Chipsea Technology CS8M320: Flexible, efficient, accurate and reliable TIMER configuration
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Chipsea Technology CS8M320: Flexible, efficient, accurate and reliable TIMER configuration

Posted Date: 2024-02-05

Nowadays, electronic products are pursuing more efficient, more accurate, safer and more reliable performance, and timer (Timer) configuration is undoubtedly the key to achieving these performance requirements. Chipsea Technology CS8M320 (referred to as M320) has become an ideal choice for many consumer electronics fields with its rich timer resource configuration, flexible PWM configuration, reliable braking function and practical input capture capabilities.

As an economical signal chain MCU, M320 not only integrates a variety of signal chain modules such as 12-bit fully differential ADC, low-temperature drift reference, and capacitance measurement module CVC, but also provides standard communication interfaces such as I2C and UART and PWM output to meet various needs. signal processing and communication needs.

Timer resources are rich

M320 has three timers: Timer0, Timer2, and Timer3. Each timer can select CPUCLK, MCK or WDTCLK as the clock source, and configure the clock frequency division independently. This design makes the M320 more handy when handling multitasking.

Among them, Timer2 supports external IO clock input, providing convenience for precise timing control.

Timer0 is mainly used as a system time base to provide a stable time base for the entire system. Timer2 has functions such as PWM control, buzzer output, braking and input capture, realizing one specialty and multiple functions. Timer3 goes a step further based on Timer2. In addition to buzzer output, it can also be configured with up to 10 IO ports to output PWM signals, and supports complementary mode and center-aligned mode to meet the needs of various complex applications.

Accurate PWM control

Through Timer2 and Timer3, M320 implements excellent PWM control function.

Timer2 outputs a 12bits wide PWM signal through PT3.3 or PT5.5 to accurately control each pulse. Timer3 can simultaneously output 3 channels of 8-bits bit width or 2 channels of 12-bits bit width, with the same period and independently configurable duty cycle PWM signals. It supports multiple output modes, and each PWM output can be carefully configured according to application requirements.

Specifically, each of the above PWM output ports can be turned on and off independently. The complementary mode output port also supports signal inversion configuration. In addition to high and low level complementary output, it can also realize synchronous PWM signal output. In addition, the complementary mode PWM is also equipped with an additional dead-time generator, the clock can be selected in the 1/2/4/8 frequency division method of MCK, and supports 3bits programmable dead-time setting.

Timer3 also supports up and down counting in 8-bit counting bit width mode, thereby achieving center alignment of different PWM channels. This feature performs well in brushless DC motor control, providing engineers with more precise control methods.

What’s even more surprising is that when the corresponding IO port is used as a PWM output, the M320 also supports the use of an external input interrupt function to monitor the rising/falling edges of the PWM signal. This feature is particularly useful when controlling electronic cigarette smoke, providing engineers with more room for innovation.

Buzzer, brake and input capture functions

Timer2 and Timer3 of M320 support buzzer output, providing users with convenient prompts and alarm functions, which can be implemented with simple configuration. Timer2 also has a braking function. When an abnormal signal is detected, the PWM output can be quickly cut off to ensure the safe and stable operation of the system.

At the same time, with the input capture function of Timer2, M320 can monitor the level changes of external signals in real time and capture high level, low level or level cycle time, providing a convenient means for signal measurement and fault diagnosis.

1. Buzzer output. Timer2 supports the direct output of 50% duty cycle square wave by PT5.0, and the first PWM of Timer3 supports the direct output of 50% duty cycle square wave by PT3.5, which can be directly applied to simple buzzer output.

2. Brake. Timer2 supports the braking function using the PT1.0 low level input as the trigger signal. When the brake is in effect, the PWM signal can be forced to output a high level or low level, which can be used for abnormality identification and avoidance.

3. Input capture. Timer2 can monitor the level characteristics of PT5.7 or its inverted signal, capture high level, low level or level cycle time, and can meet the needs of conventional signal measurement.

In short, M320 achieves greater performance with a smaller size, which is the embodiment of Chipsea's consistent design philosophy. This product can show its unique advantages in the fields of smart home, e-cigarette control, motor drive and other fields, and meet the needs of various complex applications. Choosing M320 means choosing efficiency, precision and reliability.

Currently, the M320 series products are on the market, offering QFN20 and SOP16 packages for users to choose from. Details are as follows:


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