The is a specific character LCD module designed for I2C communication, commonly used in Proteus simulations for embedded systems projects. While many standard 16x2 LCDs require a separate PCF8574 "backpack" module to communicate via I2C, the JHD2X16I2C
If the I2C debugger logs an address frame but receives a NACK (No Acknowledge), change your code initialization address from 0x27 to 0x3F or vice versa.
: Place two 4.7kΩ resistors on the schematic. Connect one from SCL to +5V (VCC), and the other from SDA to +5V (VCC).
对于学习和快速原型验证来说，JHD-2X16-I2C凭借其即拖即用的便利性和完整的I2C仿真支持，无疑是一个高效而实用的工具。尤其是在高校电子课程和线上仿真教学场景中，它帮助无数学生直观地理解了I2C总线协议和LCD显示的工作原理。但同时，开发者也需要清醒地认识到它的设计局限——只支持I2C写命令意味着代码必须全部采用延时等待而非忙标志检测机制；而0x7C的特殊地址意味着在仿真结束后向硬件实物移植时，代码需要进行相应的适配和修改。 jhd2x16i2c proteus exclusive
Microcontroller Pull-Ups JHD2X16I2C Sub-Circuit +-------------------+ + +5V +--------------------------+ | | | | | PCF8574 Expander | | SDA (Pin) |----------+------X--|--[ 4.7k ] | [SDA] [P0]--+--> RS | SCL (Pin) |----+-----|------X-----[ 4.7k ] | [SCL] [P1]--+--> RW | | | | | [P2]--+--> E +-------------------+ | | | [P4]--+--> D4 | | | [P5]--+--> D5 | | | [P6]--+--> D6 | | | [P7]--+--> D7 | | +--------------------------+ | | | +-----|----------------------------------------+ +----------------------------------------+ Microcontroller to PCF8574 Connections
The internal hardwiring of a standard JHD2X16I2C module follows this specific mapping, which must be replicated in your Proteus schematic: PCF8574 Pin Register Select P1 Read/Write (Often grounded on hardware, but connected here) P2 Enable Pin P3 LED / Backlight Controls the LCD backlight transistor P4 Data Bit 4 (4-bit mode communication) P5 Data Bit 5 P6 Data Bit 6 P7 Data Bit 7 Microcontroller to PCF8574 (I2C Bus) Connections
By using the correct .lib file and ensuring the I2C address matches the simulation component, you can successfully simulate the JHD2X16I2C. The is a specific character LCD module designed
The I2C bus is a synchronous, multi-master, multi-slave, packet-switched, single-ended, serial communication bus invented by Philips Semiconductor (now NXP). Its main advantage is simplicity: it requires only two bidirectional lines to connect multiple devices:
A 8-bit remote I/O expander chip. It receives serial data via the I2C bus and converts it into parallel outputs. These parallel pins drive the data lines ( D4cap D sub 4 D7cap D sub 7 ) and control lines ( RScap R cap S RWcap R cap W ) of the HD44780 driver. Pin Configuration
Which family are you targeting? (e.g., PIC, AVR, STM32, or 8051) Connect one from SCL to +5V (VCC), and
这些属性参数直接定义了该元件的仿真行为特征，尤其是 这一项，是后续代码编写中最关键的配置依据。不少用户正是因为混淆了LCD I2C适配器常用的0x27/0x3F地址与JHD-2X16-I2C的0x7C地址，导致仿真失败。
Click on the button and press P to open the Pick Devices dialog.
Grounding all three pins ( 000 ) assigns the baseline address.