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Häufig gestellte Fragen / What is band-gap voltage?
https://www.nuvoton.com.cn/support/technical-support/faq/d4e4dff8-04f1-11ea-b113-05daf7eedf03/
What is band-gap voltage? 1427851680000 A band-gap internal voltage reference is an external voltage independent voltage reference circuit widely used in integrated circuits. Part Number Band-gap Voltage typical vale MINI51 Series 1. 24 V M051 Series 1.2 0 V NUC1 00/120 Series 1.2 0 V NUC130/140 Series 1.26V NUC230/240 Series 1.25V NUC131 Series 1.25V M0518 Series 1,25V NUC442/472 Series 1.25V M451 Series 1.25V The NANO series can use internal reference voltage 1.8V or 2.5V as band-gap voltage.
Häufig gestellte Fragen / What is the pull-up resistor value for I2C bus?
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What is the pull-up resistor value for I2C bus? 1429753560000 For the standard-mode I2C-bus system, the resistor value Rp in the figure above is determined by the following parameters: I2C speed; Supply voltage; Bus capacitance; The number of connected devices (input current + leakage current). The supply voltage (VDD) and the maximum output LOW level determine the minimum value of pull-up resistor Rp. For example, a supply voltage of 4.5V, VOL= 0.4 V and Rp is 4.7 kΩ. ( 4.5 - 0.45 ) / 4700 = 8.617 mA < Sink current. The maximum bus capacitance of the value Rp limits is approximately 400 pf (capacitive load), calculated by cut-off frequency (1/2 * pi * Rp * Cb), to meet the requirement that the maximum tr (SCL/SDA rising time) is 300 ns.
Häufig gestellte Fragen / What needs to be noted when using GPIO interrupt wake-up?
https://www.nuvoton.com.cn/support/technical-support/faq/d4f92b54-04f1-11ea-b113-05daf7eedf03/
What needs to be noted when using GPIO interrupt wake-up? 1427852760000 The user must confirm I/O state based on the pre-determined trigger condition before entering Idle or Power-down mode. For example, if the interrupt trigger condition is rising-edge or high level, the user must confirm if the I/O state before entering Idle or Power-down mode is low level. Conversely, if the interrupt trigger condition is falling-edge or low level, the user must confirm if the I/O state before entering Idle or Power-down mode is high level.
Häufig gestellte Fragen / What real-time operating systems (RTOS) do NuMicro™ Cortex-M series chips support?
https://www.nuvoton.com.cn/support/technical-support/faq/d4fde647-04f1-11ea-b113-05daf7eedf03/
What real-time operating systems (RTOS) do NuMicro™ Cortex-M series chips support? 1427853480000 The real-time operating systems supported by the NuMicro™ Cortex-M series include FreeRTOS, uC/OS-II, Keil RTX and IAR PowerPAC RTOS.
Häufig gestellte Fragen / What interfaces does In System Programming (ISP) tool support for system upgrades?
https://www.nuvoton.com.cn/support/technical-support/faq/d502a13a-04f1-11ea-b113-05daf7eedf03/
What interfaces does In System Programming (ISP) tool support for system upgrades? 1427853480000 The ISP tool supports many interfaces for system upgrades, including UART, USB, I2C, SPI, CAN, RS485, I/O and Ethernet, and provides open source code for users to modify to conform to their own system environment.
Häufig gestellte Fragen / What needs to be considered when switching clock sources?
https://www.nuvoton.com.cn/support/technical-support/faq/d5075c2d-04f1-11ea-b113-05daf7eedf03/
What needs to be considered when switching clock sources? 1427879700000 Before clock switching, both the pre-selected and newly selected clock sources must be stable. The pre-selected clock source can be turned off after the switching is complete. The register CLKSTATUS maintains the state of each clock source. User may read the CLKSTATUS value to determine if the clock source is stable.
Häufig gestellte Fragen / Why are the paired PWM output frequency impacted each other when setting two independent PWM outputs with the BSP driver library provided by Nuvoton?
https://www.nuvoton.com.cn/support/technical-support/faq/d50f7280-04f1-11ea-b113-05daf7eedf03/
PWM Pre-scale Why are the paired PWM output frequency impacted each other when setting two independent PWM outputs with the BSP driver library provided by Nuvoton? 1429780680000 This is because the paired PWM output PWM01(PWM23, PWM45) uses the same 8-bit pre-scale. Setting one of the paired PWM output using the driver library will impact the other PWM output frequency . The other paired PWM will be needed if the user wants to use the driver library to generate PWM output with a different frequency.
Häufig gestellte Fragen / What are included in the Flash memory of the NuMirco™ series chips?
https://www.nuvoton.com.cn/support/technical-support/faq/d5142d73-04f1-11ea-b113-05daf7eedf03/
What are included in the Flash memory of the NuMirco™ series chips? 1429780680000 The Flash memory in the NuMirco™ series chips at least includes four independent blocks: APROM: Stores user application program code; LDROM: Stores Nuvoton’s ISP code or user update code; Data Flash: It is an independent block which stores application dependent data, and reserves the data after powered off; User Configuration: Provides control related settings, such as Flash security lock, boot select, Data Flash base address and brown-out voltage level, and is loaded from flash memory to its corresponding control registers during chip powered on. The Flash memory organization of the NUC100 series is as follows:
Häufig gestellte Fragen / What are the Dead Zone generator of PWM and its features?
https://www.nuvoton.com.cn/support/technical-support/faq/d51da359-04f1-11ea-b113-05daf7eedf03/
PWM complementary pair; Dead Zone What are the Dead Zone generator of PWM and its features? 1429776060000 The Dead Zone generator of PWM is used for MOSFET protection, especially for the motor driver system to avoid both of the top and bottom MOSFET to be turned on simultaneously.
Häufig gestellte Fragen / Does the PWM generator support the entire output signal to be high level or low level?
https://www.nuvoton.com.cn/support/technical-support/faq/d5225e4c-04f1-11ea-b113-05daf7eedf03/
PWM duty Does the PWM generator support the entire output signal to be high level or low level? 1432713960000 Depending on the NuMicro™ series, the PWM generator in some chips must have at least one count for high level or low level pulse width within the cycle of the entire PWM output waveform. The NUC131, M0518 and M451 series support the entire output signal to be high level or low level.
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