Frdm Kl25z Pinouts Rev 1 0
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FRDM-KL25Z Pin usage and pinout chart FRDM-KL25Z Pins On-board Usage KL25Z128 Pins I/O Header & Pin Arduino™ R3 Pin Num Name FRDM-KL25Z Pin Name KL25Z Pin # ALT0 ALT1 ALT2 ALT3 ALT4 ALT5 ALT6 ALT7 Reset State/Function UART1_TX RTC_CLKOUT CMP0_OUT I2C1_SDA DISABLED UART1_RX SPI1_MISO I2C1_SCL DISABLED ― J2 20 D14 PTE0 1 PTE0 ― J2 18 D15 PTE1 2 PTE1 SPI1_MOSI ― J9 09 ― PTE2 3 PTE2 SPI1_SCK ― J9 11 ― PTE3 4 PTE3 SPI1_MISO ― J9 13 ― PTE4 5 PTE4 SPI1_PCS0 ― J9 15 ― PTE5 6 PTE5 Power ― ― VDD 7 VDD Power ― ― VSS 8 VSS VSS USB ― ― USB0_DP 9 USB0_DP USB0_DP DISABLED SPI1_MOSI DISABLED DISABLED DISABLED VDD USB ― ― USB0_DM 10 USB0_DM USB0_DM 2.2uF cap ― ― VOUT33 11 VOUT33 VOUT33 USB VBUS (5V) ― ― VREGIN 12 VREGIN ― J10 01 ― PTE20 13 ADC0_DP0/ADC0_SE0 PTE20 FTM1_CH0 UART0_TX ADC0_DP0/ADC0_SE0 ― J10 03 ― PTE21 14 ADC0_DM0/ADC0_SE4a PTE21 FTM1_CH1 UART0_RX ADC0_DM0/ADC0_SE4a ― J10 05 ― PTE22 15 ADC0_DP3/ADC0_SE3 PTE22 FTM2_CH0 UART2_TX ADC0_DP3/ADC0_SE3 ― J10 07 ― PTE23 16 ADC0_DM3/ADC0_SE7a PTE23 FTM2_CH1 UART2_RX ADC0_DM3/ADC0_SE7a VREGIN Power ― ― VDDA 17 VDDA VDDA Power J2 16 AREF* VREFH 18 VREFH VREFH Power ― ― VREFL 19 VREFL VREFL Power ― ― VSSA 20 VSSA ― J10 09 ― PTE29 21 CMP0_IN5/ADC0_SE4b PTE29 FTM0_CH2 FTM_CLKIN0 CMP0_IN5/ADC0_SE4b ― J10 11 ― PTE30 22 DAC0_OUT/ADC0_SE23/CMP0_IN4 PTE30 FTM0_CH3 FTM_CLKIN1 DAC0_OUT/ADC0_SE23/CMP0_IN4 ― J2 13 ― PTE31 23 PTE31 FTM0_CH4 Accelerometer I2C ― ― PTE24 24 PTE24 FTM0_CH0 I2C0_SCL Accelerometer I2C ― ― PTE25 25 PTE25 FTM0_CH1 I2C0_SDA Debug (SWD_CLK) ― ― PTA0 26 TSI0_CH1 PTA0 FTM0_CH5 ― J1 02 D0 PTA1 27 TSI0_CH2 PTA1 UART0_RX FTM2_CH0 VSSA DISABLED DISABLED DISABLED SWD_CLK SWD_CLK DISABLED ― J1 04 D1 PTA2 28 TSI0_CH3 PTA2 UART0_TX FTM2_CH1 Debug (SWD_DIO) ― ― PTA3 29 TSI0_CH4 PTA3 I2C1_SCL FTM0_CH0 SWD_DIO DISABLED ― J1 10 D4 PTA4 30 TSI0_CH5 PTA4 I2C1_SDA FTM0_CH1 NMI_b ― J1 12 D5 PTA5 31 PTA5 USB_CLKIN FTM0_CH2 DISABLED ― J1 08 D3 PTA12 32 PTA12 FTM1_CH0 DISABLED ― J2 02 D8 PTA13 33 PTA13 FTM1_CH1 DISABLED Accelerometer INT1 ― ― PTA14 34 