![]() I2C (Inter-Integrated Circuit): Serial Data In and Serial Clock.Serial interfaces consist of 3 types each with their own pins: This makes connecting to an external processor (such as a microcontroller) easier. Serial interface LCD’s controllers require fewer connection pins than the parallel interface. For this reason, serial interface transmission can often be slower (but cheaper) than parallel transmission. The serial interface is a bi-directional data bus that transmits a series of 8-bits in parity, each with a set clock pulse width, and one at a time. These two interface modes will be explained in further detail below. In parallel mode the interface sends and receives 4 bits, 8 bits, or 16 bits of data at a time over multiple transmission lines. In serial interface the data is sent or received one bit at a time over a series of clock pulses. The main difference between the serial and parallel interfaces is how they transmit data. This is a brief guide summarizing the main points of each interface mode. You may be wondering which is the best interface for your project or what each of them consist of before deciding on your next LCD. Each interface type has their own advantages and disadvantages. Some LCD’s offer both interface modes while some are exclusively one type. There are two types of interface modes for LCD’s, serial and parallel. Understanding Parallel and Serial Interfaces ![]()
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