Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
pmod:pmodaqs:reference-manual [2021/05/14 23:03] – ↷ Page moved from reference:pmod:pmodaqs:reference-manual to pmod:pmodaqs:reference-manual Arthur Brownpmod:pmodaqs:reference-manual [2024/04/02 19:44] (current) – Martha
Line 1: Line 1:
 ====== Pmod AQS Reference Manual ====== ====== Pmod AQS Reference Manual ======
 +
 +<WRAP center round important 60%>
 +The Pmod AQS is retired and no longer for sale in our store. 
 +</WRAP>
 +
 The Digilent Pmod AQS (Revision A) is a digital gas sensor for monitoring indoor air quality at low power. With the {{https://ams.com/ccs811| AMS CCS811}}, you can detect a The Digilent Pmod AQS (Revision A) is a digital gas sensor for monitoring indoor air quality at low power. With the {{https://ams.com/ccs811| AMS CCS811}}, you can detect a
 wide range of Volatile Organic Compounds (VOCs) using the micro-hotplate technology enables a highly reliable solution for gas sensors with very fast cycle times. wide range of Volatile Organic Compounds (VOCs) using the micro-hotplate technology enables a highly reliable solution for gas sensors with very fast cycle times.
Line 38: Line 43:
 ---- ----
 ===== Interfacing with the Pmod===== ===== Interfacing with the Pmod=====
-The Pmod AQS communicates with the host board via the [[pmod:communication_protocols:I2C|I²C protocol]]. By first sending the 7-bit I²C address of 1011011 (0x5B) and then a read/write bit (high/low logic level, respectively), followed by the register address of interest at a maximum clock frequency of 400 kHz, users can both configure and read from the Pmod AQS. [[:reference:pmod:pmodaqs:#J2 Pinout|Header J2]] on the Pmod AQS passes through all of the signals present on the main [[:reference:pmod:pmodaqs:#J1 Pinout|Header J1]] to allow for the daisy chaining of multiple I²C compatible modules. +The Pmod AQS communicates with the host board via the [[pmod:communication_protocols:I2C|I²C protocol]]. By first sending the 7-bit I²C address of 1011011 (0x5B) and then a read/write bit (high/low logic level, respectively), followed by the register address of interest at a maximum clock frequency of 400 kHz, users can both configure and read from the Pmod AQS. [[pmod:pmodaqs:#J2 Pinout|Header J2]] on the Pmod AQS passes through all of the signals present on the main [[pmod:pmodaqs:#J1 Pinout|Header J1]] to allow for the daisy chaining of multiple I²C compatible modules. 
  
 ==== Application Register Map ==== ==== Application Register Map ====
Line 95: Line 100:
 The schematics of the %%Pmod AQS%% are available {{:reference:pmod:pmodaqs:pmodaqs_sch.pdf |here}}. Additional information about the VOCs Gas sensor including communication modes and specific timings of the chip can be found in the datasheet [[https://ams.com/ccs811|here]]. The schematics of the %%Pmod AQS%% are available {{:reference:pmod:pmodaqs:pmodaqs_sch.pdf |here}}. Additional information about the VOCs Gas sensor including communication modes and specific timings of the chip can be found in the datasheet [[https://ams.com/ccs811|here]].
  
-Example code and more specific information on how to use the Pmod AQS can be found on its [[reference:pmod:pmodaqs:start#additional_resources|Resource Center]].  +Example code and more specific information on how to use the Pmod AQS can be found on its [[pmod:pmodaqs:start#additional_resources|Resource Center]].  
  
-If you have any questions or comments about the %%Pmod AQS%%, feel free to post them under the appropriate section ("Add-on Boards") of the [[https://forum.digilentinc.com/|Digilent Forum]].+If you have any questions or comments about the %%Pmod AQS%%, feel free to post them under the appropriate section ("Add-on Boards") of the [[https://forum.digilent.com/|Digilent Forum]].
  
 {{tag>pmod pmodaqs humidity reference-manual doc }} {{tag>pmod pmodaqs humidity reference-manual doc }}