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FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection
March 2013
FSA9280A
USB Port Multimedia Switch Featuring Automatic Select
and Accessory Detection
Features
Signals
Switch
Mechanism
Audio, USB, UART, USB Charging
Automatic Switching with
Available Interrupt
Headsets (Headphone/MIC/Remote)
USB Data Port (SDP)
UART Serial Link
USB Chargers (Car-Kit, CDP, DCP)
Factory-Mode
TTY Converter
FS and HS 2.0 Compliant
Battery Charging 1.1 Compliant
(Including Optional DCD)
Integrated Power FET
Over-Voltage Tolerance (OVT) 28V
Over-Current Protection (OCP) 1.5A
Over-Voltage Protection (OVP) 6.8V
Left, Right, MIC, TTY
3 to 4.4V
I
2
C
15kV IEC 61000-4-2 Air Gap
20-Lead UMLP
(3 x 4 x 0.55mm, 0.5mm Pitch)
FSA9280AUMX
Description
The FSA9280A is a high-performance multimedia switch
featuring automatic switching and accessory detection for
the USB port. This switch allows sharing of a common USB
port to pass audio, USB data / charging, as well as factory
programmability. In addition, the FSA9280A integrates
detection of accessories; such as headphones, headsets
(MIC / button), car chargers, USB chargers, and UART data
cables; with the ability to use a common USB connector. The
FSA9280A can be programmed for manual or automatic
switching of data paths based on accessory detected.
FSA9280A includes an integrated 28V over-voltage and
FSA9280A — USB Port Multimedia Switch, Featuring Automatic Select and Accessory Detection
Table of Contents
Features ....................................................................................................................................................................................... 1
Related Resources ....................................................................................................................................................................... 1
Table of Contents ......................................................................................................................................................................... 2
3. I C ......................................................................................................................................................................................... 7
5.1. USB Port Detection ................................................................................................................................................... 10
5.3. OCP and OVP Detection .......................................................................................................................................... 13
6. Processor Communication .................................................................................................................................................. 13
8. Active Signal Performance .................................................................................................................................................. 15
8.1. USB Data .................................................................................................................................................................. 15
8.2. FS USB ..................................................................................................................................................................... 15
9.5. Switch Path AC Electrical Characteristics ................................................................................................................. 18
9.6. I
2
C Controller DC Characteristics.............................................................................................................................. 19
9.7. I
2
C AC Electrical Characteristics & Register Map ..................................................................................................... 19
11.4. Systems with Multiple USB Controllers .................................................................................................................... 28
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Talking
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