BW9821
1-Port eUSB2 Repeater
The BW9821 is a 1-port eUSB2 repeater which translates between eUSB2 and USB 2.0 signaling, and it is dual-role capable supporting both host mode and device mode. The BW9821 supports High-Speed (HS), Full-Speed (FS) and Low-Speed (LS) operation, and consumes ultra-low power in L1/L2 states. It also supports auto-resume for better interoperability in case the host controller is not capable to initiate Resume in time. The BW9821 provides various registers for function configuration and fine-tuning for USB 2.0 and eUSB2 PHY via RAP (Register Access Protocol) or I2C interface. The BW9821 is powered by 1.8V and 3.3V, and does not require specific power-on sequence.
All available packages for BW9821 are listed in the following table.
All available packages for BW9821 are listed in the following table.
|
Product Series
|
Package Type
|
|---|---|
|
BW9821
|
QFN 12
|
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Compliant with USB 2.0 and eUSB2 (rev 1.2) spec
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Support High-Speed (HS), Full-Speed (FS) and Low-Speed (LS) operation
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Support LPM L1 (Sleep) and L2 (Suspend)
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Support 1.2V FS/LS signaling of eUSB2 interface
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Support host and device mode (dual-role repeater)
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Support auto-resume in host mode
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Support register access protocol (RAP)
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Accept RAP at any time, not only in Default state
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-
-
Compliant with “USB 2.0 DC Resistance” ECN with programmable squelch and disconnect threshold
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Compliant with “USB 2.0 eUSB2 repeater effects” ECN (ver. 20240820)
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Compliant with Battery Charging (rev 1.2) spec
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Support CDP and DCP advertising
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Support SDP, CDP and DCP detection
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-
Programmable TX swing and RX equalization for both USB2.0 and eUSB2 interfaces
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I2C Interface
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Support 3.3V, 1.8V interface
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Support Standard-mode, Fast-mode, and Fast-mode Plus
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Support byte and burst read/write
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4-level ADDR pin
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-
USB 2.0 DP/DM pins are 5V tolerance
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Supply 3.3V (VDD33) and 1.8V (VDD18) power
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Not require the power sequence
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Power on flow done and enter eUSB2 Default state within 4ms after power supplies are valid
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BW9821
