With the rapid development of mobile Internet in 2012, smart phones continue to develop rapidly under the impetus of manufacturers, operators and other parties. The hardware technology of smartphones has made a qualitative leap in the past year, and dual-core processors have become almost standard. In this area, the ARM architecture is very popular, occupying a monopoly position. In order to meet ARM, Intel has launched the low-power processor Atom, which is intended to compete with ARM on the mobile Internet.
Introduction to NFC
Near Field Communication (Near Field CommunicaTIon, referred to as NFC), also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows non-contact point-to-point data transmission between electronic devices, within ten centimeters (3.9 English Inches), exchange information.
This technology has evolved from contactless radio frequency identification (RFID) and is backward compatible with RFID. Due to the natural security of near field communication, NFC technology is considered to have great application prospects in mobile payment and other fields.
Chip structure diagram
NFC working mode
Card mode (Card emulaTIon): This mode is actually equivalent to an IC card using RFID technology. Can replace a large number of IC cards (including credit cards) in shopping malls, bus cards, access control, tickets, tickets and so on. In this way, there is a great advantage that the card is powered by the RF domain of the contactless card reader, even if the host device (such as a mobile phone) is not powered.
P2P mode: This mode is similar to infrared and can be used for data exchange, but the transmission distance is relatively short, the transmission establishment speed is much faster, the transmission speed is faster, and the power consumption is low (Bluetooth is also similar). Linking two NFC-capable devices enables point-to-point data transmission, such as downloading music, exchanging pictures, or synchronizing device address books. Therefore, through NFC, multiple devices such as digital cameras, PDAs, computers, and mobile phones can exchange information or services.
Reader / writer mode: Used as a contactless card reader, such as reading related information from posters or electronic labels on exhibition information.
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