A SIM card is a chip with a microprocessor that has five modules, each corresponding to a function: CPU(8-bit), program memory ROM(6-16kbit), working memory RAM(128-256kbit), data memory EEPROM(2-8kbit) and serial communication unit, these five modules are integrated in an integrated circuit. The SIM card needs at least 5 cables to connect to the mobile phone: * Power supply (Vcc) * Clock (CLK) * Data I\/Q port (Data) * Reset (RST) * Ground terminal (GND)
A SIM card is a chip with a microprocessor that has five modules, each corresponding to a function: CPU(8-bit), program memory ROM(6-16kbit), working memory RAM(128-256kbit), data memory EEPROM(2-8kbit) and serial communication unit, these five modules are integrated in an integrated circuit. The SIM card needs at least 5 cables to connect to the mobile phone: * Power supply (Vcc) * Clock (CLK) * Data I\/Q port (Data) * Reset (RST) * Ground terminal (GND)