ELF board
---------
+This board acommodates 48QFN chip.
+
### prototypte pinout
- pcb layout https://deskthority.net/resources/image/33293
- schematic https://deskthority.net/resources/image/33252
32 Bl 13
31 .........24 23............ 14
- 1 PTD6 12 PTC3 23 GND 34 PTE20
+ 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 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-
+ 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
+ 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.
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.
+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.