The following 17 kinds microcontroller sharing common circuit design module, comprising: a two-way communication circuit 232 connected to 3-wire mode, the transistor serial communication, one-way communication circuit 232, USB switch circuit 232 and the like.
1, two-way communication circuit 232 connected to 3-wire mode, corresponding to the female, the working voltage of 5V, may be used MAX202 or MAX232.
2, serial communication triode
This circuit is used to take the transistor, the circuit is simple, low cost, but the problem, generally at a low baud rate is very good.
3, one-way communication circuit 232
Three-wire, three tubes above the ride completely equivalent.
4, USB switch circuit 232
It uses PL2303HX, cheap, good stability.
5, SP706S reset circuit
With watchdog and manual reset, cheap (much more expensive Maxim), R4 is debugging, debugging after welding good R4.
. 6, the SD card circuit module (lock) of the present circuit and the SD card on package, the package corresponding to the note. This circuit may be controlled via port SD card power, more perfect, it may be used to 5V and 3.3V. Note, however, use some devices, 5V and 3.3 are not the same.
7, LCM12864 liquid crystal module (the ST7920) this circuit is a common circuit 12864, cheap, Chinese font. It may set its operating mode or in parallel mode through the serial port PSB level, with backlight control function.
8, LCD1602 character LCD module (KS0066) most commonly used character LCD module, and can only display numeric characters, or may be four 8-bit control, with backlight.
9, full duplex RS485 circuit (a protective function) with a protection function, the full duplex mode of communication lines 4, suitable for long distance communication.
10, RS485 half duplex communication module
By selecting the transport direction of the port selection data, with the power protection. This module can only work in 5V.
11, ARM JTAG emulation interface circuit
More perfect, it can be applied in a conventional ARM chip, with automatic download feature, you can use JLINK or ULINK.
12,5V power module of this circuit is relatively simple, if a line can reach 1.5A, if the patch may reach 1A.
13,3.3 power module may reach 800mA, the price is very cheap, but also corresponding chip 1.8 / 1.2 can be directly replaced.
14, the most commonly used switching power supply
15, DS1302 digital clock a clock circuit very popular, convenient, and low cost.
16, AT24C02 (EEPROM) EEPROM most commonly used circuit.
17, the buzzer drive circuit is simple not say more.
Is achieved by Z-stack Stack serial passthrough
http://www.makeru.com.cn/live/1758_330.html?s=45051
(STM32 DC motor drives)
http://www.makeru.com.cn/live/1392_1218.html?s=45051
Communication protocols - UART serial port protocol
http://www.makeru.com.cn/live/3576_1437.html?s=45051
(Stm32 serial application)
http://www.makeru.com.cn/live/1392_1164.html?s=45051