TMS320F28379D: ADC input

Howard Zou

Part Number: TMS320F28379D

Hi, this is the module diagram of ADC-A, it seems that only ADCINA0-5 are connected to a specific pin of the device. so how about ADC6,7,10,11?

Thanks.

over 8 years ago

0 Devin Cottier over 8 years ago

TI__Guru 60865 points

Hi Howard,

This device family has 4 ADC modules with 24 or 20 pins or 2 ADC modules with 14 pins. Because of this, you end up with each ADC having 4-6 dedicated pins depending on the part# and package. Note that ADCIN14 and 15 can be sampled by any ADC, so they provide some flexibility.

0 Howard Zou over 8 years ago in reply to Devin Cottier

TI__Genius 12365 points

Devin,
so how can i find the specific pin for ADCINA6 of such as F28379D? Neither datasheet nor technical reference manual can i find such information.

0 Devin Cottier over 8 years ago in reply to Howard Zou

TI__Guru 60865 points

Hi Howard,

This is documented in the diagram above. ADCINA6 is not connected to any internal signal or external pin.

0 Howard Zou over 8 years ago in reply to Devin Cottier

TI__Genius 12365 points

Devin,
So I don't understand if it's not connected to any internal signal or external pin, what it can be used for?
Thanks.

0 Devin Cottier over 8 years ago in reply to Howard Zou

TI__Guru 60865 points

Hi Howard,

Yes, these MUX settings can't be used and shouldn't be used.

This isn't any different than previous C2000 devices where not all 16 ADC inputs were pinned out.

The general architecture of up to 4 ADCs with 16 channels each would allow us to use the same architecture to build a device with up to 64 internal and/or external channels, but the largest device to date doesn't use nearly that many. This table in the datasheet specifies how many external pins are available:

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28379D: ADC input