參數(shù)資料
型號(hào): FSA9288AUMX
廠商: Fairchild Semiconductor
文件頁(yè)數(shù): 2/30頁(yè)
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
10
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
200ms
Switch State
INTB Asserted
Accessory
Attached
ID Resistance
XXXXXX
FLOAT
INTB Pin
BB Reads INTB
10ms
wait
time
BB read
and
clear
Configured Switch
Closes
Closed
Open
Figure 8. ID-Based Accessories, No VBUS_IN Attach Timing with Default Switching Wait Bits of 10ms
5.1. USB Port Detection
The multiple types of USB 2.0 ports that the FSA9280A can detect are summarized in Table 4. These devices are unique in
that VBUS must be present to detect these accessories.
Table 4.
ID_CON and VBUS_IN Detection for USB Devices
ADC
Value
VBUS_IN
DP_CON
ID_CON Resistance to GND
Accessory Detected
Min.
Typ.
Max.
10111
5V
X
190k
200k
206k
Car Kit Type 1 Charger
11011
5V
X
428.7k
442k
455.3k
Car Kit Type 2 Charger
11111
5V
20M
Open
USB Dedicated Charging Port, Travel
Adapter or Dedicated Charger (DCP)
11111
5V
20M
Open
USB Charging Downstream Port (CDP)
11111
5V
20M
Open
USB Standard Downstream Port (SDP)
Notes:
9.
The ADC values are reported in the ADC register (07h) with an each valid accessory detection.
10. The accessory type is reported in the Device Type 1 (0Bh) and Car Kit Status (0Eh) registers with an each valid
accessory detection.
11. Follows the ANSI/CEA-936-A USB Car Kit specification.
12. The FSA9280A follow the Battery Charging 1.1 specification, which uses DP_CON and DM_CON to determine what USB
accessory is attached (refer to the specification for details).
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