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R01UH0336EJ0102 Rev.1.02
Page 138 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 3 CPU System Function
Table 3-10
SEG_FLAG Register
Bit Position
Bit Name
Function
7
SEG_
FLAG
DMAF
DMA error flag
This flag is set when DMA access leads to the following errors.
•
Uncorrectable error generated from flash ROM in response to attempted
access to data in the code-flash area
•
Uncorrectable error in response to access to data in the on-chip RAM area
•
Access to the reserved area (undefined area)
0: DMA error is not generated
1: DMA error is generated
5
SEG_
FLAG
SEGF
Reserved area error flag
This flag is set in response to attempted CPU access to data in the reserved
area (undefined area).
0: Error in the reserved area is not generated
1: Error in the reserved area is generated
Note The reserved area (undefined area) in the address range
FFFF 0000
H
to FFFF 4FFF
H
is for use in future expansion.
The user is unable to use this area. A system error will occur if
access is attempted.
4
SEG_
FLAG
RAMF
CPU on-chip RAM area error flag
This flag is set when CPU access to data in the on-chip RAM area leads to an
uncorrectable ECC error.
0: Error in the on-chip RAM area is not generated
1: Error in the on-chip RAM area is generated
2
SEG_
FLAG
EXTF
EXT area error flag
This flag is set when CPU access to data in data-flash memory or peripheral I/
O area leads to the following errors.
•
An error indicated by data-flash memory at the time the memory is read
(the error occurs due to the execution of 8- and 32-bit loading, i.e. ld.b and
ld.w, from the data-flash area).
•
Access to peripheral I/O causes an undefined area access error (UAA) or
access time out (ATO) to be generated. The error is specified in the
peripheral I/O bus PSELG control register (APC).
0: Error in the EXT area is not generated
1: Error in the EXT area is generated
1
SEG_
FLAG
FCHF
Code flash error flag
This flag is set when CPU access to data in the code-flash area leads to an
uncorrectable ECC error.
0: Flash ROM error is not generated.
1: Flash ROM error is generated.
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