SAM4L Datasheet, PDF (567/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
23.8
Module Configuration
The specific configuration for each GPIO instance is listed in the following tables. The module
bus clocks listed here are connected to the system bus clocks. Refer to Section 10. ”Power Man-
ager (PM)” on page 102 for details.
Table 23-3. GPIO Configuration
Feature
48 pin
package
Number of GPIO ports
1
Number of peripheral functions 8
64-pin
package
2
8
100-pin
package
3
8
Table 23-4. Implemented Pin Functions
Pin Function
Implemented
Pull-up
On all pins
Pull-down
On all pins
Slew Rate
On all pins
Drive Strength
On all pins
Schmitt Trigger Enable
On all pins
Notes
Controlled by PUER or peripheral
Controlled by PDER or peripheral
Controlled by OSRR or peripheral
Controlled by ODCR or peripheral
Controlled by STER or peripheral
Table 23-5. GPIO Clocks
Clock Name
CLK_GPIO
Description
Clock for the GPIO bus interface
The reset values for all GPIO registers are zero, with the following exceptions:
Table 23-6.
Port
0
0
0
0
0
0
0
0
1
1
1
Register Reset Values
Register
Reset Value
GPER
0xFFFFFFFF
PMR0
0x00000008
PMR1
0x00000000
PMR2
0x00000000
PUER
0x00000000
GFER
0x00000000
PARAMETER 0xFFFFFFFC
VERSION
0x00000215
GPER
0x0000FFFF
PMR0
0x00000000
PMR1
0x00000000
42023C–SAM–02/2013
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