995
6437E–ATARM–23-Apr-13
SAM9M11
42.4
Signal Description
42.5
Product Dependencies
42.5.1
Power Management
The TSADC controller is not continuously clocked. The programmer must first enable the
TSADC controller Clock in the Power Management Controller (PMC) before using the TSADC
controller. However, if the application does not require TSADC controller operations, the TSADC
controller clock can be stopped when not needed and be restarted later.
Configuring the TSADC controller does not require the TSADC controller clock to be enabled.
42.5.2
Interrupt Sources
The TSADCC interrupt line is connected on one of the internal sources of the Advanced Inter-
rupt Controller. Using the TSADCC interrupt requires the AIC to be programmed first.
42.5.3
Analog Inputs
The analog input pins can be multiplexed with PIO lines. In this case, the assignment of the
TSADCC input is automatically done as soon as the corresponding channel is enabled by writing
the register TSADCC_CHER. By default, after reset, the PIO lines are configured as input with
its pull-up enabled and the TSADCC inputs are connected to the GND.
42.5.4
I/O Lines
The pin TSADTRG may be shared with other peripheral functions through the PIO Controller. In
this case, the PIO Controller should be set accordingly to assign the pin TSADTRG to the
TSADCC function.
Table 42-1.
TSADCC Pin Description
Pin Name
Description
VDDANA
Analog power supply
TSADVREF
Reference voltage
AD0X
P
Analog input channel 0 or Touch Screen Top channel
AD1X
M
Analog input channel 1 or Touch Screen Bottom channel
AD2Y
P
Analog input channel 2 or Touch Screen Right channel
AD3Y
M
Analog input channel 3 or Touch Screen Left channel
GPAD4 - GPAD7
General-purpose analog input channels 4 to 7
TSADTRG
External trigger
Table 42-2.
Peripheral IDs
Instance
ID
TSADCC
20
Table 42-3.
I/O Lines
Instance
Signal
I/O Line
Peripheral
TSADCC
TSADTRG
PD28
A