IDEAS

Serialisation has become the order of data communication in these days. It seems like that parallel transfer is in oblivion. Nowadays, whatever new method of data transfer is introduced, it seems to work using various pairs of serial data lines in one or other form. Some of the best examples are USB, HDMI, Firewire (ieee 1394),PCIe, SATA, Ethernet, MIPI interfaces (DSI, CSI) etc.. During the old days it was considered parallel transfer could give more throughput. To some extent it was true. A parallel transfer could take a complete byte, word or quad word at a single clock to the receiving device, whereas a bit could only be transferd at a single clock edge in  a serial line. From old days itself serial transfer co-existed in form of USART, UART, SPI, I2C etc, but was limited to very small clock rates for small speed peripherals. By then, parallel method dominated for chip to chip and box transfers like ISA, SCSI, PCI, PATA IDE etc. But as clock rates increased , some problems wi