PTA14 SPI0_PCS0 UART0_TX DISABLED Accelerometer INT2 ― ― PTA15 35 PTA15 SPI0_SCK UART0_RX ― J2 09 ― PTA16 36 PTA16 SPI0_MOSI SPI0_MISO DISABLED ― J2 11 ― PTA17 37 PTA17 SPI0_MISO SPI0_MOSI DISABLED Power ― ― VDD 38 VDD Power ― ― VSS 39 VSS 8MHz XTAL 8MHz XTAL ― ― ― ― PTA18 PTA19 40 41 EXTAL0 XTAL0 Reset J9 06 ― PTA20 42 ― J10 02 A0 PTB0 43 ― J10 04 A1 PTB1 ― J10 06 A2 PTB2 ― J10 08 A3 ― J9 01 ― ― J9 03 ― ― SWD_DIO NMI_b DISABLED VDD VSS PTA18 PTA19 UART1_RX UART1_TX PTA20 FTM_CLKIN0 FTM_CLKIN1 EXTAL0 XTAL0 LPTMR0_ALT1 RESET_b RESET_b ADC0_SE8/TSI0_CH0 PTB0/LLWU_P5 I2C0_SCL FTM1_CH0 ADC0_SE8/TSI0_CH0 44 ADC0_SE9/TSI0_CH6 PTB1 I2C0_SDA FTM1_CH1 ADC0_SE9/TSI0_CH6 45 ADC0_SE12/TSI0_CH7 PTB2 I2C0_SCL FTM2_CH0 ADC0_SE12/TSI0_CH7 PTB3 46 ADC0_SE13/TSI0_CH8 PTB3 I2C0_SDA FTM2_CH1 ADC0_SE13/TSI0_CH8 PTB8 47 PTB8 EXTRG_IN DISABLED ― PTB9 48 PTB9 J9 05 ― PTB10 49 PTB10 SPI1_PCS0 DISABLED J9 07 ― PTB11 50 PTB11 SPI1_SCK DISABLED DISABLED Touch Slider ― ― PTB16 51 TSI0_CH9 PTB16 SPI1_MOSI UART0_RX FTM_CLKIN0 SPI1_MISO TSI0_CH9 Touch Slider ― ― PTB17 52 TSI0_CH10 PTB17 SPI1_MISO UART0_TX FTM_CLKIN1 SPI1_MOSI TSI0_CH10 Red LED ― ― PTB18 53 TSI0_CH11 PTB18 FTM2_CH0 Green LED ― ― PTB19 54 TSI0_CH12 PTB19 FTM2_CH1 ― J1 03 ― PTC0 55 ADC0_SE14/TSI0_CH13 PTC0 EXTRG_IN ― J10 12 A5 PTC1 56 ADC0_SE15/TSI0_CH14 PTC1/LLWU_P6/RTC_CLKIN I2C1_SCL FTM0_CH0 ― J10 10 A4 PTC2 57 ADC0_SE11/TSI0_CH15 PTC2 I2C1_SDA FTM0_CH1 ― J1 05 ― PTC3 58 Power ― ― VSS 59 VSS VSS Power ― ― VDD 60 VDD VDD ― J1 07 ― PTC4 61 PTC4/LLWU_P8 SPI0_PCS0 UART1_TX ― J1 09 ― PTC5 62 PTC5/LLWU_P9 SPI0_SCK LPTMR0_ALT2 ― J1 11 ― PTC6 63 CMP0_IN0 PTC6/LLWU_P10 SPI0_MOSI EXTRG_IN ― J1 01 ― PTC7 64 CMP0_IN1 PTC7 SPI0_MISO ― J1 14 D6 PTC8 65 CMP0_IN2 PTC8 I2C0_SCL FTM0_CH4 ― J1 16 D7 PTC9 66 CMP0_IN3 PTC9 I2C0_SDA FTM0_CH5 ― J1 13 ― PTC10 67 PTC10 I2C1_SCL ― J1 15 ― PTC11 68 PTC11 I2C1_SDA ― J2 01 ― PTC12 69 PTC12 FTM_CLKIN0 DISABLED ― J2 03 ― PTC13 70 PTC13 FTM_CLKIN1 DISABLED ― J2 05 ― PTC16 71 PTC16 ― J2 07 ― PTC17 72 PTC17 ― J2 06 D10 PTD0 73 PTD0 SPI0_PCS0 FTM0_CH0 DISABLED Blue LED J2 12 D13 PTD1 74 PTD1 SPI0_SCK FTM0_CH1 