Information

NOTE
The flash is configured in NVM special mode, restricting which
commands can be executed by the flash when security is
enabled.
After receiving 12 bytes of data, EzPort writes the data to the FCCOB 0-B registers in the
flash and then automatically launches the command within the flash. If greater or less
than 12 bytes of data is received, this command has unexpected results and may result in
the WEF flag being set.
This command is not accepted if the WEF or WIP bit is set or if the WEN bit is not set in
the EzPort status register.
30.3.1.11 Read FCCOB Registers at High Speed
The Read FCCOB Registers at High Speed (FAST_RDFCCOB) command allows the
user to read the contents of the flash common command object registers. After receiving
the command, EzPort waits for one dummy byte of data before returning FCCOB register
data starting at FCCOB 0 and ending with FCCOB B.
This command can be run with an EzPort clock (EZP_CK) frequency half the internal
system clock frequency of the micro-controller or slower. Attempts to read greater than
12 bytes of data returns junk data. This command is not be accepted if the WEF, WIP, or
FS bit in the EzPort status register is set.
30.4 Flash Memory Map for EzPort Access
The following table shows the flash memory map for access through EzPort.
NOTE
The flash block address map for access through EzPort may not
conform to the system memory map. Changes are made to
allow the EzPort address width to remain at 24-bits.
Table 30-5. Flash Memory Map for EzPort Access
Valid Start Address Size Flash block Valid Commands
0x0000_0000
See device's Chip
Configuration details
Flash READ, FAST_READ, SP, SE, BE
Chapter 30 EzPort
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc. 707