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IMX35 데이터시트(PDF) 126 Page - Freescale Semiconductor, Inc |
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IMX35 데이터시트(HTML) 126 Page - Freescale Semiconductor, Inc |
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126 / 148 page ![]() i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6 Freescale Semiconductor 126 Figure 104. USB Receive Waveform in DAT_SE0 Unidirectional Mode Table 85 describes the port timing specification in DAT_SE0 unidirectional mode. 4.9.24.3 VP_VM Bidirectional Mode Table 86 defines the signals for VP_VM bidirectional mode. Figure 105 and Figure 106 show the transmit and receive waveforms respectively. Table 85. USB Port Timing Specification in DAT_SE0 Unidirectional Mode No. Parameter Signal Name Signal Source Min. Max. Unit Condition/ Reference Signal US9 Tx rise/fall time USB_DAT_VP Out — 5.0 ns 50 pF US10 Tx rise/fall time USB_SE0_VM Out — 5.0 ns 50 pF US11 Tx rise/fall time USB_TXOE_B Out — 5.0 ns 50 pF US12 Tx duty cycle USB_DAT_VP Out 49.0 51.0 % — US15 Rx rise/fall time USB_VP1 In — 3.0 ns 35 pF US16 Rx rise/fall time USB_VM1 In — 3.0 ns 35 pF US17 Rx rise/fall time USB_RCV In — 3.0 ns 35 pF Table 86. Signal Definitions—VP_VM Bidirectional Mode Name Direction Signal Description USB_TXOE_B Out Transmit enable, active low USB_DAT_VP Out (Tx) In (Rx) Tx VP data when USB_TXOE_B is low Rx VP data when USB_TXOE_B is high USB_SE0_VM Out (Tx) In (Rx) Tx VM data when USB_TXOE_B low Rx VM data when USB_TXOE_B high USB_RCV In Differential Rx data US16 US15/US17 USB_VP1 USB_TXOE_B Receive USB_VM1 USB_RCV |
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