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R01UH0336EJ0102 Rev.1.02
Page 294 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 8 Reset Controller
8.3.2
Details of Reset Controller Registers
(1)
RESF - Reset Source Register
This register contains information about which type of resets occurred since
the last SYSRES (RESET/DBRES).
Each following reset condition sets the corresponding flag in the register.
For example, if a clock monitor CLMA0RES occurs after a watchdog timer
reset WDTA0RES, this register reads 000C
H
.
Access
This register can be read in 16-bit units.
Address
FF42 0020
H
Initial value
8000
H
This register is initialized by SYSRES (RESET/DBRES).
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESF
15
0
0
0
0
0
0
0
RESF
7
RESF
6
RESF
5
RESF
4
RESF
3
RESF
2
RESF
1
RESF
0
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Table 8-3
RESF Register Contents
Bit Position
Bit Name
Function
15
RESF15
External reset flag
0: The RESET/DBRES reset is not being generated
1: The RESET/DBRES reset is being generated
7
RESF7
Self-diagnostic BIST reset flag
0: The BISTRES reset is not being generated
1: The BISTRES reset is being generated
This flag will always be set after the execution of self-diagnostic BIST. The state
of the flag is retained as long as self-diagnostic BIST is not executed again.
6
RESF6
Safety guardian reset flag
0: The SGARES reset is not being generated
1: The SGARES reset is being generated
5
RESF5
Clock monitor CLMA2 reset flag
0: The CLMA2RES reset is not being generated
1: The CLMA2RES reset is being generated
4
RESF4
Clock monitor CLMA1 reset flag
0: The CLMA1RES reset is not being generated
1: The CLMA1RES reset is being generated
3
RESF3
Clock monitor CLMA0 reset flag
0: The CLMA0RES reset is not being generated
1: The CLMA0RES reset is being generated
2
RESF2
Watchdog timer WDTA0 reset flag
0: The WDTA0RES reset is not being generated
1: The WDTA0RES reset is being generated
1
RESF1
Software reset flag
0: The SWRES reset is not being generated
1: The SWRES reset is being generated
0
RESF0
Low voltage indicator reset flag
0: The LVIRES reset is not being generated
1: The LVIRES reset is being generated
Содержание V850 Series
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