Datasheet

SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
10
Notes: 1. Refer to peripheral multiplexing tables in Section 7.4 “Peripheral Signals Multiplexing on I/O Lines” for these signals.
2. When configured as an input, the NRST pin enables asynchronous reset of the device when asserted low. This allows
connection of a simple push button on the NRST pin as a system-user reset.
3. Programming of this pull-up resistor is performed independently for each I/O line through the PIO Controllers. After reset, all
the I/O lines default as inputs with pull-up resistors enabled, except those which are multiplexed with the External Bus
Interface signals that require to be enabled as Peripheral at reset. This is explicitly indicated in the column “Reset State” of
the peripheral multiplexing tables.
Touchscreen Analog-to-Digital Converter Controller - TSADCC
AD0X
P
Analog input channel 0 or Touchscreen
Top channel
Analog VDDANA Multiplexed with AD0
AD1X
M
Analog input channel 1 or Touchscreen
Bottom channel
Analog VDDANA Multiplexed with AD1
AD2Y
P
Analog input channel 2 or Touchscreen
Right channel
Analog VDDANA Multiplexed with AD2
AD3Y
M
Analog input channel 3 or Touchscreen
Left channel
Analog VDDANA Multiplexed with AD3
GPAD4–GPAD7 Analog Inputs Analog VDDANA
TSADTRG ADC Trigger Input VDDANA
TSADVREF ADC Reference Analog VDDANA
Table 2-1. Signal Description List (Continued)
Signal Name Function Type
Active
Level
Reference
Voltage Comments