MC8630 Module
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junction capacitance is smaller than 3P. VBUS might not connect with VBUS at external host end, but connect
directly with the module’s VMAIN. The USB recommended voltage is: 3.0—5.6V, typical 5V.
Figure 4-2 USB 2.0 Interface
MC8630 module’s UBS power reference design:
V_MAIN output voltage is adjusted by feedback resistance. Neither perform serial connection with any
resistance or inductor, nor parallel connect with any capacitance. It’s advised to design V_MAIN output as
typical voltage 3.6V. See figure 4-3.
Figure 4-3 MC8630 Module USB Power Design Diagram
4.5 UIM Card Interface
Three kinds of work voltage ClassA-5V
±
10%, ClassB-3V
±
10%, ClassC-1.8V
±
10% are specified in UICC
standard. UIM card at least supports continuous two kinds of voltage: Class A/B or Class B/C. China
Telecom’s clear requirements upon the terminal: The terminal should support Class B/C, and ClassB-3V
±
10%,
ClassC-1.8V
±
10%, and should comply with the Power-on time sequence specified in ISO 7816. UIM_VPP
should be hang up, and applied for 5V.
MC8630 module supports UIM card, which includes 4 pins at the end. V_CARD is used to power UIM card.
It’s strongly recommended to add ESD protection component when designing UIM circuit. See ESD protection
component D2 in figure 4-4.
