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AX88178 Datasheet(PDF) 7 Page - ASIX Electronics Corporation |
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AX88178 Datasheet(HTML) 7 Page - ASIX Electronics Corporation |
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7 / 35 page  ASIX ELECTRONICS CORPORATION 7 AX88178 L USB to 10/100/1000 Gigabit Ethernet/HomePNA Controller FORCEFS_N I3/PU 15 Force USB Full Speed (active low). For normal operation, user should keep this pin NC to enable USB High Speed handshaking process to decide the speed of USB bus. Setting this pin low sets the device to operate at Full speed mode only and disables Chirp K (HS handshaking process). LED O3 125 LED indicator: When USB bus is in Full speed, this pin drives high continuously. When USB bus is in High speed, this pin drives low continuously. This pin drives high and low in turn (blinking) to indicate TX data transfer going on whenever the host controller sends bulk out data transfer. USB_SPEED_LE D O3 126 USB bus speed LED indicator. When USB bus is in Full speed, this pin drives high continuously. When USB bus is in High speed, this pin drives low continuously. TESTSPEEDUP I3/PD 13 Test pin. For normal operation, user should keep this pin NC. HS_TEST_MODE I3/PD 42 Test pin. For normal operation, user should keep this pin NC. SCAN_TEST I3/PD 43 Test pin. For normal operation, user should keep this pin NC. SCAN_ENABLE I3/PD 44 Test pin. For normal operation, user should keep this pin NC. CLK60EXT I3/PD 45 Test pin. For normal operation, user should keep this pin NC. CLKSEL I3/PD 46 Test pin. For normal operation, user should keep this pin NC. DB I2 65 Debug pin. For normal operation, user should connect to AVDDK through a pulled-up resistor. On-chip Regulator Pins INT_REGULATO R_EN I 20 On-chip 3.3V to 2.5V voltage regulator enable. Connect this pin to VDDAH directly to enable on-chip regulator. Connect this pin to GNDAH to disable on-chip regulator. VDDAH P 22 3.3V Power supply to on-chip 3.3V to 2.5V voltage regulator. GNDAH P 23 Ground pin of on-chip 3.3V to 2.5V voltage regulator. V25 P 21 2.5V voltage output of on-chip 3.3V to 2.5V voltage regulator. Power and Ground Pins VDDK P 16, 24, 74, 99, 118 Digital Core Power. 2.5V. VDD2 P 80, 86, 123 Digital I/O Power. 2.5V. VDD3 P 8, 19, 41, 97, 128 Digital I/O Power. 3.3V. GND P 7, 17, 18, 25, 40, 75, 81, 87, 98, 100, 119, 124, 127 Digital Ground. AVDDK P 49, 53, 57, 64, 66, 68 Analog Core Power. 2.5V. AVDD3 P 28, 37, 39 Analog I/O Power. 3.3V. AGND P 29, 33, 38, 50, 54, 55, 60, 63, 67, 69 Analog Ground. |
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