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参数资料
| 型号： | FSA9280AUMX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 30/30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 |
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2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA9280A Rev 1.1.0
9
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s
ory
Detection
The FSA9280A monitors both VBUS_IN and ID_CON to detect
accessories. The ID_CON detection is a
“resistive detection”
that detects the resistance to GND on the ID_CON pin to
determine which accessory is attached. Table 3 shows the
assignment of accessories based on resistor values.
Table 3.
ID_CON Accessory Detection
Binary Value
ID_CON Resistance to GND
Accessory Detected
Min.
Typ.
Max.
00000
GND
DO NOT USE
00001
1.9k
2.0k
2.1k
Audio Send/End Button
00010
2.470k
2.604k
2.730k
Audio Remote S1 Button
00011
3.050k
3.208k
3.370k
Audio Remote S2 Button
00100
3.810k
4.014k
4.210k
Audio Remote S3 Button
00101
4.58k
4.82k
5.06k
Audio Remote S4 Button
00110
5.73k
6.03k
6.33k
Audio Remote S5 Button
00111
7.63k
8.03k
8.43k
Audio Remote S6 Button
01000
9.53k
10.03k
10.53k
Audio Remote S7 Button
01001
11.43k
12.03k
12.63k
Audio Remote S8 Button
01010
13.74k
14.46k
15.18k
Audio Remote S9 Button
01011
16.40k
17.26k
18.12k
Audio Remote S10 Button
01100
19.48k
20.50k
21.53k
Audio Remote S11 Button
01101
22.87k
24.07k
25.27k
Audio Remote S12 Button
01110
27.27k
28.70k
30.14k
Reserved Accessory #1
01111
32.3k
34.0k
35.7k
Reserved Accessory #2
10000
38.19k
40.20k
42.21k
Reserved Accessory #3
10001
47.41k
49.90k
52.40k
Reserved Accessory #4
10010
61.66k
64.90k
68.15k
Reserved Accessory #5
10011
76.1k
80.7k
84.1k
DO NOT USE
10100
96.9k
102.0k
107.1k
DO NOT USE
10101
115k
121k
127k
TTY Converter
10110
143k
150k
157k
UART Cable
10111
190k
200k
206k
USB: See Table 4
11000
247.3k
255k
262.7k
Factory Mode Boot OFF-USB
11001
292k
301k
310k
Factory Mode Boot ON-USB
11010
347k
365k
383k
Audio Cradle
11011
428.7k
442.0k
455.3k
USB: See Table 4
11100
507.3k
523k
538.7k
Factory Mode Boot OFF-UART
11101
600.4k
619k
637.6k
Factory Mode Boot ON-UART
11110
750k
1000k
1050k
Audio Type 1 with Remote
750k
1002k
1050k
Audio Type 1 / Only Send-End
11111
20M
Open
USB Mode, Dedicated Charger or Accessory Detach
Notes:
4.
The binary values are reported in the binary register (07h) with each valid accessory detection.
5.
The accessory type is reported in the Device Type 1 (0Bh), Device Type 2 (0Bh), Button 1 (0Ch), and Button 2 (0Dh)
registers with each valid accessory detection.
6.
These resistor values are created by multiple standard resistor values in series to form the button presses on the wired
remote (see Figure 12).
7.
For the ID float, ID
“open” is recommended; otherwise, capacitance should be minimized.
8.
Audio devices with remote and audio devices with only send/end are both reported as Audio Type 1 in the Device Type 1
register (see the Audio Accessory Detection section below). Type 1 is for passive resistor audio accessories and a future
Audio Type 2 is designated for active audio accessories.
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