STC15F development board

Product information: STC15F2K60S2 series microcontroller is a single clock/machine cycle (1T) microcontroller produced by Hongjing Technology. It is a new generation of 8051 microcontroller with high speed/low power consumption/super anti-interference. The instruction code is fully compatible with traditional 8051, but it is fast. 7-12 times. Internally integrated MAX810 dedicated reset circuit, 2-channel PWM, 8-channel high-speed 10-bit A/D conversion (250K/S), for motor control, strong interference situations STC15F2K60S2 is an 8051 series microcontroller. Compared with ordinary 51 microcontrollers, it has the following characteristics:

Large capacity 2048 bytes on-chip RAM data memory

High speed: 1 clock/machine cycle, enhanced 8051 core (STC Y5), 7 to 12 times faster than traditional 8051

The speed is also 20% faster than STC’s early 1T series microcontrollers (such as STC12/11/10 series)

Wide voltage: 5.5～3.8V, 2.4～3.6V (STC15L2K60S2 series)

Low-power design: low-speed mode, idle mode, power-down mode (can be woken up by external interrupt or internal power-down wake-up timer)

Internal high-precision R/C clock, ±1% temperature drift (-40℃~+85℃), 5‰ at room temperature, completely eliminating the need for expensive external crystal clocks, the internal clock is optional from 5MHz~35MHz

Internal high-reliability reset, 8-level reset threshold voltage is optional during ISP programming, completely eliminating the need for external reset circuits

Resources that support power-down wake-up include: INT0/INT1 (both rising edge/falling edge interrupts are acceptable), -INT2/-INT3/-INT4 (falling edge interrupts); CCP0/CCP1/CCP2/RxD/RxD2/T0/T1/ T2 pin; internal power-down wake-up dedicated timer

Working frequency: 5～35MHz, equivalent to ordinary 8051: 60～420MHz

8/16/24/32/40/48/56/60/61K bytes on-chip Flash program memory, erased and written more than 100,000 times

Large-capacity on-chip EEPROM (FLASH) function, more than 100,000 times of erasing and writing

ISP/IAP (In-System Programmable/In-Application Programmable), no programmer/emulator required

High-speed ADC, 8-channel 10-bit, speed up to 300,000 times/second. 3-way PWM can also be used as 3-way D/A

3-channel capture/compare unit (CCP/PCA/PWM)----can also be used to implement 3 channels of D/A, 3 timers or 3 external interrupts (supports rising edge/falling edge interrupts)

6 timers, 2 16-bit reloadable timers T0 and T1 are compatible with ordinary 8051 timers, a 16-bit timer T2 is added, and can realize clock output, 3-channel CCP/PCA can realize 3 more timers

Programmable clock output function (clock division output for internal system clock or clock input from external pin):

① T0 outputs the clock at P3.5;

② T1 outputs the clock at P3.4;

③ T2 outputs the clock at P3.0. The above three timer/counter output clocks can be divided into 1~65536 levels for output;

④ The internal main clock is at P5.4/MCLKO and the external clock is output (the main clock of the STC15 series 8-pin microcontroller is at P3.4/MCLKO and the external clock is output)

Hardware watchdog (WDT)

SPI high-speed synchronous serial communication interface

Dual serial port/UART, two completely independent high-speed asynchronous serial communication ports, time-sharing switching can be used as 5 sets of serial ports

Advanced instruction set structure, compatible with ordinary 8051 instruction set, with hardware multiplication/division instructions

General I/O ports (42/38/30/26), after reset: quasi-bidirectional port/weak pull-up (8051 traditional I/O port)

Four modes can be set: quasi-bidirectional port/weak pull-up, strong push-pull/strong pull-up, input only/high impedance and open drain

The driving capability of each I/O port can reach 20mA, but the maximum of the entire chip should not exceed 120mA.

If the I/O ports are not enough, you can use 3 ordinary I/O port cables to connect to an external 74HC595 (￥0.21 yuan) to expand the I/O ports, and multiple chips can be cascaded to expand dozens of I/O ports. You can also use A/ Use key scanning to save I/O ports

The features of this core board are as follows:

1. Use STC15F2K60S2-28I industrial-grade chip;

2. A power indicator LED light;

3. A reset button;

4. Onboard 3.3V voltage regulator chip;

5. Reserve an external crystal oscillator in the form of a socket: the crystal oscillator can be easily replaced;

6. Reserve RXD, TXD, GND, and 5V pins (the core board can be powered through the USBTTL module, download programs, etc.);

7. Use a power switch to facilitate power-off operation of the core board;

8. Reserve 5V, 3.3V pin header input/output interfaces