The STC12C5A60S2 microcontroller integrates a total of four 16-bit timers, two timers/counters compatible with the traditional 8051, 16-bit timers T0 and T1. There is no timer 2, but there is an independent baud rate generator for serial communication. Baud rate generator, coupled with 2-way PCA module, can realize 2 more 16-bit timers;
1. Basic features
The STC12C5A60S2 microcontroller integrates two 16-bit timer/counters.
1) Register
1.1) TMOD timer working mode control register, including 13-bit register, 16-bit register, 8-bit register, etc.;
1.2) TCON timer control register, mainly includes timer start control bits, etc.;
1.3) AUXR auxiliary register, used to set the frequency division; the default frequency division is 12
1.4) TH0/1: high 8-bit register of timer
1.5) TL0/1: lower 8-bit register of timer
Timer calculation
The STC12C5A60S2 series is a 1T 8051 microcontroller. In order to be compatible with the traditional 8051, timer 0 and timer 1 are reset to the speed of the traditional 8051, which is divided by 12. This is to be compatible with the traditional 8051. But it is also possible to achieve true 1T without dividing by 12.
Compile and download the target code, and the LED light flashes at 1s intervals, indicating that our code is correct. Now we modify the code to turn off the 12-frequency divider of timer T0, and the pink field is the newly added code.
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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