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- KL27Z128/256 board
- ==================
- 2016/11/30
-
- KL27Z is configured to use internal 48MHz RC oscillator.
-
- The board has push button on PTA4 and LED on PTD7. The button works as 'a' key and the LED as an indicator for capslock.
-
-
- ELF board
- ---------
- This board acommodates 48QFN chip.
-
- ### prototypte pinout
- - pcb layout https://deskthority.net/resources/image/33293
- - schematic https://deskthority.net/resources/image/33252
-
-
- ```
- G G
- N 5 D D N F D D D D D D
- D V - + D G \ USB / 6 5 4 3 2 1
- ,--------------------- | Conn | --------------------.
- |39 40 41 42 43 44 | | 1 2 3 4 5 6 |
- 3.3V|38 |_________| 7 |D0
- A0|37 RST 8 |C7
- A3|36 9 |C6
- +A20|35 10|C5+
- E20|34 11|C4
- E21|33 BL 12|C3
- E29|32 13|C2
- |31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14|
- `-------------------------------------------------------'
- E E E A A A 3 A G A C B B B B B C C
- 3 2 2 1 2 4 . 1 N 1 1 1 2 3 1 1 0 1
- 0 4 5 + + 3V 8 D 9 6 7
-
-
- 1 PTD6 12 PTC3 23 GND 34 PTE20*
- 2 PTD5 13 PTC2 24 PTA18 35 PTA20/Reset+
- 3 PTD4 14 PTC1 25 3.3V 36 PTA3/SWD_DIO
- 4 PTD3* 15 PTC0* 26 PTA4/NMI+ 37 PTA0/SWD_CLK
- 5 PTD2* 16 PTB17* 27 PTA2 38 3.3V
- 6 PTD1* 17 PTB16* 28 PTA1+ 39 GND
- 7 PTD0* 18 PTB3* 29 PTE25* 40 VBUS/VREGIN/5V
- 8 PTC7 19 PTB2* 30 PTE24* 41 USB D-
- 9 PTC6 20 PTB1 31 PTE30 42 USB D+
- 10 PTC5+ 21 PTB0 32 PTE29* 43 GND
- 11 PTC4 22 PTA19 33 PTE21* 44 USB Shield/FB
- +: Pins with resistor or switch
- *: Pins which don't exist in QFN32
- ```
-
-
- TMK KL27Z breakout
- ------------------
- This board acommodates 48QFN chip.
-
- ### Pinputs
-
- _\ conn /_
- 1 28
- : :
- : PROG :
- : RST :
- 14 15
- ----------
-
- 1 VUSB 28 GND
- 2 VIN/VREGIN 27 PTD4
- 3 PTD5 26 PTC7
- 4 PTD6 25 PTC6
- 5 PTD7 24 PTC5+
- 6 PTE0* 23 PTC4
-
- 7 3.3V 22 GND
- 8 PTE30 21 PTC3
- 9 PTA0/SWD_CLK 20 PTC2
- 10 PTA1+ 19 PTC1
- 11 PTA2 18 PTB1
- 12 PTA3/SWD_DIO 17 PTB0
- 13 PTA4/NMI+ 16 PTA20/Reset+
- 14 PTA18 15 PTA19
- *: Pin which doesn't exist in QFN48
-
-
- #### Pinouts difference between 32QFN and 48QFN
- 48QFN doesn't have PTE0
- 32QFN doesn't have PTD0-3, PTC0, PTE20-21,24,25,29, PTB2-3,16,17
-
- ### ROM bootloader pins
- See Reference Manual Chapter 13.
-
- PTA2 LPUART0_TX
- PTA1 LPUART0_RX *
- PTB0 I2C0_SCL
- PTB1 I2C0_SDA
- PTC4 SPI0_SS_b *
- PTC7 SPI0_MISO
- PTC6 SPI0_MOSI
- PTC5 SPI0_SCK *
-
- Due to errata e9457, need to pull-up `SPI0_SS_b`(or `SPI0_SCK`) to prevent false detection of SPI.
- The errata doesn't refer UART though, `LPUART0_RX` also requires pull-up or down resisitor from experience.
- Without resistor it easily false-detects activity on UART interface with finger touch on the pin.
-
-
-
-
- Resources
- ---------
- ### Deskthority thread
- https://deskthority.net/workshop-f7/can-we-design-the-teensy-alternative-for-keyboards-t13662-510.html
-
- ### Kinetis KL2x
- http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/l-series-ultra-low-power-m0-plus/kinetis-kl2x-48-mhz-usb-ultra-low-power-microcontrollers-based-on-arm-cortex-m0-plus:KL2x
-
- ### KL27Z128/256 Data Sheet
- http://www.nxp.com/assets/documents/data/en/data-sheets/KL27P64M48SF6.pdf
-
- ### KL27Z128/256 Reference Manual
- http://www.nxp.com/assets/documents/data/en/reference-manuals/KL27P64M48SF6RM.pdf
-
- ### Errata
- http://www.nxp.com/assets/documents/data/en/errata/KINETIS_L_1N71K.pdf
-
- >>
- e9457: Kinetis Flashloader/ ROM Bootloader: The peripheral auto-detect code in
- bootloader can falsely detect presence of SPI host causing non-responsive
- bootloader
- Description: During the active peripheral detection process, the bootloader can interpret spurious data on
- the SPI peripheral as valid data. The spurious data causes the bootloader to shutdown all
- peripherals except the “falsely detected" SPI and enter the command phase loop using the
- SPI. After the bootloader enters the command phase loop using the SPI, the other peripherals
- are ignored, so the desired peripheral is no longer active.
- The bootloader will not falsely detect activity on the I2C, UART, or USB interfaces, so only the
- SPI interface is affected.
- Workaround: Ensure that there is an external pull-up on the SPI chip-select pin or that the pin is driven high.
- This will prevent the bootloader from seeing spurious data due to activity on the SPI clock pin.
-
- ### Kinetis Bootloader and blhost
- http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/kinetis-symbols-footprints-and-models/kinetis-bootloader:KBOOT
-
-
- Build
- -----
-
- make
-
-
- Program
- -------
- Flash firmware with ROM bootloader.
-
- blhost -u -- flash-image build/kl27z.hex erase
-
-
- TODO
- ----
- - Fix boards/ELF files
- - add macro `USBx_CTL_RESUME` to ChibiOS-Contrib/os/common/ext/CMSIS/KINETIS/kl27zxxx.h
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