X-Git-Url: https://git.friedersdorff.com/?a=blobdiff_plain;f=keyboard%2Fkl27z_onekey%2FREADME.md;h=c2db5e5c56476fa3a3cd20432fbda974cbc05ffb;hb=HEAD;hp=11a32169f6987c671055b3e1efe7674d63241563;hpb=c7a79ff47e83a61cfa07cad35067be02896edbce;p=max%2Ftmk_keyboard.git

diff --git a/keyboard/kl27z_onekey/README.md b/keyboard/kl27z_onekey/README.md
index 11a32169..c2db5e5c 100644
--- a/keyboard/kl27z_onekey/README.md
+++ b/keyboard/kl27z_onekey/README.md
@@ -7,8 +7,94 @@ 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
+
+
+    39 .....  44 \ conn / 1 ..... 6
+    38           |______|    LED  7
+     :  Rst                       :
+     :                            :
+    32  Bl                        13
+    31 .........24 23............ 14
+
+    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
+    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
+
+
+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
+
+
+#### 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