RE: Interfacing FDC2214 EVM with Arduino

I am interfacing a FDC2214 EVM with an Arduino Uno and configuring it using register values. I have some preliminary code picked up from another forum post but I am not sure how to interpret some of the code. Here follows a snippet:

void writeConfig(byte FDC_addr, byte reg, byte MSB, byte LSB) {
    Wire.beginTransmission(FDC_addr);
    Wire.write(reg);
    Wire.write(MSB);
    Wire.write(LSB);
    Wire.endTransmission();
}

void Configuration(byte FDC_addr) {
    writeConfig(FDC_addr, 0x14, 0x20, 0x02);  //CLOCK_DIVIDERS_CH0
    writeConfig(FDC_addr, 0x1E, 0x7C, 0x00);  //DRIVE_CURRENT_CH0
    writeConfig(FDC_addr, 0x10, 0x00, 0x0A);  //SETTLECOUNT_CH0
    writeConfig(FDC_addr, 0x08, 0x83, 0x29);  //RCOUNT_CH0
    writeConfig(FDC_addr, 0x19, 0x38, 0x11);  //ERROR_CONFIG
    writeConfig(FDC_addr, 0x1B, 0xC2, 0x0D);  //MUX_CONFIG
    writeConfig(FDC_addr, 0x1A, 0x14, 0x01);   //CONFIG
}

I understand what the "FDC_addr" and "reg" are but I am curious as to what the MSB and LSB values stand for, that are being passed from the Arduino to the FDC2214. Any help is much appreciated.