Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
863
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
42.3
Block Diagram
Figure 42-1. Analog-to-Digital Converter Block Diagram with Touchscreen mode
42.4
Signal Description
Trigger
Selection
ADC Interrupt
ADTRG
VDDANA
ADVREF
GND
Control
Logic
Successive
Approximation
Register
Analog-to-Digital
Converter
User
Interface
Interrupt
Controller
Controller
Peripheral Bridge
APB
DMA
System Bus
Touchscreen
Analog
Inputs
AD0/XP/UL
AD1/XM/UR
AD3/YM/Sense
AD-
AD-
AD-
ADC Controller
PMC
MCK
ADC cell
AD2/YP/LL
AD4/LR
PIO
Other
Analog
Inputs
0
1
2
3
4
CHx
Timer
Counter
Channels
Touch-
screen
screen
Switches
Table 42-1. ADC Pin Description
Pin Name
Description
VDDANA
Analog power supply
ADVREF
Reference voltage
AD0 - AD
11
Analog input channels
ADTRG
External trigger