MC56F8366MFVE Freescale Semiconductor, MC56F8366MFVE Datasheet - Page 134

• Manufacturer Part Number: MC56F8366MFVE
• Description: IC DSP 16BIT 60MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8366MFVE

• Core Processor: 56800
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 62
• Program Memory Size: 544KB (272K x 16)
• Program Memory Type: FLASH
• Ram Size: 18K x 16
• Voltage - Supply (vcc/vdd): 2.25 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-LQFP
• For Use With: MC56F8367EVME - EVAL BOARD FOR MC56F83X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Part 7 Security Features
The 56F8366/56F8166 offer security features intended to prevent unauthorized users from reading the
contents of the Flash Memory (FM) array. The Flash security consists of several hardware interlocks that
block the means by which an unauthorized user could gain access to the Flash array.
However, 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, as this code would defeat the purpose of security. At the same
time, the user may also wish to put a “backdoor” in his program. As an example, the user downloads a
security key through the SCI, allowing access to a programming routine that updates parameters stored in
another section of the Flash.
7.1 Operation with Security Enabled
Once the user has programmed the Flash with his application code, the device can be secured by
programming the security bytes located in the FM configuration field, which occupies a portion of the FM
array. These non-volatile bytes will keep the part secured through reset and through power-down of the
device. Only two bytes within this field are used to enable or disable security. Refer to the Flash Memory
section in the 56F8300 Peripheral User Manual for the state of the security bytes and the resulting state
of security. When Flash security mode is enabled in accordance with the method described in the Flash
Memory module specification, the device will disable external P-space accesses restricting code execution
to internal memory, disable EXTBOOT = 1 mode, and disable the core EOnCE debug capabilities. Normal
program execution is otherwise unaffected.
7.2 Flash Access Blocking Mechanisms
The 56F8366/56F8166 have several operating functional and test modes. Effective Flash security must
address operating mode selection and anticipate modes in which the on-chip Flash can be compromised
and read without explicit user permission. Methods to block these are outlined in the next subsections.
7.2.1
At boot time, the SIM determines in which functional modes the device will operate. These are:
When Flash security is enabled as described in the Flash Memory module specification, the device will
boot in internal boot mode, disable all access to external P-space, and start executing code from the Boot
Flash at address 0x02_0000.
This security affords protection only to applications in which the device operates in internal Flash security
mode. Therefore, the security feature cannot be used unless all executing code resides on-chip.
When security is enabled, any attempt to override the default internal operating mode by asserting the
EXTBOOT pin in conjunction with reset will be ignored.
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Internal Boot Mode
External Boot Mode
Secure Mode
Forced Operating Mode Selection
56F8366 Technical Data, Rev. 7
Freescale Semiconductor
Preliminary