Search found 207 matches

by a_ziliu
27 Mar 2017, 13:49
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: Why are the paired PWM output frequency impacted each other when setting two independent PWM outputs with the BSP driver
Replies: 0
Views: 1589

Why are the paired PWM output frequency impacted each other when setting two independent PWM outputs with the BSP driver

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 w...
by a_ziliu
27 Mar 2017, 13:48
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: What needs to be considered when switching clock sources?
Replies: 0
Views: 1705

What needs to be considered when switching clock sources?

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...
by a_ziliu
27 Mar 2017, 13:48
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: What interfaces does In System Programming (ISP) tool support for system upgrades?
Replies: 0
Views: 1734

What interfaces does In System Programming (ISP) tool support for system upgrades?

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.
by a_ziliu
27 Mar 2017, 13:47
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: What real-time operating systems (RTOS) do NuMicro? Cortex-M series chips support?
Replies: 0
Views: 1789

What real-time operating systems (RTOS) do NuMicro? Cortex-M series chips support?

The real-time operating systems supported by the NuMicro? Cortex-M series include FreeRTOS, uC/OS-II, Keil RTX and IAR PowerPAC RTOS.
by a_ziliu
27 Mar 2017, 13:47
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: What needs to be noted when using GPIO interrupt wake-up?
Replies: 0
Views: 1575

What needs to be noted when using GPIO interrupt wake-up?

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...
by a_ziliu
27 Mar 2017, 13:47
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: What is the pull-up resistor value for I2C bus?
Replies: 0
Views: 1686

What is the pull-up resistor value for I2C bus?

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 determin...
by a_ziliu
27 Mar 2017, 13:46
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: Is I2S able to handle 24-bit data?
Replies: 0
Views: 1650

Is I2S able to handle 24-bit data?

Yes, the I2S controller consists of I2S protocol interface with external Audio CODEC. Two 8-word deep FIFO for reading and writing path respectively are capable of handling 8, 16, 24, 32 bit word sizes.
by a_ziliu
27 Mar 2017, 13:46
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: What is band-gap voltage?
Replies: 0
Views: 1828

What is band-gap voltage?

A band-gap internal voltage reference is an external voltage independent voltage reference circuit widely used in integrated circuits.

The NANO series can use internal reference voltage 1.8V or 2.5V as band-gap voltage.
by a_ziliu
27 Mar 2017, 13:43
Forum: Nuvoton Cortex-M0/M23 MCU
Topic: How to handle I2C bus hang-up in slave mode?
Replies: 0
Views: 1707

How to handle I2C bus hang-up in slave mode?

The I?C controller provides a 14-bit time-out counter to handle I2C bus hang-up. If the I2C bus is hung up, it causes I2CSTATUS and the flag SI not updated for a period, and the 14-bit time-out counter may overflow and acknowledge CPU the I2C interrupt. Refer to the following figure for the 14-bit t...