When using the interface defined in the present document, the terminal shall connect, activate and deactivate the UICC through the contacts C1, C2, C3, C5, C7, in accordance with the operating procedures specified in ISO/IEC 7816-3 
The terminal may switch on and off the clock on contact CLK while the RST contact remains in state L.
For any voltage level, monitored during the activation sequence, or during the deactivation sequence following normal power-down, the order of the contact activation/deactivation shall be respected.
It is recommended that whenever possible, the deactivation sequence defined in ISO/IEC 7816-3 
should be followed by the terminal on all occasions when the terminal is powered down.
If the UICC clock is already stopped and is not restarted, the terminal may deactivate all the contacts in any order, provided that all signals reach low level before Vcc leaves high level. If the UICC clock is already stopped and is restarted before the deactivation sequence, then the deactivation sequence specified in ISO/IEC 7816-3 
shall be followed.
When Vpp is connected to Vcc, as allowed in the present document for terminals supporting class A operation conditions only, then Vpp shall be activated and deactivated with Vcc, at the time of the Vcc activation/deactivation, as specified in the sequences of ISO/IEC 7816-3 
The use of contacts C4 and C8 for the Inter-Chip USB interface is specified in ETSI TS 102 600 
The use of contact C6 for the UICC-CLF interface is specified in ETSI TS 102 613