Flash Memory
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 603
20 PEAS: Program/Erase Access Space (Read Only)
PEAS is used to indicate which space is valid for Program and Erase operations: main array space or
shadow/test space.
PEAS=0 indicates that the main address space is active for all flash module program and erase
operations.
PEAS=1 indicates that the test or shadow address space is active for program and erase.
The value in PEAS is captured and held with the first interlock write done for Modify operations. The value
of PEAS is retained between sampling events (such as subsequent first interlock writes).
0: Shadow/Test address space is disabled for program/erase and main address space enabled.
1: Shadow/Test address space is enabled for program/erase and main address space disabled.
21 DONE: modify operation DONE (Read Only)
DONE indicates if the flash module is performing a high voltage operation.
DONE is set to 1 on termination of the flash module reset.
DONE is cleared to 0 just after a 0 to 1 transition of EHV, which initiates a high voltage operation, or after
resuming a suspended operation.
DONE is set to 1 at the end of program and erase high voltage sequences.
DONE is set to 1 (within t
PABT
or t
EABT
, equal to P/E Abort Latency) after a 1 to 0 transition of EHV,
which aborts a high voltage Program/Erase operation.
DONE is set to 1 (within t
ESUS
, time equals to Erase Suspend Latency) after a 0 to 1 transition of ESUS,
which suspends an erase operation.
0 Flash is executing a high voltage operation.
1 Flash is not executing a high voltage operation.
22 PEG: Program/Erase Good (Read Only)
The PEG bit indicates the completion status of the last flash program or erase sequence for which high
voltage operations were initiated. The value of PEG is updated automatically during the Program and
Erase high voltage operations.
Aborting a Program/Erase high voltage operation will cause PEG to be cleared to 0, indicating the
sequence failed.
PEG is set to 1 when the flash module is reset, unless a flash memory initialization error has been
detected.
The value of PEG is valid only when PGM=1 and/or ERS=1 and after DONE transitions from 0 to 1 due to
an abort or the completion of a Program/Erase operation. PEG is valid until PGM/ERS makes a 1 to 0
transition or EHV makes a 0 to 1 transition.
The value in PEG is not valid after a 0 to 1 transition of DONE caused by ESUS being set to logic 1.
If Program or Erase are attempted on blocks that are locked, the response will be PEG=1, indicating that
the operation was successful, and the content of the block were properly protected from the Program or
Erase operation.
If a Program operation tries to program at 1 bits that are at 0, the program operation is correctly executed
on the new bits to be programmed at 0, but PEG is cleared, indicating that the requested operation has
failed.
In Array Integrity Check or Margin mode, PEG is set to 1 when the operation is completed, regardless
the occurrence of any error. The presence of errors can be detected only comparing checksum value
stored in UMIRS0–1.
Aborting an Array Integrity Check or a Margin mode operation will cause PEG to be cleared to 0,
indicating the sequence failed.
0 Program or Erase operation failed.
1 Program or Erase operation successful.
23:26 Reserved (Read Only)
Write these bits has no effect and read these bits always outputs 0.
Table 17-42. MCR field descriptions (continued)
Field Description
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