參數(shù)資料
型號(hào)： FSA9288AUMX
廠商： Fairchild Semiconductor
文件頁數(shù)： 26/30頁
文件大?。?/td> 0K
描述： IC USB MULTIMEDIA SWITCH 20-UMLP
標(biāo)準(zhǔn)包裝： 5,000
功能： USB 開關(guān)
電路： 3:1
電壓電源： 單電源
電壓 - 電源，單路/雙路(±)： 3 V ~ 4.4 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 20-UFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-UMLP（4x3）
包裝： 帶卷 (TR)
2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA9280A Rev 1.1.0
5
FS
A9
2
80A
—
US
B
Po
rt
Mu
lt
im
edia
Swi
tc
h
,
Fea
turi
n
g
Automatic
Se
lect
a
nd
Ac
ces
s
ory
Detection
1. Functionality
The FSA9280A offers a complete solution for a single 5-pin
USB interface. Through built-in detection algorithms that
monitor the ID and VBUS pins of the USB interface, the
FSA9280A allows seamless sharing of the interface between
HS USB, FS USB or UART, and audio sources. The
FSA9280A also offers a complete solution for multiple types
of USB chargers. The FSA9280A detects different USB
charger types and has a dedicated charger IC interface to
allow charging through the devices and dynamic current
control by the charger IC based on the type of charger
detected. Additional over-current protection (OCP) and up to
28V over-voltage tolerance (OVT) is provided.
The detection features are capable of monitoring the ID pin of
the USB interface to detect a full array of USB accessories,
including audio accessories with up to 12 buttons.
1.1. Functional Overview
The
FSA9280A
is
designed
for
minimal
software
requirements for proper operation. The flow diagram below
shows the basic steps of operation and contains references
to more detailed information.
Flow Diagram
State
Datasheet
Section
Description
Power-up & Reset
Section 2
Applying power to the device and reset states
of the device.
I
2C
Section 3
Communication with device through I
2C
(which can be bypassed during power-up).
Configuration
Section 4
Configuring the device using I
2C and the
internal registers (which can be bypassed
during power-up).
Detection
Section 5
How the detection of the accessory is done
including attachment and detachment.
Processor
Communication
Section 6
How the detection of the accessory is
indicated to the processor.
Switch
Configuration
Section 7
Configuration of switches based on detection.
Active Signal
Section 8
Signal performance of selected configuration
Power-up &
Reset
Accessory
Plug-in
I2C
Detection
Processor
Communication
Switch
Configuration
Active Signals
Accessory
Detached
Configuration
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