ST10F273Z4 STMicroelectronics, ST10F273Z4 Datasheet - Page 36

• Manufacturer Part Number: ST10F273Z4
• Description: 16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
• Manufacturer: STMicroelectronics

Specifications of ST10F273Z4

• Single Voltage Supply: 5 V ±10%

Internal Flash memory
Table 19.
5.5
5.5.1
36/188
RESER
WPF
Bit
Flash error register
Protection strategy
The protection bits are stored in Non Volatile Flash cells, that are read once at reset and
stored in 5 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.
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 5 Non Volatile Protection Registers are one time programmable for the user.
Two register (FNVWPIRL/FNVWPIRH) are used to store the Write Protection fuses for each
sector IFlash module. The other three Registers (FNVAPR0 and FNVAPR1L/H) are used to
store the Access Protection fuses.
Resume error
This bit is automatically set when a suspended Program or Erase operation is not resumed
correctly due to a protocol error. In this case the suspended operation is aborted. This bit has to be
software reset.
Write protection flag
This bit is automatically set when trying to program or erase in a sector write protected. In case of
multiple Sector Erase, the not protected sectors are erased, while the protected sectors are not
erased and bit WPF is set. This bit has to be software reset.
Function
ST10F273Z4