Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
724
Figure 34-9.
Programmable I/O Delays
34.5.13 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
Schmitt trigger is requested when using the QTouch
™
Library.
34.5.14 Parallel Capture Mode
34.5.14.1 Overview
The PIO Controller integrates an interface able to read data from a CMOS digital image sensor, a high-speed
parallel ADC, a DSP synchronous port in synchronous mode, etc. For better understanding and to ease reading,
the following description uses an example with a CMOS digital image sensor.
parallel ADC, a DSP synchronous port in synchronous mode, etc. For better understanding and to ease reading,
the following description uses an example with a CMOS digital image sensor.
34.5.14.2 Functional Description
The CMOS digital image sensor provides a sensor clock, an 8-bit data synchronous with the sensor clock and two
data enables which are also synchronous with the sensor clock.
data enables which are also synchronous with the sensor clock.
Figure 34-10. PIO Controller Connection with CMOS Digital Image Sensor
As soon as the parallel capture mode is enabled by writing a one to the PCEN bit in PIO_PCMR, the I/O lines
connected to the sensor clock (PIODCCLK), the sensor data (PIODC[7:0]) and the sensor data enable signals
(PIODCEN1 and PIODCEN2) are configured automatically as inputs. To know which I/O lines are associated with
connected to the sensor clock (PIODCCLK), the sensor data (PIODC[7:0]) and the sensor data enable signals
(PIODCEN1 and PIODCEN2) are configured automatically as inputs. To know which I/O lines are associated with
Programmable Delay Line
PIO
PAout[0]
PAin[0]
Programmable Delay Line
Programmable Delay Line
PAout[1]
PAin[1]
PAout[2]
PAin[2]
DELAY2
DELAY1
DELAYx
PIO Controller
Parallel Capture
Mode
CMOS Digital
Image Sensor
PDC
Data
Status
PIODCCLK
PIODC[7:0]
PIODCEN1
PIODCEN2
PCLK
DATA[7:0]
VSYNC
HSYNC