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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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K32L2AX датащи(PDF) 90 Page - NXP Semiconductors |
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K32L2AX датащи(HTML) 90 Page - NXP Semiconductors |
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90 / 96 page  If the USB module is not used, leave the USB data pins (USB0_DP, USB0_DM) floating. • EMVSIM When using EMVSIM, a typical 4.7 KΩ pull up resistor should be added on the EMVSIM_IO pin. 5 5 4 4 3 3 2 2 1 1 D D C C B B A A EXTAL XTAL OSCILLATOR EXTAL XTAL OSCILLATOR EXTAL XTAL OSCILLATOR EXTAL XTAL OSCILLATOR EXTAL XTAL OSCILLATOR EXTAL XTAL OSCILLATOR MCU ADCx MCU ADCx MCU RESET_b MCU NMI_b MCU RESET_b Supervisor Chip OUT Active high, open drain Analog input High voltage input RESET_b VDD VDD VDD VDD Drawing Title: Size Document Number Rev Date: Sheet of Page Title: ICAP Classification: FCP: FIUO: PUBI: SCH-XXXXX PDF: SPF-XXXXX X <Title> C Friday, February 06, 2015 <PageTitle> 1 1 ___ ___ X Drawing Title: Size Document Number Rev Date: Sheet of Page Title: ICAP Classification: FCP: FIUO: PUBI: SCH-XXXXX PDF: SPF-XXXXX X <Title> C Friday, February 06, 2015 <PageTitle> 1 1 ___ ___ X Drawing Title: Size Document Number Rev Date: Sheet of Page Title: ICAP Classification: FCP: FIUO: PUBI: SCH-XXXXX PDF: SPF-XXXXX X <Title> C Friday, February 06, 2015 <PageTitle> 1 1 ___ ___ X R 1 2 0.1uF R5 1 2 Cx RESONATOR 1 3 Cy Cx CRYSTAL 2 1 Cy 10k R4 CRYSTAL 2 1 0.1uF CRYSTAL 2 1 R1 1 2 R3 1 2 C RESONATOR 1 3 R2 1 2 10k 10k RF 1 2 RS BAT54SW 1 2 RS RS C RF 1 2 RS 1 2 RF 1 2 CRYSTAL 2 1 P3V3 1 2 3 4 5 HDR TH 1X7 JP1 6 7 GND PTC14 PTC15 PTC16 PTC17 PTC18 EMVSIM_CLK R103 4.7K EMVSIM_RST EMVSIM_IO EMVSIM_VCCEN EMVSIM_PD EMVSIM HEADER Figure 32. EMVSIM interface • Pull up resistor for getting correct power consumption result Connect the pull up resistor to VDD_MCU for the pins like RESET and NMI. For other pull up resistor, do not use VDD_MCU. 9.1.5 Crystal oscillator When using an external crystal or ceramic resonator as the frequency reference for the MCU clock system, refer to the following table and diagrams. The feedback resistor, RF, is incorporated internally with the low power oscillators. An external feedback is required when using high gain (HGO=1) mode. In harsh EMC environment, it is recommended to use high gain mode. For low frequency (32 to 40 kHz), switching between high gain and low power is not supported. The series resistor, RS, is used to limit current to external crystal or resonator to avoid overdrive, and is required in high gain (HGO=1) mode when the crystal or resonator frequency is below 2 MHz. The low power oscillator (HGO=0) must not have any series resistor RS. Internal load capacitors (Cx, Cy) are provided in the low frequency (32.786kHz) mode. Use the SCxP bits in the SCG_SOSCCFG register to adjust the load capacitance for the crystal. Typically, values of 10 pf to 16 pF are sufficient for 32.768 kHz crystals that have a 12.5 pF CL specification. The internal load capacitor selection must not be used for high frequency crystals and resonators. See crystal or resonator manufacturer's recommendation for parameters about load capacitance and RF. Design considerations 90 K32 L2A Microcontroller with 512 KB Flash and 128 KB SRAM, Rev. 3, 02/2021 NXP Semiconductors |
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