Вопрос по схеме с 2-мя симками Опции

[MVJ]

Думаю попробовать схему two SIM cards access.pdf http://microchip.ua/simcom/GSM-GPRS-GPS/SIM900/AppNotes , только переключение симок контроллером. Использовал ли кто данную схему? Как ведет себя CD4053 с симками разного типа?

[CADiLO]

По требованию ISO для SIM карт.

5.1.3 Classes of operating conditions
This document defines three classes of operating conditions, based on the nominal supply voltage provided to the card by the interface device through VCC.
⎯ 5 V for class A.
⎯ 3 V for class B.
⎯ 1,8 V for class C.
The card shall support one or more classes. If the interface device applies a class supported by the card, then
the card shall operate as specified.
⎯ If the card supports more than one class, those classes shall be consecutive.
⎯ If the interface device offers more than one class, the order in which those classes are applied is not
within the scope of this document.

No card shall be damaged when the interface device applies a class not supported by the card (by definition, a damaged card no longer operates as specified or contains corrupt data).


Она просто не должна отвечать не на своем питании.