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Type: Posts; User: DavidWH1968

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    You are right. ADC's in MCU's are in VERY close...

    You are right. ADC's in MCU's are in VERY close proximity to many other peripherals which can introduce their own noise and compromise the integrity of an analog signal. Discrete ADC's are still...
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    Agreed about the stability. The greater distance...

    Agreed about the stability.
    The greater distance between capacitors and pins would not likely affect performance at stock (or lower) clock speeds. However, for those of us (and I'm sure there are a...
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    @mlewus: I misunderstood. I thought you were...

    @mlewus: I misunderstood. I thought you were asking for FreeRTOS up front. The good thing is it probably won't be long before someone has a version ported to the Arduino IDE posted on GitHub.
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    Again, this is adding more complexity to the job...

    Again, this is adding more complexity to the job of porting. Porting an operating system is absolutely not an easy task. (Unless you happen to know that OS inside and out ... maybe.) I think the...
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    The sacrifice for no components on the bottom...

    The sacrifice for no components on the bottom side of the board would likely be long term stability when utilizing the processor at the edge of it's performance limits. You probably also give up any...
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    It would be easily possible to just have one...

    It would be easily possible to just have one version with a TSSOP footprint for a 16-bit SDRAM (or preferably two footprints to utilize the external 32bit wide memory bus) and still have a huge...
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    Some thoughts regarding the new RT1176 board: ...

    Some thoughts regarding the new RT1176 board:

    One of the nice things about the Teensy boot-loader is that @PaulStoffregen has only included essential startup code and some lightweight debugging...
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    Bluetooth is not built into the iMX RT1176,...

    Bluetooth is not built into the iMX RT1176, therefore it would mean added hardware on the board. Probably best to let those who need it add it themselves via a daughter board.

    MicroSD / SD reader...
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    I'm not sure how many people typically will put...

    I'm not sure how many people typically will put those castellated holes to use if they are there, since the only real benefit comes from using them to surface mount a packaged part. And that might...
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    My personal thinking is that the format of the...

    My personal thinking is that the format of the Teensy developement boards is what made them a hit in the first place. The fact that a 600MHz Cortex M7 powered microcontroller is on the Teensy 4.0...
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    This is exactly the problem with the high density...

    This is exactly the problem with the high density connectors. For development boards that use them, the breakout boards are few, and they tend to be expensive. And, like you said, you end up using...
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    Frank B: The format of the board can remain...

    Frank B: The format of the board can remain similar and fairly small like the current board. It will have to be bigger just to accommodate the RT1176 package. Nothing to do about that. But the...
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    Armadafg: I'm with you on that. The format of...

    Armadafg: I'm with you on that. The format of the T4 and T41 is very nice. Well laid out, easily accessible functionality. And, if the format of the board is changed too much will it still be...
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    Tiny connectors complicate prototyping, and some...

    Tiny connectors complicate prototyping, and some require the use of either hot air or a re-flow oven and using solder paste. Additional setup complexity is the opposite of what we want when...
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    The solution is to solder one row on either side...

    The solution is to solder one row on either side so they will insert into the breadboard, the remaining rows get soldered facing up when inserted into the breadboard. all pins available and still...
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    The "absolute maximum" switching frequency of the...

    The "absolute maximum" switching frequency of the RT117x series is listed as 208MHz (i.MX RT1170 Crossover Processors Data Sheet for Consumer Products, Rev. 0, 12/2020, page 50, table 38). Since the...
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    Good idea. After all, this is supposed to be a...

    Good idea. After all, this is supposed to be a discussion about the next Teensy, not signal integrity.
    Sorry for the off-topic discussion.
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    Still, the noise levels are fairly minimal. ...

    Still, the noise levels are fairly minimal. Mostly less than -70db above 1GHz, and nothing higher than about -55db. This type of noise is easily suppressible with grounds added between transmission...
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    This noise is not from the frequency of the CPU,...

    This noise is not from the frequency of the CPU, but is more from the edge rate when switching. The RT1062 does have adjustable edge rates, so if you are using a lower switching frequency you can...
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    Agreed! The idea of 50mil headers makes me...

    Agreed! The idea of 50mil headers makes me cringe! It also defeats the idea behind these boards: A convenient and rapid way to prototype using breadboards.

    I'm also in agreement about the RF...
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    This is true, and many manufacturers have...

    This is true, and many manufacturers have followed suit since it speeds the development of ever more complex libraries. These also help to get those of us that have more experience up and running...
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    My current application is similar. A display...

    My current application is similar. A display accelerator for a retro-style computer. It's actually fast enough for a 2msec screen clear at 800x480x16bits. Also fast enough for a basic 3d library...
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    As far as their libraries go they are what most...

    As far as their libraries go they are what most any other manufacturer provided libraries are: Turned out quickly and not optimized. I've run into this with virtually all supplier related...
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    Yes, the TRNG will enable that.

    Yes, the TRNG will enable that.
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    No one ever said you have to put the second row...

    No one ever said you have to put the second row of pins facing the same direction as the first row, or that it had to be a row of pins for that matter. Just put the pins one the board with on row...
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    MeBoop: I second your opinion of the RA8875/6/7!...

    MeBoop: I second your opinion of the RA8875/6/7! Any GPU that is so slow that you can actually watch the screen update is terrible! The GPU in the 1176 promises to bring REAL graphics...
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    Frank B: I fully agree with you about the real...

    Frank B:
    I fully agree with you about the real need for 8 serial ports. If one were to be developing a multi-port serial hub for a project it's quite unlikely that an MCU as powerful as this is...
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    Agreed! The JTAG debug pins will be necessary...

    Agreed! The JTAG debug pins will be necessary for debugging more complex firmware/software. (And with the RT1176 many will be adding more functionality/complexity to projects implemented on the...
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    I think NXP has only just released a proper SDK...

    I think NXP has only just released a proper SDK for the RT117x family. The beta testers have been using the RT1160 SDK and limited RT1170 documentation, and it's only partially compatible with the...
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