In this mini-project, a Texas Instrument board with an LM-35811 microcontroller is used to connect with a simplex printer establishing a serial communication. The printer and microcontroller are connected to drivers with DTR synchronization. General description: The microcontroller is using the UARTO, it is using the pin UOTX/PA1 for data transmission, and using pin 4 of port C for checking the printer status through the DTR signal. The hardware signal Data terminal Ready (DTR), is in Pin 4 on the DB9 connector. When: DTR = -5V Printer is busy DTR = +5V Printer is ready O The printer is using the regular buffer for receiving data from the microcontroller and using the DTR signal to indicate the printer status (busy or ready) Please read and understand the instructions and complete the following activities: Part III Timing Diagram and protocols (10 points) UOTX UORx St: babb, Parity Stop bze 3.3V ov PC4/DTR Stop Based on the following timing diagram, describe the protocol actions performed by the microcontroller and the printer. a) Describe what happened in the printer and microcontroller when PC4/DTR is low b) Describe what happened in the printer and microcontroller when PC4/DTR is high