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PCI7620 Datasheet(PDF) 53 Page - Texas Instruments |
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PCI7620 Datasheet(HTML) 53 Page - Texas Instruments |
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53 / 248 page  3–8 Table 3–2. PC Card—Card Detect and Voltage Sense Connections CD2//CCD2 CD1//CCD1 VS2//CVS2 VS1//CVS1 Key Interface VCC VPP/VCORE Ground Ground Open Open 5 V 16-bit PC Card 5 V Per CIS (VPP) Ground Ground Open Ground 5 V 16-bit PC Card 5 V and 3.3 V Per CIS (VPP) Ground Ground Ground Ground 5 V 16-bit PC Card 5 V, 3.3 V, and X.X V Per CIS (VPP) Ground Ground Open Ground LV 16-bit PC Card 3.3 V Per CIS (VPP) Ground Connect to CVS1 Open Connect to CCD1 LV CardBus PC Card 3.3 V Per CIS (VPP) Ground Ground Ground Ground LV 16-bit PC Card 3.3 V and X.X V Per CIS (VPP) Connect to CVS2 Ground Connect to CCD2 Ground LV CardBus PC Card 3.3 V and X.X V Per CIS (VPP) Connect to CVS1 Ground Ground Connect to CCD2 LV CardBus PC Card 3.3 V, X.X V, and Y.Y V Per CIS (VPP) Ground Ground Ground Open LV 16-bit PC Card X.X V Per CIS (VPP) Connect to CVS2 Ground Connect to CCD2 Open LV CardBus PC Card 3.3 V 1.8 V (VCORE) Ground Connect to CVS2 Connect to CCD1 Open LV CardBus PC Card X.X V and Y.Y V Per CIS (VPP) Connect to CVS1 Ground Open Connect to CCD2 LV CardBus PC Card Y.Y V Per CIS (VPP) Ground Connect to CVS1 Ground Connect to CCD1 LV UltraMedia Per query terminals Ground Connect to CVS2 Connect to CCD1 Ground Reserved Reserved 3.6.4 Flash Media Card Detection The PCI7x20 device detects an MMC/SD card insertion through the MC_CD_0 terminal. When this terminal is 0, an MMC/SD card is inserted in the socket. The PCI7x20 device debounces the MC_CD_0 signal such that instability of the signal does not cause false card insertions. The debounce time is approximately 50 ms. The MC_CD_0 signal is not debounced on card removals. The filtered MC_CD_0 signal is used in the MMC/SD card detection and power control logic. The MMC/SD card detection and power control logic contains three main states: • Socket empty, power off • Card inserted, power off • Card inserted, power on The PCI7x20 device detects a Memory Stick card insertion through the MC_CD_1 terminal. When this terminal is 0, a Memory Stick card is inserted in the socket. The PCI7x20 device debounces the MC_CD_1 signal such that instability of the signal does not cause false card insertions. The debounce time is approximately 50 ms. The MC_CD_1 signal is not debounced on card removals. The filtered MC_CD_1 signal is used in the Memory Stick card detection and power control logic. The Memory Stick card detection and power control logic contains three main states: • Socket empty, power off • Card inserted, power off • Card inserted, power on 3.6.5 Power Switch Interface The power switch interface of the PCI7x20 device is a 3-pin serial interface. This 3-pin interface is implemented such that the PCI7x20 device can connect to both the TPS2226 and TPS2228 power switches. Bit 10 (12V_SW_SEL) in |
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