2.5
0.3
1
s
Main Block (32 KWord) Erase (Preprogrammed)
4
0.8
3
s
Bank Erase (Preprogrammed, Bank A)
3
6
s
Bank Erase (Preprogrammed, Bank B)
20
30
s
Chip Program ⁽¹⁾
20
25
s
Chip Program (Double Word, V_PPF = 12V) ⁽¹⁾
8
s
Word Program ⁽²⁾
100
10
µs
Double Word Program (V_PPF = 12V)
Quadruple Word Program (V_PPF = 12V)
Program/Erase Cycles (per Block)
100
8
100
8
100,000
µs
µs
cycles
Note: 1. Excludes the time needed to execute the sequence for program command.
2. Same timing value if V_PPF = 12V
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.
s Lock/Unlock - this first level allows software-
only control of block locking.
s Lock-Down - this second level requires
hardware interaction before locking can be
changed.
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-
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