K60P100M100SF2RM Datasheet, PDF (751/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 30 EzPort
The Read FlexRAM (RDFLEXRAM) command returns data from the FlexRAM. If the
FlexRAM is configured for EEPROM operation, the RDFLEXRAM command can
effectively be used to read data from EEPROM-flash memory.
Data continues being returned for as long as the EzPort chip select (EZP_CS) is asserted,
with the address automatically incrementing. In this way, the entire contents of FlexRAM
can be returned by one command.
The initial address must be 32-bit aligned (the two LSBs must be zero). Attempts to read
from an address which does not fall within the valid address range (see Flash Memory
Map for EzPort Access) for the FlexRAM returns junk data.
For this command to return the correct data, the EzPort clock (EZP_CK) must run at the
internal system clock divided by eight or slower. This command is not accepted if the
WEF, WIP, or FS bit in the EzPort status register are set.
30.3.1.14 Read FlexRAM at High Speed
This command is only applicable for devices with FlexRAM.
The Read FlexRAM at High Speed (FAST_RDFLEXRAM) is identical to the
RDFLEXRAM command, except for the inclusion of a dummy byte following the
address bytes and before the first data byte is returned.
This command can be run with an EzPort clock (EZP_CK) frequency up to and including
half the internal system clock frequency of the micro-controller. This command is not
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
0x0000_0000
Size
See device's Chip
Configuration details
Flash block
Flash
Valid Commands
READ, FAST_READ, SP, SE, BE
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
751