NUC140LD2CN Nuvoton Technology Corporation of America, NUC140LD2CN Datasheet - Page 226

• 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

5.7.4.2
PWM Timers have double buffering function the reload value is updated at the start of next period
without affecting current timer operation. The PWM counter value can be written into CNRx and
current PWM counter value can be read from PDRx.
The bit CH0MOD in PWM Control Register (PCR) defines PWM0 operates in auto-reload or one-
shot mode If CH0MOD is set to one, the auto-reload operation loads CNR0 to PWM counter when
PWM counter reaches zero. If CNR0 are set to zero, PWM counter will be halt when PWM
counter counts to zero. If CH0MOD is set as zero, counter will be stopped immediately.
PWM1~PWM7 performs the same function as PWM0.
down-counter
PWM-Timer
Comparator
write a nonzero number to
prescaler & setup clock
dividor
Waveform
output
(CMR)
PWM
PWM
PWM Double Buffering, Auto-reload and One-shot Operation
NuMicro™ NUC130/NUC140 Technical Reference Manual
(Write initial setting)
Auto reload = 1
(CHxMOD=1)
CMR = 1
CNR = 3
(PWM-Timer starts running)
CNR=150
CMR=50
Write
3
1
Set ChxEN=1
Start
Figure 5-43 PWM Double Buffering Illustration
Figure 5-42 PWM-Timer Operation Timing
3
CNR=199
CMR=49
Write
151
2
(S/W write new value)
1
51
1
- 226 -
CMR = 0
CNR = 4
(PWMIFx is set by H/W)
0
(H/W update value)
CNR=99
Auto-load
CMR=0
Write
Publication Release Date: June 14, 2011
4
200
3
50
2
0
CMR=XX
CNR=0
Write
1
100
Revision V2.01
(PWMIFx is set by H/W)
1
Stop
0
Auto-load
4