參數(shù)資料
型號(hào)： FSA9288AUMX
廠商： Fairchild Semiconductor
文件頁數(shù)： 16/30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
23
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
Table 8
– Timing for Timing Set 1 & 2 Registers
Setting Value
ADC Detection Time
Key Press Time
Long Key Press Time Switching Wait Time
0000
50ms
100ms
300ms
10ms
0001
100ms
200ms
400ms
30ms
0010
150ms
300ms
500ms
50ms
0011
200ms
400ms
600ms
70ms
0100
300ms
500ms
700ms
90ms
0101
400ms
600ms
800ms
110ms
0110
500ms
700ms
900ms
130ms
0111
600ms
800ms
1000ms
150ms
1000
700ms
900ms
1100ms
170ms
1001
800ms
1000ms
1200ms
190ms
1010
900ms
1300ms
210ms
1011
1000ms
1400ms
1100
1500ms
1101-1111
Note:
24. Each of the four registers can have unique register setting values.
9.8. Factory Modes
The FSA9280A has four dedicated Factory Modes that allow
efficient factory testing of a platform. Factory Modes are
initiated with the attachment of special test hardware, called
a
“JIG box” used for factory testing. FSA9280A automatically
configures switch paths to any factory-mode accessories
when VDDIO is present, without detaching and attaching the
micro-USB cable. Since the processor may not be awake
when a factory-mode accessory is detected, I
2C read
acknowledge is not required, nor does the FSA9280A
employ a switching wait timer found in the Timing Set 2
register for the initial switch configuration. A change of
resistor on the ID_CON pin dynamically switches between
factory modes and auto-configures the appropriate switch
paths without detaching and attaching the cable.
JIG output signals when a factory-mode accessory is
plugged in and BOOT
output
signals
the baseband
processor to boot up, allowing tests to be conducted with
and without the baseband processor powered up. As soon
as the factory-mode cable is removed, the FSA9280A
returns to a standard accessory flow that requires a device
detach between accessory type configurations changes
(except Audio Type 1 accessory described in the Audio
Accessory Detection section above). The typical key sensing
for Audio Type 1 accessories for wired remote is not active
for factory-mode test.
9.8.1.
Factory-Mode Accessory Detection
The different factory-mode accessories with the associated
resistor values (1% standard resistors) on the ID_CON pin,
the JIG and BOOT logic states, and switch configurations
are listed in Table 9.
Table 9. Factory Mode Auto-Configuration Table (1% Resistors on ID_CON Pin)
Configuration Type
VBUS_IN
DP_CON
DM_CON
ID_CON
BOOT
JIG
CHG_DET
Factory Mode 0
Jig: UART
Boot_On
Chg FET
Open
RxD
TxD
619k
HIGH
LOW
Hi-Z
Boot_Off
Chg FET
Open
RxD
TxD
523k
LOW
Hi-Z
Factory Mode 1
Jig: USB
Boot_On
Chg FET
Closed
DP_Host
DM_Host
301k
HIGH
LOW
Hi-Z
Boot_Off
Chg FET
Closed
DP_Host
DM_Host
255k
LOW
Hi-Z
Audio Type 1
Full
Remote
Audio_R
Audio_L
1000k
LOW
Hi-Z
Send/End
Remote
Audio_R
Audio_L
1002k
LOW
Hi-Z
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