mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 511

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

23.4.4
23.4.4.1 Wait Mode
When the MCU enters wait mode, the FTFL module is not affected. The FTFL module
can recover the MCU from wait via the command complete interrupt (see Interrupts).
23.4.4.2 Stop Mode
When the MCU requests stop mode, if an FTFL command is active (CCIF = 0) the
command execution completes before the MCU is allowed to enter stop mode.
23.4.5 Functional Modes of Operation
The FTFL module has two operating modes: NVM Normal and NVM Special. The
operating mode affects the command set availability (see
Configuration details of this device for how to activate each mode.
23.4.6 Flash Reads and Ignored Writes
The FTFL module requires only the flash address to execute a flash memory read. MCU
read access is available to all flash blocks.
The MCU must not read from the flash memory while commands are running (as
evidenced by CCIF=0) on that block. Read data cannot be guaranteed from a flash block
while any command is processing within that block. The block arbitration logic detects
any simultaneous access and reports this as a read collision error (see the
FSTAT[RDCOLERR] bit).
Freescale Semiconductor, Inc.
Flash Operation in Low-Power Modes
The MCU should never enter stop mode while any FTFL
command is running (CCIF = 0).
While the MCU is in very-low-power modes (VLPR, VLPW,
VLPS), the FTFL module does not accept flash commands.
MCF51JF128 Reference Manual, Rev. 2, 03/2011
CAUTION
Preliminary
NOTE
Table
Chapter 23 Flash Memory Module (FTFL)
23-31). Refer to the Chip
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