ST10F271E STMICROELECTRONICS [STMicroelectronics], ST10F271E Datasheet - Page 28

• Manufacturer Part Number: ST10F271E
• Description: 16-bit MCU with 128 Kbyte Flash memory and 8/12 Kbyte RAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Internal Flash memory
5.2.3
Note:
28/180
1. IFlash sectors B0F6 and B0F7 are not physically disabled. The corresponding area must be reserved by
The table above refers to the configuration when bit ROMS1 of SYSCON register is set.
When Bootstrap mode is entered:
●
●
●
●
In Bootstrap mode, by default ROMS1 = 0, so the first 32KBytes of IFlash are mapped in
segment 0.
Example:
In default configuration, to program address 0, user must put the value 01'0000h in the
FARL and FARH registers, but to verify the content of the address 0 a read to 00'0000h must
be performed.
Next
this set of registers can be addressed by the CPU.
Table 6.
Low power mode
The Flash module is automatically switched off executing PWRDN instruction. The
consumption is drastically reduced, but exiting this state can require a long time (t
Recovery time from Power Down mode for the Flash modules is anyway shorter than the
main oscillator start-up time. To avoid any problem in restarting to fetch code from the Flash,
it is important to size properly the external circuit on RPD pin.
PWRDN instruction must not be executed while a Flash program/erase operation is in
progress.
FCR1-0
FDR1-0
FAR
FER
FNVWPIR
FNVAPR0
FNVAPR1
XFVTAUR0
the application mapping. Accesses to this area will send back the content of the Flash cell ( by default
FFFFh: the erased state, if not modified by user).
Name
Test-Flash is seen and available for code fetches (address 00’0000h)
User I-Flash is only available for read and write accesses
Write accesses must be made with addresses starting in segment 1 from 01'0000h,
whatever ROMS1 bit in SYSCON value
Read accesses are made in segment 0 or in segment 1 depending of ROMS1 value.
Table 6: Control register interface
Control register interface
Flash Control Registers 1-0
Flash Data Registers 1-0
Flash Address Registers
Flash Error Register
Flash Non Volatile Protection I
Register
Flash Non Volatile Access Protection
Register 0
Flash Non Volatile Access Protection
Register 1
XBus Flash Volatile Temporary
Access Unprotection Register 0
Description
shows the Control Register interface composition:
0x0008 0000 - 0x0008 0007
0x0008 0008 - 0x0008 000F
0x0008 0010 - 0x0008 0013
0x0008 0014 - 0x0008 0015
0x0008 DFB0 - 0x0008
DFB1
0x0008 DFB8 - 0x0008
DFB9
0x0008 DFBC - 0x0008
DFBF
0x0000 EB50 - 0x0000 EB51 2 byte
Addresses
ST10F271B/ST10F271E
8 byte
8 byte
4 byte
2 byte
2 byte
2 byte
4 byte
Size
PD
).
16-bit
Bus
size