topic Re: Schematic Review in Kinetis Microcontrollers

Schematic Review

christopherhuds — Fri, 12 Jun 2015 12:27:40 GMT

Attached is my schematic for MK20FN1M0VLQ12. Can someone check it for me to see if I missed something? Is power correct? Oscillator, SPI, and especially JTAG for use with the P&E wiggler?

The intent is 4 analog inputs using all 4 converters (PTB0, PTB1, PTE8,PTE11)

Using all 3 SPI buss SPI0 (memory), SP1(left DAC), SP2 (right DAC) <--I want parallelism on DAC loads instead of sequential and memory to hold my code (which is larger than on-chip memory)

Using JTAG port for use with: P&E Microcomputer Systems - USB Multilink Universal FX - USB Multilink Universal FX All-In-One Development Interface - H…

Various GPIO's & RTC will be used.

Re: Schematic Review

mjbcswitzerland — Sat, 13 Jun 2015 19:48:48 GMT

Christopher

You need to connect the 12MHz external oscillator to EXTAL and not XTAL.

Could you expain the bit about the code in the external SPI Flash? Will you be loading parts of it into RAM and running it there (since code can't be run directly from SPI flash)?

Regards

Mark

Kinetis: µTasker Kinetis support

K20: µTasker Kinetis TWR-K20D72M support / µTasker Kinetis FRDM-K20D50M support / µTasker Kinetis TWR-K20D50M support / µTasker Teensy3.1 support

K60: µTasker Kinetis TWR-K60N512 support / µTasker Kinetis TWR-K60D100M support / µTasker Kinetis TWR-K60F120M support

ADC/DAC: http://www.utasker.com/docs/uTasker/uTaskerADC.pdf

For the complete "out-of-the-box" Kinetis experience and faster time to market

Re: Schematic Review

jeremyzhou — Mon, 15 Jun 2015 02:04:59 GMT

Hi Christopher,

After had a brief look through the statement above, I've found out two places that need to fix.

1. The 12 MHz on-board clock oscillator should connect the EXTAL0 instead of the XTAL0.

2. Please refer to the attachment to design the debug interface.
Have a great day,
Ping

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Re: Schematic Review

christopherhuds — Mon, 15 Jun 2015 11:13:21 GMT

yes, thanks for reviewing.

there will either be a bootloader on-chip that will load code from memory as it needs OR my code will be on-chip. The "big" portion i refer to is some audio warnings that are played for various modes that the processor will encounter. hopefully my code port can stay relatively small so it will fit in memory.