MC9S12DT128MPVE Freescale Semiconductor, MC9S12DT128MPVE Datasheet - Page 72
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MC9S12DT128MPVE
Manufacturer Part Number
MC9S12DT128MPVE
Description
IC MCU 256K FLASH 25MHZ 112-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.MC9S12DG128CFUER.pdf
(128 pages)
Specifications of MC9S12DT128MPVE
Core Processor
HCS12
Core Size
16-Bit
Speed
25MHz
Connectivity
CAN, I²C, SCI, SPI
Peripherals
PWM, WDT
Number Of I /o
91
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 5.25 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
112-LQFP
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12DT128MPVE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
MC9S12DT128B Device User Guide — V01.09
4.3 Security
The device will make available a security feature preventing the unauthorized read and write of the
memory contents. This feature allows:
The user must be reminded that part of the security must lie with the user’s code. An extreme example
would be user’s code that dumps the contents of the internal program. This code would defeat the purpose
of security. At the same time the user may also wish to put a back door in the user’s program. An example
of this is the user downloads a key through the SCI which allows access to a programming routine that
updates parameters stored in EEPROM.
4.3.1 Securing the Microcontroller
Once the user has programmed the FLASH and EEPROM (if desired), the part can be secured by
programming the security bits located in the FLASH module. These non-volatile bits will keep the part
secured through resetting the part and through powering down the part.
The security byte resides in a portion of the Flash array.
Check the Flash Block User Guide for more details on the security configuration.
4.3.2 Operation of the Secured Microcontroller
4.3.2.1 Normal Single Chip Mode
This will be the most common usage of the secured part. Everything will appear the same as if the part was
not secured with the exception of BDM operation. The BDM operation will be blocked.
4.3.2.2 Executing from External Memory
The user may wish to execute from external space with a secured microcontroller. This is accomplished
by resetting directly into expanded mode. The internal FLASH and EEPROM will be disabled. BDM
operations will be blocked.
•
•
•
•
Protection of the contents of FLASH,
Protection of the contents of EEPROM,
Operation in single-chip mode, No BDM possible
Operation from external memory with internal FLASH and EEPROM disabled.
VREGEN
Freescale Semiconductor, Inc.
Table 4-3 Voltage Regulator VREGEN
1
0
For More Information On This Product,
Internal Voltage Regulator enabled
Internal Voltage Regulator disabled, VDD1,2 and
VDDPLL must be supplied externally with 2.5V
Go to: www.freescale.com
Description