C8051F99X_10 Datasheet, PDF (33/322 Pages) Silicon Laboratories – Ultra Low Power, 8-2 kB Flash, Capacitive Sensing MCU

C8051F99x-C8051F98x
Name
P0.1/
Table 3.1. Pin Definitions for the C8051F99x-C8051F98x (Continued)
Pin Numbers
‘F980/1/2
‘F983/5
‘F990/1
-GM
‘F986/7 ‘F986/7
‘F988/9 ‘F988/9
‘F996/7 ‘F996/7
-GM -GU
Type
Description
1
23
2 D I/O or Port 0.1. See Port I/O Section for a complete description.
A In
AGND*
G Optional Analog Ground. See Section “5.9. Voltage and
Ground Reference Options” on page 86.
P0.2/
20
22
1 D I/O or Port 0.2. See Port I/O Section for a complete description.
A In
External Clock Input. This pin is the external oscillator
XTAL1/
A In return for a crystal or resonator. See Section
“19. Clocking Sources” on page 186.
RTCOUT
P0.3/
19
D Out Buffered SmaRTClock oscillator output.
21 24 D I/O or Port 0.3. See Section “21. Port Input/Output” on
A In page 213 for a complete description.
XTAL2/
A Out
D In
A In
External Clock Output. This pin is the excitation driver for
an external crystal or resonator.
External Clock Input. This pin is the external clock input
in external CMOS clock mode.
External Clock Input. This pin is the external clock input
in capacitor or RC oscillator configurations.
See Section “19. Clocking Sources” on page 186 for
complete details.
WAKEOUT
P0.4/
18
D Out _{Wake-up request signal to wake up external devices.}
20 23 D I/O or Port 0.4. See Section “21. Port Input/Output” on
A In page 213 for a complete description.
TX
P0.5/
D Out UART TX Pin. See Section “21. Port Input/Output” on
page 213.
17
19 22 D I/O or Port 0.5. See Section “21. Port Input/Output” on
A In page 213 for a complete description.
RX
D In UART RX Pin. See Section “21. Port Input/Output” on
page 213.
*Note: Available only on the C8051F980/2/6/8 and C8051F990/6 devices.
Rev. 1.0
33