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@@ -9,6 +9,8 @@ The board has push button on PTA4 and LED on PTD7. The button works as 'a' key a |
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ELF board |
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This board acommodates 48QFN chip. |
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### prototypte pinout |
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- pcb layout https://deskthority.net/resources/image/33293 |
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- schematic https://deskthority.net/resources/image/33252 |
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@@ -21,17 +23,53 @@ ELF board |
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32 Bl 13 |
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31 .........24 23............ 14 |
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1 PTD6 12 PTC3 23 GND 34 PTE20 |
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1 PTD6 12 PTC3 23 GND 34 PTE20* |
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2 PTD5 13 PTC2 24 PTA18 35 PTA20 Reset |
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3 PTD4 14 PTC1 25 3.3V 36 PTA3 SWD_DIO |
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4 PTD3 15 PTC0 26 NMI 37 PTA0 SWD_CLK |
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5 PTD2 16 PTB17 27 PTA2 38 3.3V |
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6 PTD1 17 PTB16 28 PTA1 39 GND |
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7 PTD0 18 PTB3 29 PTE25 40 VBUS VREGIN |
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8 PTC7 19 PTB2 30 PTE24 41 USB D- |
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4 PTD3* 15 PTC0* 26 PTA4 NMI 37 PTA0 SWD_CLK |
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5 PTD2* 16 PTB17* 27 PTA2 38 3.3V |
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6 PTD1* 17 PTB16* 28 PTA1 39 GND |
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7 PTD0* 18 PTB3* 29 PTE25* 40 VBUS VREGIN |
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8 PTC7 19 PTB2* 30 PTE24* 41 USB D- |
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9 PTC6 20 PTB1 31 PTE30 42 USB D+ |
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10 PTC5 21 PTB0 32 PTE29 43 GND |
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11 PTC4 22 PTA19 33 PTE21 44 USB Shield |
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10 PTC5 21 PTB0 32 PTE29* 43 GND |
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11 PTC4 22 PTA19 33 PTE21* 44 USB Shield |
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TMK KL27Z breakout |
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------------------ |
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This board acommodates 48QFN chip. |
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### Pinputs |
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_\ conn /_ |
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1 28 |
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: : |
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: PROG : |
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: RST : |
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14 15 |
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---------- |
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1 VUSB 28 GND |
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2 VIN VREGIN 27 PTD4 |
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3 PTD5 26 PTC7 |
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4 PTD6 25 PTC6 |
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5 PTD7 24 PTC5 |
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6 PTE0* 23 PTC4 |
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7 3.3V 22 GND |
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8 PTE30 21 PTC3 |
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9 PTA0 SWD_CLK 20 PTC2 |
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10 PTA1 19 PTC1 |
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11 PTA2 18 PTB1 |
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12 PTA3 SWD_DIO 17 PTB0 |
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13 PTA4 NMI 16 PTA20 Reset |
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14 PTA18 15 PTA19 |
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#### Pinouts difference between 32QFN and 48QFN |
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48QFN doesn't have PTE0 |
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32QFN doesn't have PTD0-3, PTC0, PTE20-21,24,25,29, PTB2-3,16,17 |
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### ROM bootloader pins |
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See Reference Manual Chapter 13. |
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@@ -46,7 +84,7 @@ See Reference Manual Chapter 13. |
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PTC5 SPI0_SCK * |
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Due to errata e9457, need to pull-up `SPI0_SS_b`(or `SPI0_SCK`) to prevent false detection of SPI. |
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The errata doesn't refer UART though, `LPUART0_RX` also requires pull-up or down resisitor from experience. |
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The errata doesn't refer UART though, `LPUART0_RX` also requires pull-up or down resisitor from experience. |
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Without resistor it easily false-detects activity on UART interface with finger touch on the pin. |
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