st10f273m STMicroelectronics, st10f273m Datasheet - Page 42

• Manufacturer Part Number: st10f273m
• Description: 16-bit Mcu With 512 Kbyte Flash Memory And 36 Kbyte Ram
• Manufacturer: STMicroelectronics

Internal Flash memory
5.5.6
5.5.7
42/182
Flash non-volatile access protection register 0 (FNVAPR0)
FNVAPR0 (0x0E DFB8)
Table 22.
Flash non-volatile access protection register 1 low (FNVAPR1L)
FNVAPR1L (0x0E DFBC)
Table 23.
PDS1
15:0
RW
Bit
15:2
15
15
Bit
5
1
0
PDS1
RW
14
14
PDS15
4
Name
PDS0
...
DBGP
Name
ACCP
PDS1
RW
FNVAPR0 register bits
-
FNVAPR1L register bits
13
13
3
Protections disable15-0
PDS1
RW
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.
12
12
2
Reserved. These bits must be left to their default value.
Debug protection
Access protection
This bit, if erased at 1, allows to bypass 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.
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.
PDS1
RW
11
11
1
PDS1
RW
10
10
0
PDS
RW
9
Reserved
9
9
-
PDS
RW
8
8
8
NVR
NVR
PDS
RW
7
7
7
Function
Description
PDS
RW
6
6
6
PDS
RW
5
5
5
PDS
RW
4
4
4
PDS
RW
3
3
3
Delivery value: ACFFh
Delivery value: FFFFh
PDS
RW
2
2
2
ST10F273M
DBGP ACCP
PDS
RW
RW
1
1
1
PDS
RW
RW
0
0
0