F272-BAG-T-TR STMicroelectronics, F272-BAG-T-TR Datasheet - Page 38

• Manufacturer Part Number: F272-BAG-T-TR
• Description: MCU 16BIT 256K FLASH 144-TQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of F272-BAG-T-TR

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: ASC, CAN, EBI/EMI, I²C, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 20K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-TQFP, 144-VQFP
• Processor Series: ST10F27x
• Core: ST10
• Data Bus Width: 16 bit
• Data Ram Size: 12 KB
• Interface Type: ASC, CAN, I2C, SSC
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 111
• Number Of Timers: 4
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 24 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No

Internal Flash memory
5.5
5.5.1
5.5.2
38/182
Protection strategy
The protection bits are stored in Non Volatile Flash cells inside IFLASH module, that are
read once at reset and stored in 4 Volatile registers. Before they are read from the Non
Volatile cells, all the available protections are forced active during reset.
The protections can be programmed using the Set Protection operation (see Flash Control
Registers paragraph), that can be executed from all the internal or external memories
except from the Flash itself.
Two kind of protections are available: write protections to avoid unwanted writings and
access protections to avoid piracy. In next paragraphs all different level of protections are
shown, and architecture limitations are highlighted as well.
Protection registers
The 4 Non Volatile Protection Registers are one time programmable for the user.
One register (FNVWPIR) is used to store the Write Protection fuses respectively for each
sector IFLASH module. The other three Registers (FNVAPR0 and FNVAPR1L/H) are used
to store the Access Protection fuses.
Flash non volatile write protection I register
FNVWPIR (0x08 DFB0)
Table 19.
W0P(9:0)
15
Bit
14
13
Flash non volatile write protection I register
Write Protection Bank 0 / Sectors 9-0 (IFLASH)
These bits, if programmed at 0, disable any write access to the sectors of Bank 0
(IFLASH)
12
reserved
11
10
9
NVR
8
W0P7W0P6W0P5W0P4W0P3W0P2W0P1W0P0
RW
7
Function
RW
6
RW
5
RW
4
ST10F272B/ST10F272E
RW
3
Reset value: FFFFh
RW
2
RW
1
RW
0