Datasheet

Figure 23-6. I/O Configuration - Totem-Pole Output with Disabled Input
PULLEN
DIR
OUT
IN
INEN
PULLEN INEN DIR
0 0
1
Figure 23-7. I/O Configuration - Totem-Pole Output with Enabled Input
PULLEN
DIR
OUT
IN
INEN
PULLEN INEN DIR
0 1
1
Figure 23-8. I/O Configuration - Output with Pull
PULLEN
DIR
OUT
IN
INEN
PULLEN INEN DIR
1 0
0
23.6.3.4 Digital Functionality Disabled
Neither Input nor Output functionality are enabled.
Figure 23-9. I/O Configuration - Reset or Analog I/O: Digital Output, Input and Pull Disabled
PULLEN
DIR
OUT
IN
INEN
PULLEN INEN DIR
0 0
0
23.6.4 PORT Access Priority
The PORT is accessed by different systems:
• The ARM
®
CPU through the ARM
®
single-cycle I/O port (IOBUS)
• The ARM
®
CPU through the high-speed matrix and the AHB/APB bridge (APB)
SAM D21 Family
PORT - I/O Pin Controller
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 413