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© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA221 Rev. 1.0.3 2 Pin Assignments Gnd Vbus 10 L D- D+ R Vaudio D+/R ASel D-/L 2 1 3 4 5 9 8 7 6 Gnd Vbus 10 L D- D+ R L D- D+ R Vaudio D+/R ASel D-/L Vaudio D+/R ASel D-/L 2 1 3 4 2 1 3 4 5 9 8 7 6 9 8 7 6 Vbus GND 110 9 8 7 6 5 4 3 2 D+ D- R L D+/R D-/L Vaudio ASel Vbus GND 110 9 8 7 6 5 4 3 2 D+ D- R L D+/R D-/L Vaudio ASel Vbus GND 1 8 5 4 3 2 D+ D- R L D+/R D-/L Vaudio ASel 9 10 6 7 Vbus GND 1 8 5 4 3 2 D+ D- R L D+/R D-/L Vaudio ASel 9 10 6 7 Figure 2. 10-Pin MicroPak Figure 3. 10-Pin MSOP Figure 4. 10-Pin µMLP Pin Descriptions Name Description Vaudio Power supply (audio) Vbus Power supply (USB) and auto USB switch-path select ASel Audio select to override auto USB detect when VAUDIO supply is present D+, D- USB data bus input sources R, L Audio right and left input sources D+/R, D-/L USB and audio common connector ports Truth Table ASel (1) Vaudio Vbus L, R D+, D- L L L OFF OFF L L H (2) OFF ON L H (2) L ON OFF L H (2) H (2) OFF ON H L L OFF OFF H L H (2) OFF ON H H (2) L ON OFF H H (2) H (2) ON OFF Notes: 1. ASel - Internal resistor to GND provides auto-Vbus detect if there is no external connection. Forcing ASel HIGH when VAUDIO is present overrides the USB path even if Vbus is present. 2. H - Value is the threshold as defined to meet USB2.0 Vbus requirements and audio supply threshold in a system (see DC Tables). |
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