NUC140LD2CN Nuvoton Technology Corporation of America, NUC140LD2CN Datasheet - Page 230

• Manufacturer Part Number: NUC140LD2CN
• Description: IC MCU 32BIT 64KB FLASH 48LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™ NUC100r

Specifications of NUC140LD2CN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: CAN, I²C, IrDA, LIN, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 31
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 8K 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: 48-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.7.4.7
5.7.4.8
The following procedure is recommended for starting a PWM drive.
Method 1:
Set 16-bit down counter (CNR) as 0, and monitor PDR (current value of 16-bit down-counter).
When PDR reaches to 0, disable PWM-Timer (CHxEN in PCR). (Recommended)
Method 2:
Set 16-bit down counter (CNR) as 0. When interrupt request happened, disable PWM-Timer
(CHxEN in PCR). (Recommended)
Method 3:
Disable PWM-Timer directly ((CHxEN in PCR). (Not recommended)
The reason why method 3 is not recommended is that disable CHxEN will immediately stop PWM
output signal and lead to change the duty of the PWM output, this may cause damage to the
control circuit of motor
1.
2.
3.
4.
5.
6.
7.
8.
PWM-Timer Start Procedure
PWM-Timer Stop Procedure
NuMicro™ NUC130/NUC140 Technical Reference Manual
Setup clock selector (CSR)
Setup prescaler (PPR)
Setup inverter on/off, dead zone generator on/off, auto-reload/one-shot mode and Stop
PWM-timer (PCR)
Setup comparator register (CMR) for setting PWM duty.
Setup PWM down-counter register (CNR) for setting PWM period.
Setup interrupt enable register (PIER)
Setup corresponding GPIO pins as PWM function (enable POE and disable CAPENR)
for the corresponding PWM channel.
Enable PWM timer start running (Set CHxEN = 1 in PCR)
- 230 -
Publication Release Date: June 14, 2011
Revision V2.01