C8051F970-A-GM Datasheet, PDF (133/454 Pages) Silicon Laboratories – Low Power Capacitive Sensing MCU with up to 32 kB of Flash

SFR Configuration:
CS0CN = 0x80 ^{Enables CS0}
CS0CF = 0x70
CS0SS = 0x02
CS0SE = 0x0D
Enables Auto-scan
as start-of-
conversion source
Sets P2.2 as Auto-
scan starting channel
Sets P3.5 as Auto-
scan ending channel
P2MDIN = 0xF2 ^{Configures P2.3,}
P2.2, P2.0 as analog
inputs
P3MDIN = 0x04 ^{Configures P3.0-P3.1}
and P3.3-P3.7 as
analog inputs
A P2.0 0
D P2.1 1
A P2.2 2
A P2.3 3
D P2.4 4
D P2.5 5
D P2.6 6
D P2.7 7
A P3.0 8
A P3.1 9
D P3.2 10
A P3.3 11
A P3.4 12
A P3.5 13
A P3.6 14
A P3.7 15
...
Figure 18.2. Auto-Scan Example
C8051F97x
Scans on channels
not configured as
analog inputs result
in indeterminate
values that cannot
trigger a CS0
Greater Than
Interrupt event
Rev 1.0
133