smartcard pc cable pinout.

Description: Pinout of a smart card (SIM card) to PC adapter cable (SIM reader/writer) schematic and layout of a 6-pin SIM card special connector and a 9-pin D-SUB female connector used to connect computers to ISO 7816 compatible chip card systems (e.g., GSM mobile phones or pay-TV decoding systems).

The schematic for the SIM card to PC adapter cable is essential for establishing communication between a computer and ISO 7816 compliant smart cards, which are widely used in applications such as mobile telephony and digital television services. The layout involves two primary connectors: a 6-pin connector for the SIM card and a 9-pin D-SUB female connector that interfaces with the computer.

The 6-pin SIM card connector typically includes the following pin assignments:

1. **VCC** - The power supply pin that provides the necessary voltage to the SIM card.
2. **GND** - The ground connection, which serves as the reference point for the power supply.
3. **I/O** - The input/output pin used for data communication between the SIM card and the host device.
4. **RST** - The reset pin that initializes the SIM card.
5. **CLK** - The clock signal pin that synchronizes data transmission.
6. **VPP** - The programming voltage pin, which is used for specific operations during card programming.

The 9-pin D-SUB female connector connects to the computer and typically follows the standard RS-232 pinout configuration. The relevant pins include:

1. **Pin 1 (DCD)** - Data Carrier Detect.
2. **Pin 2 (RXD)** - Receive Data, which receives data from the SIM card.
3. **Pin 3 (TXD)** - Transmit Data, which sends data to the SIM card.
4. **Pin 4 (DTR)** - Data Terminal Ready, indicating that the device is ready to communicate.
5. **Pin 5 (GND)** - Ground connection for signal reference.
6. **Pin 6 (DSR)** - Data Set Ready, indicating that the SIM card is ready to communicate.
7. **Pin 7 (RTS)** - Request to Send, used to control data flow.
8. **Pin 8 (CTS)** - Clear to Send, indicating that the device can send data.
9. **Pin 9 (RI)** - Ring Indicator, used for signaling.

The connection between the SIM card and the computer allows for the reading and writing of data to the SIM card, enabling functionalities such as contact management, SMS operations, and application management. This schematic is crucial for developers and engineers working with smart card technology, ensuring proper interfacing and communication protocols are adhered to for reliable operation. Proper attention to the pin configuration and electrical characteristics is essential to prevent damage to the components and ensure optimal performance.Pinout of Smart card (Sim card) to PC adapter cable (sim reader/writer) schematic and layout of 6 pin Simcard special connector and 9 pin D-SUB female connectorused to to connect computers to ISO 7816 compatible chip card systems (e.g. GSM mobile phones or pay-TV decoding systems)..