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ISP1104W Datasheet(PDF) 5 Page - NXP Semiconductors |
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ISP1104W Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 19 page Philips Semiconductors ISP1104 Advanced USB transceiver Product data Rev. 02 — 14 October 2003 5 of 19 9397 750 11229 © Koninklijke Philips Electronics N.V. 2003. All rights reserved. 7. Functional description 7.1 Function selection [1] Signal levels on pins D + and D− are determined by other USB devices and external pull-up or pull-down resistors. [2] In the suspend mode (pin SUSPND = HIGH), the differential receiver is inactive and the output RCV is always LOW. Out-of-suspend (K) signalling is detected via the single-ended receivers VP and VM. 7.2 Operating functions [1] VP = VM = H indicates the sharing mode (VCC(5.0) is disconnected). [2] RCV* denotes the signal level on output RCV just before the SE0 state occurs. This level is stable during the SE0 period. Table 3: Function table SUSPND OE D + and D− RCV VP/VM Function L L driving/ receiving active active normal driving (differential receiver active) L H receiving[1] active active receiving H L driving inactive[2] active driving during ‘suspend’ (differential receiver inactive) H H high-Z[1] inactive[2] active low-power state Table 4: Driving function using single-ended input data interface (pin OE = L and pin MODE = L) FSE0 VO Data L L differential logic 0 L H differential logic 1 H L SE0 H H SE0 Table 5: Driving function using differential input data interface (pin OE = L and pin MODE = H) VMO VPO Data L L SE0 L H differential logic 1 H L differential logic 0 H H illegal state Table 6: Receiving function (pin OE=H) D + and D− RCV VP[1] VM[1] differential logic 0 L L H differential logic 1 H H L SE0 RCV*[2] LL |
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