C8051T630 Datasheet, PDF (100/221 Pages) Silicon Laboratories – Mixed-Signal Byte-Programmable EPROM MCU

C8051T630/1/2/3/4/5
SFR Definition 18.2. RSTSRC: Reset Source
Bit
7
6
5
4
3
2
1
0
Name
MEMERR C0RSEF SWRSF WDTRSF MCDRSF PORSF PINRSF
Type
R
R
R/W
R/W
R
R/W
R/W
R
Reset
0
Varies
Varies
Varies
Varies
Varies
Varies
Varies
SFR Address = 0xEF
Bit Name
Description
Write
Read
7 Unused _Unused.
Don’t care.
0
6 MEMERR _{EPROM Error Reset Flag.} N/A
Set to 1 if EPROM
read/write error caused
the last reset.
5 C0RSEF _{Comparator0 Reset Enable} Writing a 1 enables
and Flag.
Comparator0 as a reset
source (active-low).
Set to 1 if Comparator0
caused the last reset.
4 SWRSF _{Software Reset Force and} Writing a 1 forces a sys- Set to 1 if last reset was
Flag.
tem reset.
caused by a write to
SWRSF.
3 WDTRSF _{Watchdog Timer Reset Flag.} N/A
Set to 1 if Watchdog Timer
overflow caused the last
reset.
2 MCDRSF _{Missing Clock Detector}
Enable and Flag.
Writing a 1 enables the Set to 1 if Missing Clock
Missing Clock Detector. Detector timeout caused
The MCD triggers a reset the last reset.
if a missing clock condition
is detected.
1 PORSF _{Power-On/VDD Monitor}
Writing a 1 enables the
Reset Flag, and V_DD monitor
Reset Enable.
V_DD monitor as a reset
source.
Writing 1 to this bit
Set to 1 anytime a power-
on or V_DD monitor reset
occurs.
When set to 1 all other
before the V_DD monitor RSTSRC flags are inde-
is enabled and stabilized terminate.
may cause a system
reset.
0 PINRSF _{HW Pin Reset Flag.}
N/A
Set to 1 if RST pin caused
the last reset.
Note: Do not use read-modify-write operations on this register
100
Rev. 1.0