8237-1006 WOODWARD 伍德沃德 直接连接到微控制器

8237-1006 WOODWARD 伍德沃德 直接连接到微控制器

8237-1006 WOODWARD如电路图所示，按钮或薄膜按钮相对于地或PA4直接连接到微控制器的引脚PA2(登记键1)、PA3(删除键2)、PA0(向上键3)、PA1(向下键4)。

并且LED通过1k电阻器相对于地连接在微控制器的管脚PC2处。指纹模块的Rx和Tx直接连接到微控制器的串行引脚PD1和PD3。5v电源用于通过以下方式为整个电路供电LM7805电压调节器它由12v直流适配器供电。

蜂鸣器也连接在PC3引脚上。在中配置了一个16x2的LCD4位模式其RS、RW、EN、D4、D5、D6和D7直接连接在微控制器的引脚PB0、PB1、PB2、PB4、PB5、PB6、PB7上。RTC模块连接在I2Cpin PC0 SCL和PC1 SDA上。PD7用作获取当前时间的软UART Tx引脚。

8237-1006 WOODWARD As shown in the circuit diagram, the button or film button is connected directly to the microcontroller pins PA2(register key 1), PA3(Delete key 2), PA0(up key 3), PA1(down key 4) in relation to ground or PA4.

And the LED is connected to the pin PC2 of the microcontroller relative to ground through a 1k resistor. The Rx and Tx of the fingerprint module are connected directly to the serial pins PD1 and PD3 of the microcontroller. The 5v power supply is used to power the entire circuit by the following LM7805 voltage regulator It is powered by a 12v DC adapter.

The buzzer is also attached to the PC3 pin. A 16x2 LCD4 bit mode is configured with RS, RW, EN, D4, D5, D6 and D7 directly connected to the microcontroller pins PB0, PB1, PB2, PB4, PB5, PB6 and PB7. The RTC module is connected to the I2Cpin PC0 SCL and PC1 SDA. PD7 is used as a soft UART Tx pin to get the current time.