ADC0_SE5b ― J2 08 D11 PTD2 75 PTD2 SPI0_MOSI UART2_RX FTM0_CH2 SPI0_MISO DISABLED ― J2 10 D12 PTD3 76 PTD3 SPI0_MISO UART2_TX FTM0_CH3 SPI0_MOSI DISABLED ― J1 06 D2 PTD4 77 PTD4/LLWU_P14 SPI1_PCS0 UART2_RX FTM0_CH4 DISABLED ― J2 04 D9 PTD5 78 ADC0_SE6b PTD5 SPI1_SCK UART2_TX FTM0_CH5 ADC0_SE6b ― J2 17 ― PTD6 79 ADC0_SE7b PTD6/LLWU_P15 SPI1_MOSI UART0_RX SPI1_MISO ADC0_SE7b ― J2 19 ― PTD7 80 PTD7 SPI1_MISO UART0_TX SPI1_MOSI DISABLED Power J2 14 GND GND ― J2 15 ― ― ― J9 02 RFU SDA_PTD5 Power J9 04 IOREF P3V3 Power J9 08 3.3V P3V3 Power J9 10 5V P5V_USB Power J9 12 GND GND Power Power J9 14 J9 16 GND VIN GND P5-9V_VIN PTC3/LLWU_P7 ADC0_SE5b * AREF is not connected to VREFH by default. VREFH is connected to P3V3_KL25Z by default. To supply an external AREF, cut the trace SH1 and install a 0ohm resistor or a wire short on R3. = valid signal options UART1_RX TSI0_CH11 TSI0_CH12 CMP0_OUT FTM0_CH2 ADC0_SE14/TSI0_CH13 ADC0_SE15/TSI0_CH14 ADC0_SE11/TSI0_CH15 CLKOUT DISABLED FTM0_CH3 DISABLED CMP0_OUT DISABLED SPI0_MISO CMP0_IN0 SPI0_MOSI CMP0_IN1 CMP0_IN2 CMP0_IN3 DISABLED DISABLED DISABLED DISABLED FRDM-KL25Z I/O Connector signal connections J1 J2 J9 J10 Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal J1 01 PTC7 J1 02 PTA1 J2 01 PTC12 J2 02 PTA13 J9 01 PTB8 J9 02 SDA_PTD5 J10 01 PTE20 J10 02 PTB0 J1 03 PTC0 J1 04 PTA2 J2 03 PTC13 J2 04 PTD5 J9 03 PTB9 J9 04 P3V3 J10 03 PTE21 J10 04 PTB1 J1 05 PTC3 J1 06 PTD4 J2 05 PTC16 J2 06 PTD0 J9 05 PTB10 J9 06 PTA20 J10 05 PTE22 J10 06 PTB2 J1 07 PTC4 J1 08 PTA12 J2 07 PTC17 J2 08 PTD2 J9 07 PTB11 J9 08 P3V3 J10 07 PTE23 J10 08 PTB3 J1 09 PTC5 J1 10 PTA4 J2 09 PTA16 J2 10 PTD3 J9 09 PTE2 J9 10 P5V_USB J10 09 PTE29 J10 10 PTC2 J1 11 PTC6 J1 12 PTA5 J2 11 PTA17 J2 12 PTD1 J9 11 PTE3 J9 12 GND J10 11 PTE30 J10 12 PTC1 J1 13 PTC10 J1 14 PTC8 J2 13 PTE31 J2 14 GND J9 13 PTE4 J9 14 GND J1 15 PTC11 J1 16 PTC9 J2 15 NC J2 16 VREFH J9 15 PTE5 J9 16 P5-9V_VIN J2 17 PTD6 J2 18 PTE1 J2 19 PTD7 J2 20 PTE0 FRDM-KL25Z Arduino™ R3 pin layout compatibility comparison chart D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 A0 A1 