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VCC is only enabled when the power supply bits of [[CONFIG9_Registers#CFG9_CARDSTATUS|CFG9_CARDSTATUS]] are set to <tt>10</tt>. This is in contrast to the DS and DSi, where the power supply is always available when the console is on.
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{| class="wikitable" border="1"
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|-
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!
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! 3DS
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! DS and DSi
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|-
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| VCC
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| Only enabled when the power supply bits of [[CONFIG9_Registers#CFG9_CARDSTATUS|CFG9_CARDSTATUS]] are set to <tt>10</tt>
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| Always available when card is detected
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|-
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| Card-detect
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| Physical insertion switch, readable through [[CONFIG9_Registers#CFG9_CARDSTATUS|CFG9_CARDSTATUS]] bit 0
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| IRQ pin
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|-
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| Time to first clock pulse
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| ~280ms
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| ~166ms
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|}
===SPI flash===
===SPI flash===