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EP4CGX30F17C8 Datasheet(PDF) 11 Page - Altera Corporation |
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EP4CGX30F17C8 Datasheet(HTML) 11 Page - Altera Corporation |
11 / 42 page Chapter 1: Cyclone IV Device Datasheet 1–11 Operating Conditions May 2013 Altera Corporation Cyclone IV Device Handbook, Volume 3 Internal Weak Pull-Up and Weak Pull-Down Resistor Table 1–12 lists the weak pull-up and pull-down resistor values for Cyclone IV devices. Hot-Socketing Table 1–13 lists the hot-socketing specifications for Cyclone IV devices. 1 During hot-socketing, the I/O pin capacitance is less than 15 pF and the clock pin capacitance is less than 20 pF. Table 1–12. Internal Weak Pull -Up and Weak Pull-Down Resistor Values for Cyclone IV Devices (1) Symbol Parameter Conditions Min Typ Max Unit R_PU Value of the I/O pin pull-up resistor before and during configuration, as well as user mode if you enable the programmable pull-up resistor option VCCIO = 3.3 V ± 5% (2), (3) 7 2541k VCCIO = 3.0 V ± 5% (2), (3) 7 2847k VCCIO = 2.5 V ± 5% (2), (3) 8 3561k VCCIO = 1.8 V ± 5% (2), (3) 10 57 108 k VCCIO = 1.5 V ± 5% (2), (3) 13 82 163 k VCCIO = 1.2 V ± 5% (2), (3) 19 143 351 k R_PD Value of the I/O pin pull-down resistor before and during configuration VCCIO = 3.3 V ± 5% (4) 6 1930k VCCIO = 3.0 V ± 5% (4) 6 2236k VCCIO = 2.5 V ± 5% (4) 6 2543k VCCIO = 1.8 V ± 5% (4) 7 3571k VCCIO = 1.5 V ± 5% (4) 850 112 k Notes to Table 1–12: (1) All I/O pins have an option to enable weak pull -up except the configuration, test, and JTAG pins. The weak pull-down feature is only available for JTAG TCK. (2) Pin pull -up resistance values may be lower if an external source drives the pin higher than VCCIO. (3) R_PU = (VCCIO –VI)/IR_PU Minimum condition: –40°C; VCCIO = VCC + 5%, VI = VCC + 5% – 50 mV; Typical condition: 25°C; VCCIO = VCC, VI = 0 V; Maximum condition: 100°C; VCCIO = VCC – 5%, VI = 0 V; in which VI refers to the input voltage at the I/O pin. (4) R_PD = VI/IR_PD Minimum condition: –40°C; VCCIO = VCC + 5%, VI = 50 mV; Typical condition: 25°C; VCCIO = VCC, VI = VCC –5%; Maximum condition: 100°C; VCCIO = VCC – 5%, VI = VCC – 5%; in which VI refers to the input voltage at the I/O pin. Table 1–13. Hot -Socketing Specifications for Cyclone IV Devices Symbol Parameter Maximum IIOPIN(DC) DC current per I/O pin 300 A IIOPIN(AC) AC current per I/O pin 8 mA (1) IXCVRTX(DC) DC current per transceiver TX pin 100 mA IXCVRRX(DC) DC current per transceiver RX pin 50 mA Note to Table 1–13: (1) The I/O ramp rate is 10 ns or more. For ramp rates faster than 10 ns, |IIOPIN| = C dv/dt, in which C is the I/O pin capacitance and dv/dt is the slew rate. |
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