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EP1C12F100C6ES Datasheet(PDF) 60 Page - Altera Corporation |
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EP1C12F100C6ES Datasheet(HTML) 60 Page - Altera Corporation |
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60 / 104 page  2–54 Altera Corporation Preliminary January 2007 Cyclone Device Handbook, Volume 1 Each I/O bank can support multiple standards with the same VCCIO for input and output pins. For example, when VCCIO is 3.3-V, a bank can support LVTTL, LVCMOS, 3.3-V PCI, and SSTL-3 for inputs and outputs. LVDS I/O Pins A subset of pins in all four I/O banks supports LVDS interfacing. These dual-purpose LVDS pins require an external-resistor network at the transmitter channels in addition to 100- Ωtermination resistors on receiver channels. These pins do not contain dedicated serialization or deserialization circuitry; therefore, internal logic performs serialization and deserialization functions. Table 2–13 shows the total number of supported LVDS channels per device density. MultiVolt I/O Interface The Cyclone architecture supports the MultiVolt I/O interface feature, which allows Cyclone devices in all packages to interface with systems of different supply voltages. The devices have one set of VCC pins for internal operation and input buffers (VCCINT), and four sets for I/O output drivers (VCCIO). Table 2–13. Cyclone Device LVDS Channels Device Pin Count Number of LVDS Channels EP1C3 100 (1) 144 34 EP1C4 324 103 400 129 EP1C6 144 29 240 72 256 72 EP1C12 240 66 256 72 324 103 EP1C20 324 95 400 129 Note to Table 2–13: (1) EP1C3 devices in the 100-pin TQFP package do not support the LVDS I/O standard. |
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