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參數資料
型號: TS5USBA43402YZPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 模擬信號調理
英文描述: SPECIALTY ANALOG CIRCUIT, PBGA20
封裝: 0.50 MM PITCH, DSBGA-20
文件頁數: 4/23頁
文件大小: 235K
代理商: TS5USBA43402YZPR
2.6 V
2.21 k
1%
W ±
R2.2k Pin
ID Resistor
ID Resistor
Tolerance
ID No.
ADC Value
0
W
1%
0
0000
24 k
W
1%
1
0001
56 k
W
1% or 20%
2
0010
100 k
W
1%
3
0011
130 k
W
1%
4
0100
180 k
W
1%
5
0101
240 k
W
1%
6
0110
330 k
W
1%
7
0111
430 k
W
1%
8
1000
620 k
W
1%
9
1001
910 k
W
1%
10
1010
Open
N/A
11
1011
SCDS297 – APRIL 2010
www.ti.com
APPLICATION INFORMATION
Default Switch Position
The default switch state (DSS) pin determines if the USB switches or UART switches are selected at startup. An
internal pulldown resistor is present on the DSS pin, which selects the USB switches as the default at start-up. If
the user wants to default to the UART switches at startup, the DSS pin must be pulled high. If the user wants to
disable the switches, this must be done using an I2C write to the SW_Control register after initialization is
complete.
The default configuration with VBAT power disables the switches. If the user wants to use the switches, this must
be done using an I2C write to the SW_Control register after initialization is complete.
VBUS PRESENT
DSS
SWITCH STATES
ON POWER UP
OPEN / PD
USB
Yes
PU
UART
No
x
Disable
ID Impedance Detection
The TS5USBA43402 features impedance detection for identification of various accessories that are attached to
the microUSB port. Each accessory is identified by a unique resistor value on the ID pin to ground. During ID
detection, the device auto-calibrates an internal current source, using an external 2.21K ±1% resistor. The
current source is then applied to the ID pin while an internal voltage reference is incremented until it matches the
ID pin voltage. This produces a 4-bit ADC value corresponding to the ID resistance found.
Figure 1. Figure 1. Impedance Detection Circuitry
12
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TS5USBA43402
相關PDF資料
PDF描述
TS83006CE1 1-CH 6-BIT FLASH METHOD ADC, PARALLEL ACCESS, CQCC68
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