NUC120LE3AN Nuvoton Technology Corporation of America, NUC120LE3AN Datasheet - Page 294
NUC120LE3AN
Manufacturer Part Number
NUC120LE3AN
Description
IC MCU 32BIT 128KB FLASH 48LQFP
Manufacturer
Nuvoton Technology Corporation of America
Series
NuMicro™r
Specifications of NUC120LE3AN
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
31
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
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Company:
Part Number:
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Manufacturer:
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Quantity:
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Part Number:
NUC120LE3AN
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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
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)
NuMicro™ NUC100 Series Technical Reference Manual
- 294 -
Publication Release Date: Dec. 22, 2010
Revision V1.06
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