M58MR032C Datasheet, PDF (15/52 Pages) STMicroelectronics – 32 Mbit 2Mb x16, Mux I/O, Dual Bank, Burst 1.8V Supply Flash Memory

Figure 5. Security Block Memory Map
M58MR032C, M58MR032D
Parameter Block # 0
88h
User Programmable OTP
85h
84h
Unique device number
81h
80h
Protection Register Lock
210
AI90023
Table 13. Protection States ⁽¹⁾
Current State ⁽²⁾ Program/Erase
(WP, DQ1, DQ0)
Allowed
Protect
Next State After Event ⁽³⁾
Unprotect
Lock
WP transition
100
Yes
101
100
111
000
101
No
101
100
111
001
110
Yes
111
110
111
011
111
No
111
110
111
011
000
Yes
001
000
011
100
001
No
001
000
011
101
011
No
011
011
011
111 or 110 ⁽⁴⁾
Note: 1. All blocks are protected at power-up, so the default configuration is 001 or 101 according to WP status.
2. Current state and Next state gives the protection status of a block. The protection status is defined by the write protect in and by
DQ1 (= 1 for a locked block) and DQ0 (= 1 for a protected block) as read in the Read Electronic Signature instruction with A1 = VIH
and A0 = V_IL.
3. Next state is the protection status of a block after a Protect or Unprotect or Lock command has been issued or after WP has changed
its logic value.
4. A WP transition to V_IH on a locked block will restore the previous DQ0 value, giving a 111 or 110.
15/52