参数资料
型号: FSA9280AUMX
厂商: Fairchild Semiconductor
文件页数: 4/30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
12
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
5.2. Audio Accessory Detection
Audio
accessories are detected when the ID_CON pin resistance to GND is approximately 1M. Configurations for this audio
accessory shown in Figure 12 and Figure 13 .
Figure 12.
Audio Accessory with Just Send/End Button (1% or 5% Resistors)
604
2
k
ID_
CON
FSA9280A
Phone
Headset with Remote
ID
Detect
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
976
k
SEND/
END
Hold
Right Earpiece
Left
Earpiece
Microphone
VBUS_IN
DP_
CON
DM_
CON
604
806
806
1.21k 2k
2
k
2
k
2.43
k
2.8
k 3.24k 3.57k
Figure 13.
Audio Accessory with Full Wired Remote Control (1% Resistors)
The FSA9280A can detect and differentiate between regular
key presses, long key presses, and a stuck key. The
definition of the key press timing is user configurable by
writing the Timing Set 1 (08h) and Timing Set 2 (09h)
registers. Timing diagrams for the key press detection are
shown below in Figure 14 and Figure 15.
Figure 14.
Regular Key-Press Timing Diagram
Figure 15.
Long Key-Press Timing Diagram
Key Depressed,
Timing starts
tKP
tLKP
Error
Key Press
Long Key Press
INTB
t0
P read
and clear
INTB Released
after P read
Key
KP Bit Set
tKP-t0 = Key
Press bits value
tLKP-t0 = Long Key
Press bits value
LKP Bit Set
LKR Bit Set
P read
and clear
P read
and clear
INTB Released
after P read
INTB Released
after P read
tKP
tLKP
t0
INTB
Key
tKP-t0 = Key
Press bits value
tLKP-t0 = Long Key
Press bits value
2k?
ID_
CON
FSA 9280A
Phone
Headset with Send/End Only
ID
Detect
1 M?
SEND /
END
Right Earpiece
Left
Earpiece
Microphone
VBUS_IN
DP_
CON
DM _
CON
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