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  1. Need to use pins for both address writes and data reads from parallel memory on T4

    I have a low latency application that requires much more memory than than is available on Teensy 4.0. I want to use a parallel memory. I need to know the turn around time measured in CPU cycles for...
  2. Great post. Its clear I need help reading the...

    Great post. Its clear I need help reading the schematic. CORE_PINX_PORTREG obviously maps to the Teensy pins. Per the schematic, this group of pins maps to both AD_B0 and AD_B1. Both of these groups...
  3. Raft of Teensy 4 pin\port parallel read questions

    [I'm rediting to get the port table below to work...I'll take any hints on how to input tables here, this is the best I could do. Spaces and tabs are your enemy.]
    I have some I\O intensive work I...
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    Possible Teensy 4 schematic typo

    I'm cooking up another post and saw the Teensy 4.0 schematic say EMD_37 mapped to pin 30. Seems this should be EMC_37. Please confirm this isn't a separate port....
  5. A library probably wont work for me. The audio...

    A library probably wont work for me. The audio work I need to do is unorthodox and very specific. All I really need is a function I pass an address to and I get the 512 byte block back when an...
  6. SD read speed in raw 512 byte mode on Teensy 3.6 and 4.0

    I have a real-time audio application where I need to overlay audio samples in an output audio stream. The Teensy memory can't hold the samples, so they well be held on an SD card. I need high speed...
  7. SD write speed in raw mode - how many audio channels?

    I need to sample data streams and store the data on an SD card. To keep up, I'm going to store the data raw, which I read is done in 512 byte blocks. Assuming 16 bit samples, this translates to 32...
  8. I checked on the delta sigma stuff. It seems that...

    I checked on the delta sigma stuff. It seems that MQS is this just a DAC that uses a different methodology, but achieves that same outcome. Am I missing something?
  9. Teensy 4.: MQS pins - what are they, where can I read about them, are they supported?

    I'm researching how best to get around having no DAC on Teensy 4.0.
    I heard that something called an MQS pin can be used to substitute. I did a quick lap about looking for what MQS is and it appears...
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    Teensy 4.0: No DAC pin

    I have an audio project that has extreme latency requirements. Teensy 4.0 gets me faster processing I need, but I need to be smart about how I do DAC work. Are there any plans for additional form...
  11. Need pin\port\ADC mapping for Teensy 4.0

    I had trouble finding data on Teensy 3.6 pin\port\ADC mapping and had to dig it up on the forum.
    I need equivalent data for Teensy 4.0. Is it out there yet?
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