1. Microcontroller: LPC1100XL
2. I2C Device: For example, an EEPROM
3. ADC Input: Example using a potentiometer or an analog sensor

• LPC1100XL
• Potentiometer

1. Connect the wiper of the potentiometer to an ADC capable pin (let's assume PIO0_11 for this example).

Markdown
Connect Potentiometer:Wiper to PIO0_11:Pin.
Connect Potentiometer:Vcc to VDD.
Connect Potentiometer:Gnd to VSS.

• Configure the ADC in firmware and read the value.

C
#include "LPC11xx.h"

void ADC_Init() {
    // Configuration code for ADC
    LPC_SYSCON->SYSAHBCLKCTRL |= (1<<13); /* Enable ADC clock */
    LPC_ADC->CR = (1 << 11) | (4 << 8); /* Select AD11 (PIO0_11) as ADC input and set clock divisor */
}

uint16_t ADC_Read() {
    LPC_ADC->CR |= (1<<24); /* Start conversion */
    while (!(LPC_ADC->GDR & (1<<31))); /* Wait for conversion to complete */
    return (LPC_ADC->GDR >> 6) & 0x3FF; /* Read the result (10-bit value) */
}

int main(void) {
    ADC_Init();
    while (1) {
        uint16_t value = ADC_Read();
        // Use the ADC value
    }
    return 0;
}

• LPC1100XL
• EEPROM (24LC256)

• Assuming PIO0_4 as SCL and PIO0_5 as SDA.

Markdown
Connect PIO0_4:Pin to EEPROM:SCL.
Connect PIO0_5:Pin to EEPROM:SDA.
Connect EEPROM:Vcc to VDD.
Connect EEPROM:Gnd to VSS.

• Configure I2C and communicate with EEPROM.

C
#include "LPC11xx.h"

#define I2CAddress 0x50 /* Example EEPROM I2C address */

void I2C_Init() {
    // Configuration code for I2C
    LPC_SYSCON->SYSAHBCLKCTRL |= (1<<5); /* Enable I2C clock */
    LPC_IOCON->PIO0_4 |= 1; /* Select I2C function for PIO0_4 */
    LPC_IOCON->PIO0_5 |= 1; /* Select I2C function for PIO0_5 */
    LPC_I2C->CONSET = 0x40; /* Enable I2C */
}

void I2C_Start() {
    LPC_I2C->CONSET = 0x20; /* Send START condition */
    while (!(LPC_I2C->CONSET & 0x08)); /* Wait for START to be sent */
    LPC_I2C->CONCLR = 0x20; /* Clear START flag */
}

void I2C_Write(uint8_t data) {
    LPC_I2C->DAT = data;
    LPC_I2C->CONSET = 0x04; /* Set ACK */
    while (!(LPC_I2C->CONSET & 0x08)); /* Wait for transmission to complete */
    LPC_I2C->CONCLR = 0x08; /* Clear transmission flag */
}

void I2C_Stop() {
    LPC_I2C->CONSET = 0x10; /* Send STOP condition */
}

int main(void) {
    I2C_Init();
    I2C_Start();
    I2C_Write(I2CAddress);
    I2C_Write(0x00); /* EEPROM memory address */
    I2C_Write(0xFF); /* Data to write */
    I2C_Stop();
    
    while (1) {
        // Main loop
    }
    return 0;
}

• Connect Potentiometer:Wiper to PIO0_11:Pin.
• Connect Potentiometer:Vcc to VDD.
• Connect Potentiometer:Gnd to VSS.

• Connect PIO0_4:Pin to EEPROM:SCL.
• Connect PIO0_5:Pin to EEPROM:SDA.
• Connect EEPROM:Vcc to VDD.
• Connect EEPROM:Gnd to VSS.