S9S12GN48F0VLF Freescale Semiconductor, S9S12GN48F0VLF Datasheet - Page 357
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S9S12GN48F0VLF
Manufacturer Part Number
S9S12GN48F0VLF
Description
16-bit Microcontrollers - MCU S12 Core,64kFlash,Au
Manufacturer
Freescale Semiconductor
Datasheet
1.S9S12G96F0CLL.pdf
(1292 pages)
Specifications of S9S12GN48F0VLF
Rohs
yes
Core
S12
Processor Series
MC9S12G
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
48 KB
Data Ram Size
2 KB
On-chip Adc
Yes
Operating Supply Voltage
3.13 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-48
Mounting Style
SMD/SMT
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
S9S12GN48F0VLF
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
- Current page: 357 of 1292
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9.1.7
The microcontroller can be unsecured in special modes by erasing the entire EEPROM and Flash memory
contents.
When a secure microcontroller is reset into special single chip mode (SS), the BDM firmware verifies
whether the EEPROM and Flash memory are erased. If any EEPROM or Flash memory address is not
erased, only BDM hardware commands are enabled. BDM hardware commands can then be used to write
to the EEPROM and Flash registers to mass erase the EEPROM and all Flash memory blocks.
When next reset into special single chip mode, the BDM firmware will again verify whether all EEPROM
and Flash memory are erased, and this being the case, will enable all BDM commands, allowing the Flash
options/security byte to be programmed to the unsecured value. The security bits SEC[1:0] in the Flash
security register will indicate the unsecure state following the next reset.
Freescale Semiconductor
•
•
The application software previously programmed into the microcontroller has been designed to
have the capability to erase and program the Flash options/security byte, or security is first disabled
using the backdoor key method, allowing BDM to be used to issue commands to erase and program
the Flash options/security byte.
The Flash sector containing the Flash options/security byte is not protected.
Complete Memory Erase (Special Modes)
MC9S12G Family Reference Manual, Rev.1.23
Security (S12XS9SECV2)
359
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