ST10F272B_12 STMICROELECTRONICS [STMicroelectronics], ST10F272B_12 Datasheet - Page 40

• Manufacturer Part Number: ST10F272B_12
• Description: 16-bit MCU with 256 Kbyte Flash memory and 12/20 Kbyte RAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Internal Flash memory
5.5.3
5.5.4
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Flash non volatile access protection register 0
FNVAPR0 (0x08 DFB8)
Table 20.
Flash non volatile access protection register 1 low
FNVAPR1L (0x08 DFBC)
Table 21.
PDS15 PDS14 PDS13 PDS12 PDS11 PDS10 PDS9 PDS8 PDS7 PDS6 PDS5 PDS4 PDS3 PDS2 PDS1 PDS0
ACCP
DBGP
PDS(15:0)
RW
15
15
Bit
Bit
RW
14
14
RW
Flash non volatile access protection register 0
Flash non volatile access protection register 1 low
13
13
Access Protection
This bit, if programmed at 0, disables any access (read/write) to data mapped
inside IFlash Module address space, unless the current instruction is fetched from
IFlash.
Debug Protection
This bit, if erased at 1, allows to by-pass all the protections using the Debug
features through the Test Interface. If programmed at 0, on the contrary, all the
debug features, the Test Interface and all the Flash Test Modes are disabled. Even
STMicroelectronics will not be able to access the device to run any eventual failure
analysis.
Protections Disable 15-0
If bit PDSx is programmed at 0 and bit PENx is erased at 1, the action of bit ACCP
is disabled. Bit PDS0 can be programmed at 0 only if both bits DBGP and ACCP
have already been programmed at 0. Bit PDSx can be programmed at 0 only if bit
PENx-1 has already been programmed at 0.
RW
12
12
RW
11
11
RW
Doc ID 11917 Rev 3
10
10
RW
reserved
9
9
NVR
NVR
RW
8
8
RW
7
7
Function
Function
RW
6
6
RW
5
5
RW
4
4
ST10F272B/ST10F272E
RW
3
3
Delivery value:: FFFFh
Reset value: ACFFh
RW
2
2
DBGP ACCP
RW
RW
1
1
RW
RW
0
0