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发表于 2016-4-26 14:05:07
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VPP Programming power input, optional use by the card
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 [11].
The UICC shall not require any programming voltage on Vpp. The terminal need not provide contact C6. If the terminal provides contact C6, then, in the case the terminal supports an ID-1 UICC under class A operating conditions only, the same voltage shall be supplied on Vpp as on Vcc, while in the case of Plug-in UICC/Mini-UICC the terminal need not provide any voltage on C6. Contact C6 may be connected to Vcc in any terminal supporting only class A operating conditions but shall not be connected to ground.
查了一下标准。应该不行直接接地。 |
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