2 1 2 SMD 0402 10nF C19 SPI1_CS SPI1_CLK 1 2 3 4 5 Y1 3 SMD 0402 50V 12pF 50V SPI1_MOSI C17 IRQ0_SPIRIT1 SPI1_MISO SMD 0402 330pF C3 1 IRQ1_SPIRIT1 SMD 0402 1 2 1 50V 10pF C18 SMD 0402 1 SMD 0402 50V CAV2P 100pF C2 16V GND NX2016SA-52MHZ SPIRIT1 GPIO_0 SDO SDI SCLK CSn U2 C4 100nF SMD 0402 50V 2 1 C1 IRQ2_SPIRIT1 10V IRQ3_SPIRIT1 20 19 18 17 16 TBD SMD 0402 50V C20 GND 21 IRQ1_SPIRIT1 IRQ0_SPIRIT1 IRQ3_SPIRIT1 IRQ2_SPIRIT1 C14 TBD 50V SMD 0402 GND 3.9 pF for 315 MHz 2.2 pF for 433 MHz 2.2 pF for 868 MHz 2 pF for 915/920 MHz Not Mounted for 315/433 MHz 22 nH for 868 MHz 15 nH for 915/920 MHz L12 TBD SMD 0402 EXPAD SDN SMPS_Ext1 SMPS_Ext2 TX REXT 1 2 3 4 15 SDN_SPIRIT1 14 13 12 11 4 HEADER J3 1 L1 10uH TBD TBD0402 SMD TBD L13 L2 TBD TBD C15 2 L8 TBD TBD 1 1.2 pF for 315 MHz Not Mounted for 433/868/915/920 MHz SMD 0402 16V C10 10V SMD 0402 TBD C5 L9 TBD TBD SMD 0402 50V C11 50V 2 C16 SMD 0402 12 nH for 315 MHz 10 nH for 433 MHz 0R0 for 868 MHz 5.1 nH for 915/920 MHz 1 12 pF for 315 MHz 8.2 pF for 433 MHz NM for 868 MHz 7 pF for 915/920 MHz 2 SMD 0402 1 SMD 0402 L6 TBD SMD 0402 2 TBD 2 15 pF for 315 MHz 10 pF for 433 MHz 5.6 pF for 868 MHz 3.6 pF for 915/920 MHz SMD 0402 330pF C7 TBD SMD 0402 50V C13 15 nH for 315 MHz 6.2 nH for 433 MHz 2.7 nH for 868 MHz Not Mounted for 915/920 MHz 1 SMD 0402 L10 TBD SMD 0402 50V 16V 1 16V 15 nH for 315 MHz 10 nH for 433 MHz 4.3 nH for 868 MHz 0R0 for 915/920 MHz 1 TBD C12 2 C8 SMD 0402 100nF C6 27 pF for 315 MHz 18 pF for 433 MHz 8.2 pF for 868 MHz 2.4 pF for 915/920 MHz 220pF 2 1.8 pF for 315/433 MHz 1.2pF for 868 MHz Not Mounted for 915 MHz 1 uF for 315/433/915/920 MHz 470 nF for 868 MHz TBD SMD 0402 12 nH for 315 MHz 8.2 nH for 433 MHz 3.0 nH for 868 MHz 3.6 nH for 915/920 MHz 1 50V SMD 0402 4.7 pF for 315 MHz 3.3 pF for 433 MHz 1.8 pF for 868 MHz 1.5 pF for 915/920 MHz 2 2 220 nH for 315 MHz 150 nH for 433 MHz 100 nH for 868/915/920 MHz SMD 0402 L5 220 pF for 315/433/868 MHz 330 pF for 915/920 MHz 47 nH for 315 MHz 39 nH for 433 MHz 18 nH for 868 MHz 15 nH for 915/920 MHz 1 1 SMD 0402 270 nH for 315 MHz 100 nH fo TrB4D 33 MHz 27 nH for 868/915/920 MHz 2 SMD 0402 39 nH for 315 MHz 27 nH for 433 MHz 18 nH for 868/915 MHz L11 10uH SMD 0805 2 1 VDD CAV1 2 1 1 2 1 2 1uF 2 1 2 4 1 2 1 2 2 2 1 1 2 GPIO_1 GPIO_2 GPIO_3 VR_DIG VDD_SMPS XOUT XIN VDD_DIG RFp RFn 6 7 8 9 10 1 2 2 1 2 1 1 2 1 2 50V 220pF SMD 0402 2 C9 1 1 50V 50V GND1 GND 220pF SMD 0402 2 C36 U.FL connector 2 U6 SIG 1 2 3 1 2 1 2 1 L3 91 nH for 315 MHz 30 nH for 433 MHz 4.3 nH for 868 MHz 8.7 nH for 915/920 MHz L7 SMD 0603 1 33 nH for 315 MHz 16 nH for 433 MHz 8.2 nH for 868 MHz 7.5 nH for 915/920 MHz 2 TBD 390 nH for 315 MHz 220 nH for 433 MHz 47 nH for 868 MHz 39 nH for 915/920 MHz SMD 0603 TBD L4 AM11DG-ST01 