Table 5-2 ADC0 Signal DescriptionsSIGNAL NAME [1] | PIN TYPE [2] | DESCRIPTION [3] | ALV PIN [4] |
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ADC0_REFN (4) | A | ADC0 Negative Reference | J16 |
ADC0_REFP (4) | A | ADC0 Positive Reference | J15 |
ADC0_AIN0 (1) (2) (3) | A | ADC Analog Input 0 / GPIO1_80 (Input Only) | G20 |
ADC0_AIN1 (1) (2) (3) | A | ADC Analog Input 1 / GPIO1_81 (Input Only) | F20 |
ADC0_AIN2 (1) (2) (3) | A | ADC Analog Input 2 / GPIO1_82 (Input Only) | E21 |
ADC0_AIN3 (1) (2) (3) | A | ADC Analog Input 3 / GPIO1_83 (Input Only) | D20 |
ADC0_AIN4 (1) (2) (3) | A | ADC Analog Input 4 / GPIO1_84 (Input Only) | G21 |
ADC0_AIN5 (1) (2) (3) | A | ADC Analog Input 5 / GPIO1_85 (Input Only) | F21 |
ADC0_AIN6 (1) (2) (3) | A | ADC Analog Input 6 / GPIO1_86 (Input Only) | F19 |
ADC0_AIN7 (1) (2) (3) | A | ADC Analog Input 7 / GPIO1_87 (Input Only) | E20 |
ADC_EXT_TRIGGER0 | I | ADC Trigger Input | B16, C13 |
ADC_EXT_TRIGGER1 | I | ADC Trigger Input | D14, D16 |
(1) The General Purpose Input signal associated with this ADC0_AIN input has a debounce function when ADC0 is configured to operate in GPI mode. For more information on configuring ADC0 to operate in GPI mode, see the TRM Analog-to-Digital Converter (ADC) section in the Peripherals chapter. For more information on I/O Debounce configuration, see the TRM Device Configuration chapter.
(2) The ADC0_AIN[7:0] inputs only have hysterisis when ADC0 is configured to operate in GPI mode.
(3) Any unused ADC0_AIN inputs must be pulled to VSS through a resistor or connected directly to VSS when VDDA_ADC is connected to a power source.
(4) The ADC0_REFP and ADC0_REFN reference inputs are analog inputs which must be treated like high transient power supply rails, where ADC0_REFN is expected to be connected directly to the PCB ground plane along with all other VSS pins, and ADC0_REFP is connected to a power source capable of providing at least 4mA of current. ADC0_REFP may be connected to the same power source as VDDA_ADC0 if the voltage tolerance of the supply provides an acceptable accuracy for the ADC reference. A high frequency decoupling capacitor must be connected directly between ADC0_REFP and ADC0_REFN. The high frequency decoupling capacitor should be placed in the ball array on the back side of the PCB and connected directly to the ADC0_REFP and ADC0_REFN pins with vias. ADC0_REFP may be connected to VSS if ADC0 is not used and VDDA_ADC0 has been connected to VSS. The high frequency decoupling capacitor described above will not be required if ADC0 is not used and ADC0_REFP is connected to VSS. See the Pin Connectivity Requirements section for more information on ADC0 connectivity.