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USB334X 数据表(PDF) 75 Page - Microchip Technology

部件名 USB334X
功能描述  Enhanced Single Supply Hi-Speed USB ULPI Transceiver
PDF  92 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB334X 数据表(HTML) 75 Page - Microchip Technology

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2009-2018 Microchip Technology Inc.
DS00002646A-page 75
USB334x
Note 7-4
rd: Read Only with auto clear.
7.1.3.5
USB IO & Power Management
Address = 39-3Bh (read), 39h (write), 3Ah (set), 3Bh (clear)
RidConversionStart
4
rd/w/s/c
0b
When this bit is asserted either through a register
write or set, the Rid converter will read the value of
the ID resistor. When the conversion is complete this
bit will auto clear.
Reserved
5
rd/w/s/c
0b
This bit must remain at 0.
RidIntEn
6
rd/w/s/c
0b
When enabled an interrupt will be generated on the
alt_int of the RXCMD byte when RidConversionDone
bit is asserted.
Note:
This register bit is or’ed with the RidIntEn bit
of the Carkit Interrupt Status register.
Reserved
7
rd
0b
Read only, 0.
Field Name
Bit
Access
Default
Description
Reserved
0
rd/w/s/c
0b
Read only, 0.
SwapDP/DM
1
rd/w/s/c
0b
When asserted, the DP and DM pins of the USB
transceiver are swapped. This bit can be used to
prevent crossing the DP/DM traces on the board. In
UART mode, it swaps the routing to the DP and DM
pins. In USB Audio Mode, it does not affect the
SPK_L and SPK_R pins.
UART RegOutput
3:2
rd/w/s/c
01b
Controls the output voltage of the VBAT to VDD33
regulator in UART mode. When the PHY is switched
from USB mode to UART mode regulator output will
automatically change to the value specified in this
register when TxdEn is asserted.
00: 3.3V
01: 3.0V (default)
10: 2.75V
11: 2.5V
Note:
When in USB Audio Mode the regulator will
remain at 3.3V. When using this register it is
recommended that the Link exit UART
mode by using the RESETB pin.
ChargerPullupEnDP
4
rd/w/s/c
0b
Enables the RCD Pull-up resistor on the DP pin. (The
pull-up is automatically enabled in UART mode)
ChargerPullupEnDM
5
rd/w/s/c
0b
Enables the RCD Pull-up resistor on the DM pin. (The
pull-up is automatically enabled in UART mode)
Field Name
Bit
Access
Default
Description



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