A2 A3 A4 A5 Arduino Uno R3 FREEDOM-KL25Z (PTA1) Arduino Uno R3 FREEDOM-KL25Z (PTA2) Arduino Uno R3 FREEDOM-KL25Z (PTD4) Arduino Uno R3 FREEDOM-KL25Z (PTA12) Arduino Uno R3 FREEDOM-KL25Z (PTA4) Arduino Uno R3 FREEDOM-KL25Z (PTA5) Arduino Uno R3 FREEDOM-KL25Z (PTC8) Arduino Uno R3 FREEDOM-KL25Z (PTC9) Arduino Uno R3 FREEDOM-KL25Z (PTA13) Arduino Uno R3 FREEDOM-KL25Z (PTD5) Arduino Uno R3 FREEDOM-KL25Z (PTD0) Arduino Uno R3 FREEDOM-KL25Z (PTD2) Arduino Uno R3 FREEDOM-KL25Z (PTD3) Arduino Uno R3 FREEDOM-KL25Z (PTD1) Arduino Uno R3 FREEDOM-KL25Z (PTE0) Arduino Uno R3 FREEDOM-KL25Z (PTE1) Arduino Uno R3 FREEDOM-KL25Z (PTB0) Arduino Uno R3 FREEDOM-KL25Z (PTB1) Arduino Uno R3 FREEDOM-KL25Z (PTB2) Arduino Uno R3 FREEDOM-KL25Z (PTB3) Arduino Uno R3 FREEDOM-KL25Z (PTC2) Arduino Uno R3 FREEDOM-KL25Z (PTC1) UART PWM GPIO Interrupt I2C SPI A/D RX UART0_RX FTM2_CH0 TX UART0_TX FTM2_CH1 FTM0_CH4 FTM1_CH0 FTM0_CH1 FTM0_CH2 FTM0_CH4 X I2C0_SCL FTM0_CH5 X I2C0_SDA FTM1_CH1 FTM0_CH5 FTM0_CH0 SPI0_PCS0 UART2_RX FTM0_CH2 SPI0_MOSI UART2_TX FTM0_CH3 SPI0_MISO FTM0_CH1 SPI0_SCK ADC0_SE5b SDA A4 X I2C1_SDA X SCL A5 X I2C1_SCL X A0 X I2C0_SCL ADC0_SE8 A1 X I2C0_SDA ADC0_SE9 A2 X I2C0_SCL ADC0_SE12 A3 X I2C0_SDA ADC0_SE13 SDA A4 X I2C1_SDA ADC0_SE11 SCL A5 X I2C1_SCL ADC0_SE15 Input Capture Comparator LED FTM2_CH0 FTM2_CH1 FTM0_CH4 FTM1_CH0 FTM0_CH1 FTM0_CH2 FTM0_CH4 FTM0_CH5 FTM1_CH1 COMP0_IN2 COMP0_IN3 FTM0_CH5 FTM0_CH0 FTM0_CH2 FTM0_CH3 FTM0_CH1 FTM1_CH0 FTM1_CH1 FTM2_CH0 FTM2_CH1 FTM0_CH1 OpenSDA Pinouts K20 32QFN Pin Name Use Case DEFAULT ALT0 VDD VDD 1 VDD 3.3V 2 VSS GND VSS VSS 3 USB0_DP USB D+ USB0_DP USB0_DP 4 USB0_DM USB D- USB0_DM USB0_DM 5 VOUT33 2.2uF to GND VOUT33 VOUT33 6 VREGIN USB VBUS (5V) VREGIN VREGIN 7 VDDA 3.3V VDDA VDDA 8 VSSA GND VSSA VSSA 9 XTAL32 No Connect - pads for XTAL available XTAL32 XTAL32 10 EXTAL32 No Connect - pads for XTAL available EXTAL32 EXTAL32 11 VBAT No Connect 12 PTA0 13 ALT1 ALT2 ALT3 ALT4 ALT5 ALT6 ALT7 VBAT VBAT Debug Connector JTAG_TCLK/SWD_CLK/EZP_CLK TSI0_CH1 PTA0 UART0_CTS_b/UART0_COL_b FTM0_CH5 PTA1 Debug Connector JTAG_TDI/EZP_DI