C8051F980-C-GM Datasheet, PDF (169/325 Pages) Silicon Laboratories – Ultra Low Power, 8-2 kB Flash, Capacitive Sensing MCU

C8051F99x-C8051F98x
SFR Definition 15.2. PMU0FL: Power Management Unit Flag^1,2
Bit
7
6
Name
Type
R
R
Reset ⁰
0
5
4
3
2
1
0
CS0WK
R
R
R
R
R
R/W
0
0
0
0
0
Varies
SFR Page = 0x0; SFR Address = 0xCE
Bit Name
Description
Write
Read
7:1 Unused Unused
Don’t Care.
0000000b
0
CS0WK CS0 Wake-up Source
0: Disable wake-up on
Set to 1 if CS0 event
Enable and Flag
CS0 event.
caused the last wake-up.
1: Enable wake-up on CS0
event.
Notes:
1. The Low Power Internal Oscillator cannot be disabled and the MCU cannot be placed in Suspend or Sleep
Mode if any wake-up flags are set to 1. Software should clear all wake-up sources after each reset and after
each wake-up from Suspend or Sleep Modes.
2. PMU0 requires two system clocks to update the wake-up source flags after waking from Suspend mode. The
wake-up source flags will read ‘0’ during the first two system clocks following the wake from Suspend mode.
Rev. 1.2
169