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USB334X Datasheet(PDF) 27 Page - Microchip Technology |
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USB334X Datasheet(HTML) 27 Page - Microchip Technology |
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27 / 92 page  2009-2018 Microchip Technology Inc. DS00002646A-page 27 USB334x Note 5-1 When RESETB = 0 The HS termination will tri-state the USB drivers Note 5-2 The transceiver operation is not maintained in a combination that is not defined. The USB334x uses the 27% resistor ECN resistor tolerances. The resistor values are shown in Table 4-6. 5.3 Bias Generator This block consists of an internal bandgap reference circuit used for generating the driver current and the biasing of the analog circuits. This block requires an external 8.06KΩ,1% tolerance, reference resistor connected from RBIAS to ground. This resistor should be placed as close as possible to the USB334x to minimize the trace length. The nominal voltage at RBIAS is 0.8V +/- 10% and therefore the resistor will dissipate approximately 80 µW of power. Peripheral HS/FS Suspend 01b 1b 00b 0b 0b 1b 0b 0b 0b 0b Peripheral HS/FS Resume 01b 1b 10b 0b 0b 1b 0b 0b 0b 0b Peripheral LS 10b 1b 00b 0b 0b 0b 1b 0b 0b 0b Peripheral LS Suspend 10b 1b 00b 0b 0b 0b 1b 0b 0b 0b Peripheral LS Resume 10b 1b 10b 0b 0b 0b 1b 0b 0b 0b Peripheral Test J/Test K 00b 0b 10b 0b 0b 0b 0b 0b 0b 1b OTG device, Peripheral Chirp 00b 1b 10b 0b 1b 1b 0b 0b 1b 0b OTG device, Peripheral HS 00b 0b 00b 0b 1b 0b 0b 0b 1b 1b OTG device, Peripheral FS 01b 1b 00b 0b 1b 1b 0b 0b 1b 0b OTG device, Peripheral HS/FS Suspend 01b 1b 00b 0b 1b 1b 0b 0b 1b 0b OTG device, Peripheral HS/FS Resume 01b 1b 10b 0b 1b 1b 0b 0b 1b 0b OTG device, Peripheral Test J/Test K 00b 0b 10b 0b 1b 0b 0b 0b 1b 1b Charger Detection Connect Detect 01b 0b 00b0b 1b 0b0b0b1b0b Any combination not defined above, Note 5-2 0b 0b 1b 1b 0b Note: • This is equivalent to Table 40, Section 4.4 of the ULPI 1.1 specification. • USB334x does not support operation as an upstream hub port. See Section 6.4.1.3, "UTMI+ Level 3," on page 53. TABLE 5-1: DP/DM TERMINATION VS. SIGNALING MODE (CONTINUED) Signaling Mode ULPI Register Settings USB334x Termination Resistor Settings |
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