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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) 88 Page - NXP Semiconductors |
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K32L2AX датащи(HTML) 88 Page - NXP Semiconductors |
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88 / 96 page  When an external supervisor chip is connected to the RESET_b pin, a series resistor must be used to avoid damaging the supervisor chip or the RESET_b pin, as shown in the following figure. The series resistor value (RS below) must be in the range of 100 Ω to 1 kΩ depending on the external reset chip drive strength. The supervisor chip must have an active high, open-drain output. 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 RESET_b SWD_DIO SWD_CLK Analog input High voltage input RESET_b VDD VDD 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 0.1uF RESONATOR 1 3 Cy Cx CRYSTAL 2 1 J1 HDR_5X2 1 2 3 4 6 5 7 8 9 10 Cy 10k 10k R4 CRYSTAL 2 1 0.1uF 10k 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 Figure 29. Reset signal connection to external reset chip • NMI pin Do not add a pull-down resistor or capacitor on the NMI_b pin, because a low level on this pin will trigger non-maskable interrupt. When this pin is enabled as the NMI function, an external pull-up resistor (10 kΩ) as shown in the following figure is recommended for robustness. If the NMI_b pin is used as an I/O pin, use the following two ways to disable NMI function: a. Define NMI interrupt handler in which NMI pin function is remapped to other pin mux function b. Disable NMI function by programming flash configuration byte at 0x40d for FOPT, change FOPT[NMI_DIS] bit to zero. It will not take effect until next reset. Design considerations 88 K32 L2A Microcontroller with 512 KB Flash and 128 KB SRAM, Rev. 3, 02/2021 NXP Semiconductors |
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