参数资料
型号: FSA9280AUMX
厂商: Fairchild Semiconductor
文件页数: 17/30页
文件大小: 0K
描述: IC USB MULTIMEDIA SWITCH 20-UMLP
标准包装: 1
功能: USB 开关
电路: 3:1
电压电源: 单电源
电压 - 电源,单路/双路(±): 3 V ~ 4.4 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-UFQFN 裸露焊盘
供应商设备封装: 20-UMLP(4x3)
包装: 标准包装
其它名称: FSA9280AUMXDKR
2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA9280A Rev 1.1.0
24
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
Notes:
25. The charger FET closes for factory-mode BOOT ON-UART or factory-mode BOOT OFF-UART if VBUS_IN is valid only
during the time when the cable is first plugged in or a new ID_CON resistor is detected.
26. Audio-type device configuration is entered as part of the factory-mode flow shown in Figure 24 where the ID_CON pin is
not monitored for key presses and JIG remains LOW until the factory jig box is detached from the phone. MIC is not
connected in this audio type case. Figure 24 provides the attach flow diagram for the JIG box accessory. If any of the
factory modes is first entered and JIG=LOW; then and only then, can the ID_CON resistor (1M) dynamically switch to
Audio Type 1 accessory without a cable detach. For the latter case, factory-mode Audio Type 1 accessory auto-
configures the switches such that: Audio_L = DM_CON.
27. MIC is left unconnected.
28. The typical key sensing for Audio Type 1 accessories for wired remote is not active for this factory-mode test.
Figure 24.
Factory Mode Flow
Standby
FSA9280A
Detects JIG
Attachment
INTB Asserted and
Switch Paths Auto-
Configured per
Table 9
FSA9280A Writes
Device Register
and Asserts JIG
LOW
FSA9280A Enters
Standby
P Reads Interrupt
Registers
NO
YES
NO
ID Float >70ms
NO
Exit Factory Mode
Accessory Flow
YES
V
DDIO
HIGH?
YES
NO
ID Change?
Rid=Factory
Mode or Audio
Type 1 Value
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