M16C65 Datasheet, PDF (96/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
6.2.2 Reset Source Determine Register (RSTFR)
6. Resets
Reset Source Determine Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
RSTFR
Address
0018h
After Reset
See Table 6.4
Bit Symbol
Bit Name
Function
RW
CWR
Cold start-up/warm start-up
discrimination flag
0 : Cold start
1 : Warm start
RW
HWR
Hardware reset detection flag
0 : Not detected
1 : Detected
RO
SWR
Software reset detection flag
0 : Not detected
1 : Detected
RO
WDR
Watchdog timer reset detection 0 : Not detected
flag
1 : Detected
RO
LVD1R
Voltage monitor 1 reset
detection flag
0 : Not detected
1 : Detected
RO
LVD2R
Voltage monitor 2 reset
detection flag
0 : Not detected
1 : Detected
RO
OSDR
Oscillation stop detection reset 0 : Not detected
detection flag
1 : Detected
RW
—
(b7)
Reserved bit
If necessary, set to 0. Read as undefined
value.
RW
Table 6.4 Bit Values in the RSTFR Register after Reset
Reset
OSDR
Bits in the RSTFR Register
LVD2R LVD1R WDR SWR
Hardware reset
No change 0
0
0
0
Power-on reset
0
0
0
0
0
Voltage monitor 0 reset
0
0
0
0
0
Voltage monitor 1 reset
0
0
1
0
0
Voltage monitor 2 reset
0
1
0
0
0
Oscillation stop
detection reset
1
0
0
0
0
Watchdog timer reset
0
0
0
1
0
Software reset
0
0
0
0
1
HWR
1
0
0
0
0
0
0
0
CWR
No change
0
0
No change
No change
No change
No change
No change
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 61 of 791