AT25DF021-SSH ATMEL [ATMEL Corporation], AT25DF021-SSH Datasheet - Page 10

• Manufacturer Part Number: AT25DF021-SSH
• Description: One mechanical button switch Three LEDs Four expansion headers
• Manufacturer: ATMEL [ATMEL Corporation]

6.5 Board controller
10
NOTE
NOTE
AVR32924
Table 6-1. UC3 touch connections.
As the device has a very low pin count, a tradeoff has been made to be able to have
as many I/O lines as possible routed to the headers. The sensor lines to the Atmel
QTouch button and the Atmel QMatrix slider are shared with some of the headers.
The sensitivity of the sensor lines is very high on these exposed pins, and so touching
the I/O pins will give erroneous result in the touch sensing mechanism.
Adding top modules to the board with functionality connected to these pins is not
recommended. Top modules without functionality on these pins will only add some
capacitive load and will not affect the QMatrix sensor significantly.
The board controller and the Atmel AT32UC3L064 are connected together through
TWI and UART. Both interfaces can be used to communicate between the devices,
but only the UART is implemented by default in the board controller.
Table 6-2. AT32UC3L064 and board controller communication interface.
Touch sensor
onboard
reference
QSlider X0
QSlider X1
QSlider X2
QSlider X3
QSlider YK0
-
QButton SNSK0
-
Interface
UART RX
UART TX
TWI SCL
TWI SDA
Note:
1. These represent the RX and TX on the device. The RX on one device is
(1)
(1)
connected to TX on the other device, and visa versa.
QTouch
method
pin name
SNSK15
SNS15
Atmel AT32UC3L064 pin
PA07
PA06
PB05
PA21
QMatrix
method
pin name
X7
X10
X11
X13
YK3
Y3
CAT
module
pin name
CSB6
CSA10
CSB10
CSB12
CSB7
CSA7
CSB15
CSA15
Atmel AT32UC3B1256 pin
PA24
PA23
PA09
PA10
UC3 pin
PA15
PA19
PA22
PB08
PA05
PA04
PB09
PB12
Selection bit in
PINMODEx
register
SP6
SP10
SP10
SP12
SP7
SP7
SP15
SP15
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