TSI0_CH2 PTA1 UART0_RX FTM0_CH6 JTAG_TDI 14 PTA2 Debug Connector JTAG_TDO/TRACE_SWO/EZP_DO TSI0_CH3 PTA2 UART0_TX FTM0_CH7 JTAG_TDO/TRACE_SWO 15 PTA3 Debug Connector JTAG_TMS/SWD_DIO TSI0_CH4 PTA3 UART0_RTS_b FTM0_CH0 JTAG_TMS/SWD_DIO 16 PTA4/LLWU_P3 SWD_EN (disconnecto SPI port from target) NMI_b/EZP_CS_b TSI0_CH5 PTA4/LLWU_P3 FTM0_CH1 17 PTA18 8MHz resonator EXTAL0 EXTAL0 PTA18 FTM0_FLT2 FTM_CLKIN0 18 PTA19 8MHz resonator PTA19 FTM1_FLT0 FTM_CLKIN1 19 RESET_b Voltage divider to USB VBUS 20 PTB0/LLWU_P5 21 PTB1 22 PTC1/LLWU_P6 SPI Flash Reset 23 PTC2 SPI Flash CS 24 PTC3/LLWU_P7 25 PTC4/LLWU_P8 26 JTAG_TCLK/SWD_CLK NMI_b XTAL0 XTAL0 RESET_b RESET_b SWD_OE (Output Buffer Enable) ADC0_SE8/TSI0_CH0 ADC0_SE8/TSI0_CH0 PTB0/LLWU_P5 I2C0_SCL FTM1_CH0 RESET Output to target MCU ADC0_SE9/TSI0_CH6 ADC0_SE9/TSI0_CH6 PTB1 I2C0_SDA FTM1_CH1 ADC0_SE15/TSI0_CH14 ADC0_SE15/TSI0_CH14 PTC1/LLWU_P6 SPI0_PCS3 UART1_RTS_b FTM0_CH0 I2S0_TXD0 ADC0_SE4b/CMP1_IN0/TSI0_CH15 ADC0_SE4b/CMP1_IN0/TSI0_CH15 PTC2 SPI0_PCS2 UART1_CTS_b FTM0_CH1 I2S0_TX_FS Connect to target MCU TX pin CMP1_IN1 CMP1_IN1 PTC3/LLWU_P7 SPI0_PCS1 UART1_RX FTM0_CH2 Connect to target MCU RX pin DISABLED PTC4/LLWU_P8 SPI0_PCS0 UART1_TX FTM0_CH3 CMP1_OUT PTC5/LLWU_P9 SWD_CLK to target MCU, SPI to SPI Flash DISABLED PTC5/LLWU_P9 SPI0_SCK LPTMR0_ALT2 I2S0_RXD0 CMP0_OUT 27 PTC6/LLWU_P10 SWD_DIO to 74*126, SPI to SPI Flash CMP0_IN0 CMP0_IN0 PTC6/LLWU_P10 SPI0_SOUT PDB0_EXTRG I2S0_RX_BCLK I2S0_MCLK 28 PTC7 SWD_DIO to target MCU, SPI Flash CMP0_IN1 CMP0_IN1 PTC7 SPI0_SIN USB_SOF_OUT I2S0_RX_FS 29 PTD4/LLWU_P14 Green LED (may no-pop) PTD4/LLWU_P14 SPI0_PCS1 UART0_RTS_b FTM0_CH4 EWM_IN 30 PTD5 Special case -- connected to IO header ADC0_SE6b ADC0_SE6b PTD5 SPI0_PCS2 UART0_CTS_b/UART0_COL_b FTM0_CH5 EWM_OUT_b 31 PTD6/LLWU_P15 Special case -- connected to RTC_CLKIN ADC0_SE7b ADC0_SE7b PTD6/LLWU_P15 SPI0_PCS3 UART0_RX FTM0_CH6 FTM0_FLT0 32 PTD7 USB 5V Power Sense PTD7 CMT_IRO UART0_TX FTM0_CH7 FTM0_FLT1 DISABLED DISABLED LPTMR0_ALT1 FTM1_QD_PHA FTM1_QD_PHB CLKOUT I2S0_TX_BCLK
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