SAM9G15_14 Datasheet, PDF (222/1215 Pages) ATMEL Corporation – ARM-based Embedded MPU

Only PADs PA[20:15], PA[13:11] and PA[4:2] can be configured.
When programming 0x0 in fields, no delay is added (reset value) and the propagation delay of the pad buffers is the
inherent delay of the pad buffer. When programming 0xF in fields, the propagation delay of the corresponding pad is
maximal.
Figure 23-9. Programmable I/O Delays
PIO
PAin[0]
PAout[0]
DELAY1
PAin[1]
PAout[1]
DELAY2
Programmable Delay Line
Programmable Delay Line
PAin[2]
PAout[2]
DELAYx
Programmable Delay Line
23.5.13 Programmable I/O Drive
It is possible to configure the I/O drive for pads PA[20:15], PA[13:11] and PA[4:2]. For any details, refer to the product
electrical characteristics.
23.5.14 Programmable Schmitt Trigger
It is possible to configure each input for the Schmitt Trigger. By default the Schmitt trigger is active. Disabling the Schmitt
Trigger is requested when using the QTouch^™ Library.
SAM9G15 [DATASHEET]
11152F–ATARM–10-Mar-2014
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