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R01UH0336EJ0102 Rev.1.02
Page 1062 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 20 CAN Controller (FCN)
Note
FCNnGMCLCTL.FCNnGMCLSSMO is cleared to 0 when the FCN module
enters FCN sleep mode/FCN stop mode, or when
FCNnGMCLCTL.FCNnGMCLPWOM is cleared to 0.
FCNnGMCLSSMO is set to 1 when FCN sleep mode/FCN stop mode is
released, or when FCNnGMCLCTL.FCNnGMCLPWOM is set to 1.
Note 1.
FCNnGMCLCTL.FCNnGMCLECCF is set to 1 in case of detecting a memory
error when reading from the message buffer RAM during the software reset
process. Once FCNnGMCLECCF is set to 1, it keeps the level until it is cleared
to 0.
Note 2.
Use this bit only to check a memory error after software reset.
Note 3.
It is impossible to clear FCNnGMCLECCF to 0 while
FCNnGMCLCTL.FCNnGMCLSORF is set to 1 (software reset is ongoing).
Note 1.
While a software reset is ongoing (FCNnGMCLCTL.FCNnGMCLSORF is set
to 1), it is impossible to set FCNnGMCLCTL.FCNnGMCLPWOM and
FCNnGMCLCTL.FCNnGMCLESDE.
It is possible to set start a software reset by setting
FCNnGMCLCTL.FCNnGMCLSESR to 1 while
FCNnGMCLCTL.FCNnGMCLPWOM is cleared to 0.
Note 2.
When FCNnGMCLCTL.FCNnGMCLSORF is set to 1, the initialization of
message buffer RAM starts. It is possible to detect error during initializing
message buffer RAM, if FCNnGMCLCTL.FCNnGMCLECCF is cleared before
setting FCNnGMCLSORF.
Note 3.
When FCNnGMCLCTL.FCNnGMCLSORF is set to 1 again while it has been
set to 1, the software reset procedure does not restart, but continues.
Note 4.
After release of the hardware reset, FCNnGMCLCTL.FCNnGMCLSORF is
automatically set to 1 and initialization of message buffer RAM starts.
Note 5.
It is impossible that clearing FCNnGMCLCTL.FCNnGMCLPWOM to 0 and
setting FCNnGMCLCTL.FCNnGMCLSORF to 1 are done at the same time.
Note 6.
If a hardware reset occurs while FCNnGMCLCTL.FCNnGMCLSORF = 1, the
software reset procedure is stopped (aborted), and the hardware reset starts.
Caution
To request a forced shut down, FCNnGMCLCTL.FCNnGMCLPWOM must be
cleared to 0 in a sub-sequent, immediately following access after
FCNnGMCLCTL.FCNnGMCLESDE has been set to 1. If any access to
another register (including reading the FCNnGMCLCTL register) is executed
without clearing FCNnGMCLPWOM immediately after FCNnGMCLESDE has
been set to 1, FCNnGMCLESDE is forcibly cleared to 0, and the forced shut
down request is invalid.
FCNnGMCLECCF
Message Buffer RAM Read Error Detect
0
Not detect error for reading from message buffer RAM.
1
Detect error for reading from message buffer RAM.
FCNnGMCLSORF
Software Reset Execution Status
0
No software reset
1
Software reset is ongoing
FCNnGMCLESDE
Enabling Forced Shut Down
0
Forced shut down disabled.
1
Forced shut down of FCNnGMCLCTL.FCNnGMCLPWOM
bit = 0 enabled.