--- /dev/null
+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
projects / max / tmk_keyboard.git / blobdiff