Mitsubishi 315/433/868/915 MHz ANT1 SMD 0603 TBD 2 1 Schematic diagram Figure 1. SPIRIT1 circuit schematic AM17503v1 Figure 2. Oscillator circuit schematic D_VDD D_VDD C29 100nF 16V 100nF 16V SPI1_MOSI SPI1_MISO 2 2 SMD 0402 VCC /HOLD C /W D Q /S 6 5 2 SPI1_CLK 4 GND R2 7 100k 3 1 E2P_CS 2 1 1 C22 1 IC1 8 VBAT GND M95256-RMC6TG GND A_VDD GND 2 C21 1 VDD_A 16V 100nF C24 10V SMD 0402 1uF 1 2 SMD 0402 GND D_VDD U1 nRESET VDD_A User_Button_2 UART2 TX UART2 RX USER_LED_1 USER_LED_2 User_Button_1 IRQ3_SPIRIT1 D_VDD C23 IRQ1_SPIRIT1 1 1 C30 100nF 16V C31 4V 10uF BOOT0 2 IRQ2_SPIRIT1 IRQ0_SPIRIT1 SMD 0402 GND SWO D_VDD SWCLK VDD_2 SWDIO USBDP C28 16V USBDM SMD 0402 100nF E2P_CS SPI1_MOSI GND SPI1_MISO SPI1_CLK SPI1_CS 1 VDD_1 VDD_3 1 OSC_IN OSC_OUT 3 GND Y2 8MHz 2 VLCD Vdd3 PC13/WKUP2 Vss3 PB9 PC14/OCS32IN PC15/OCS32OUT PB8 PH0/OSCIN BOOT0 PB7/I2C1SDA PH1/OSCOUT NRST PB6/IC2C1SCL VssA PB5 PB4/JNTRST VddA PA0/WKUP1 PB3/JTDO PA1 PA15/JTDI PA2/UART2TX PA14/JTCK Vdd2 PA3/UART2RX Vss2 PA4/SPI1NSS PA5/SPI1SCK PA13/JTMS PA12/USBDP PA6/SPI1MISO PA7/SPI1MOSI PA11/USBDM PA10/UART1RX PB0/ADC12IN8 PB1/ADC12IN9 PA9/UART1TX PB2/BOOT1 PA8 PB10/I2C2SCL/UART3TX PB15/SPI2MOSI PB11/I2C2SDA/UART3RX PB14/SPI2MISO Vss1 PB13/SPI2SCK Vdd1 PB12/SPI2NSS/I2C2SMBA 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 2 1 SDN_SPIRIT1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 2 VBAT 16V 100nF STM32L151CBU6 EPAD D_VDD 2 1 SMD 0402 R19 GND 10k GND 2 SMD 0402 GND nRESET AM17504v1 Figure 3. SWD circuit schematic Boot BOOT0 R7 1 10k 2 SMD 0402 SMD 0402 1 1 PUSHBUTTON KMR221GLFS 100nF 401-1427-1-ND SMD 0402 C&K 16V 100nF 401-1427-1-ND SMD 0402 1 1 6 5 4 3 2 1 16V SMD 0402 2 D_VDD P1 C33 KMR221GLFS SWCLK SWO SWDIO 1 2 R14 nRESET 0 R15 Header 6 2 10k 2 2 Digikey JTAG User_Button_2 SW2 C32 R10 10k 2 2 User_Button_1 GND R9 10k 10k SMD 0402 PUSHBUTTON R12 D1 1 2 D2 680 1 2 1 USER_LED_2 R13 2 SMD 0402 RED LED Digikey 680 1 2 SMD 0402 ORANGE LED Digikey 751-1182-1-ND 751-1174-1-ND Vishay Vishay TLMS1100-GS08 TLMO1100-GS08 SMD 0603 AM17505v1 SMD 0603 Figure 4. USB circuit schematic USBA Male J1 USB_5V 1 2 3 4 DM DP 5 5 Digikey WM17118-ND Molex 048037-1000 VDD 1 USER_LED_1 R1 1k5 U3 2 C&K R6 10k SW1 Digikey D_VDD User_Button_2 2 User_Button_1 1 R5 D_VDD 1 1 D_VDD DP 1 2 DM 3 D1 D4 GND 3.3V D2 D3 6 USBDP 5 USB_5V 4 USBDM USBLC6-2P6 AM17506v1 Figure 5. Power management circuit schematic U4 LDS3985PU33R DFN6D exposed pad VDD D6 1 VIN VOUT 3 C25 U5 SMM4F50A 6 10V VINH NC C26 2.2uF 2 BAT46ZFILM 6.3V SMD 0402 1 1uF 2 2 USB_5V 4 GND 5 C27 33nF 25V 7 2 BYPASS GND7 1 SMD 0402 STmite flat (DO222-AA) 1 SMD 0402 GND A_VDD VDD D_VDD L14 10nF 1 2 0.6 Ohm 300 mA 0.6 Ohm 300 mA SMD 0402 SMD 0402 2 2 C34 50V L15 2 1 C35 10nF SMD 0402 50V 1 1 SMD 0402 GND GND AM17507v1