TV screen display Insert smart card indicates that the smart card of the TV set-top box is not inserted or is overdue, so that the TV screen is displayed in this way.
Smart Card: A plastic card (usually the size of a credit card) with an embedded microchip. Some smart cards contain an RFID chip, so they do not require any physical contact with a reader to identify the cardholder. Smart cards are equipped with CPU and RAM, and can process a large amount of data without interfering with the work of the host CPU. Smart cards can also filter out incorrect data to reduce the burden on the host CPU. It is suitable for applications where the number of ports is large and the communication speed is fast. The integrated circuit in the card includes the central processor CPU, programmable read-only memory EEPROM, random access memory RAM, and the in-card Operating System COS(Chip Operating System) solidified in the ROM. The data in the card is divided into external reading and internal processing.