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PCI7621 データシート(PDF) 51 Page - Texas Instruments |
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PCI7621 データシート(HTML) 51 Page - Texas Instruments |
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51 / 298 page ![]() 2−25 Table 2−14. CardBus PC Card Interface Control Terminals (Continued) SKT A TERMINAL SKT B TERMINAL† DESCRIPTION I/O INPUT OUTPUT PU/ POWER NAME NO. NAME NO. DESCRIPTION I/O TYPE INPUT OUTPUT PU/ PD POWER RAIL A_CSTOP A09 B_CSTOP J17 CardBus stop. CSTOP is driven by a CardBus target to request the initiator to stop the current CardBus transaction. CSTOP is used for target disconnects, and is commonly asserted by target devices that do not support burst data transfers. I/O PCII4 PCIO4 PU3 VCCA/ VCCB A_CSTSCHG B02 B_CSTSCHG F14 CardBus status change. CSTSCHG alerts the system to a change in the card status, and is used as a wake-up mechanism. I PCII6 SW1 VCCA/ VCCB A_CTRDY A08 B_CTRDY H17 CardBus target ready. CTRDY indicates the ability of the CardBus target to complete the current data phase of the transaction. A data phase is completed on a rising edge of CCLK, when both CIRDY and CTRDY are asserted; until this time, wait states are inserted. I/O PCII1 PCIO1 PU5 VCCA/ VCCB A_CVS1 A_CVS2 A03 E08 B_CVS1 B_CVS2 C18 F19 CardBus voltage sense 1 and CardBus voltage sense 2. CVS1 and CVS2 are used in conjunction with CCD1 and CCD2 to identify card insertion and interrogate cards to determine the operating voltage and card type. I/O TTLI2 TTLO1 PU4 VCCA/ VCCB † These terminals are reserved for the PCI7611 and PCI7411 controllers. |
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