MK30DN512ZVLK10 Freescale Semiconductor, MK30DN512ZVLK10 Datasheet - Page 635

• Manufacturer Part Number: MK30DN512ZVLK10
• Description: ARM Microcontrollers - MCU KINETIS 512K SLCD
• Manufacturer: Freescale Semiconductor

Specifications of MK30DN512ZVLK10

• Core: ARM Cortex M4
• Processor Series: K30
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 512 KB
• Data Ram Size: 128 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.71 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-80
• Mounting Style: SMD/SMT

28.4.11.2 Changing the Security State
The security state out of reset can be permanently changed by programming the security
byte of the flash configuration field. This assumes that you are starting from a mode
where the necessary program flash erase and program commands are available and that
the region of the program flash containing the flash configuration field is unprotected. If
the flash security byte is successfully programmed, its new value takes affect after the
next chip reset.
28.4.11.2.1 Unsecuring the Chip Using Backdoor Key Access
The chip can be unsecured by using the backdoor key access feature, which requires
knowledge of the contents of the 8-byte backdoor key value stored in the Flash
Configuration Field (see
bits are in the enabled state, the Verify Backdoor Access Key command (see
Backdoor Access Key
keys for comparison to the stored keys. If the keys match, the FSEC[SEC] bits are
changed to unsecure the chip. The entire 8-byte key cannot be all 0s or all 1s; that is,
0000_0000_0000_0000h and FFFF_FFFF_FFFF_FFFFh are not accepted by the Verify
Backdoor Access Key command as valid comparison values. While the Verify Backdoor
Access Key command is active, program flash memory is not available for read access
and returns invalid data.
The user code stored in the program flash memory must have a method of receiving the
backdoor keys from an external stimulus. This external stimulus would typically be
through one of the on-chip serial ports.
If the KEYEN bits are in the enabled state, the chip can be unsecured by the following
backdoor key access sequence:
Freescale Semiconductor, Inc.
1. Follow the command sequence for the Verify Backdoor Access Key command as
2. If the Verify Backdoor Access Key command is successful, the chip is unsecured and
explained in
the FSEC[SEC] bits are forced to the unsecure state
Operating Mode
NVM Normal
NVM Special
Verify Backdoor Access Key Command
Command) can be run; it allows the user to present prospective
K30 Sub-Family Reference Manual, Rev. 6, Nov 2011
Flash Configuration Field
Table 28-63. FTFL Access Summary
Full command set
Unsecure
Chip Security State
Description). If the FSEC[KEYEN]
Full command set
Chapter 28 Flash Memory Module (FTFL)
Only the Erase All Blocks and Read 1s All
Blocks commands.
Secure
Verify
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