NUC120VE3AN Nuvoton Technology Corporation of America, NUC120VE3AN Datasheet - Page 289

• Manufacturer Part Number: NUC120VE3AN
• Description: IC MCU 32BIT 128KB FLASH 100LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™r

Specifications of NUC120VE3AN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, I²S, LVD, POR, PS2, PWM, WDT
• Number Of I /o: 76
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 8x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

5.7.4
5.7.4.1
The PWM period and duty control are configured by PWM down-counter register (CNR) and
PWM comparator register (CMR). The PWM-timer timing operation is shown in Figure 5-41. The
pulse width modulation follows the formula as below and the legend of PWM-Timer Comparator is
shown as Figure 5-40. Note that the corresponding GPIO pins must be configured as PWM
function (enable POE and disable CAPENR) for the corresponding PWM channel.
Note: [1] Unit = one PWM clock cycle.
Note: x= 0~3.
Function Description
PWM-Timer Operation
NuMicro™ NUC100 Series Technical Reference Manual
PWM frequency = PWMxy_CLK/(prescale+1)*(clock divider)/(CNR+1); where xy,
could be 01, 23, 45 or 67, depends on selected PWM channel.
Duty ratio = (CMR+1)/(CNR+1)
CMR >= CNR: PWM output is always high
CMR < CNR: PWM low width= (CNR-CMR) unit[1]; PWM high width = (CMR+1) unit
CMR = 0: PWM low width = (CNR) unit; PWM high width = 1 unit
Figure 5-40 Legend of Internal Comparator Output of PWM-Timer
- 289 -
Publication Release Date: Oct 22, 2010
Revision V1.06