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USB333X bảng dữ liệu(PDF) 44 Page - Microchip Technology

tên linh kiện USB333X
Giải thích chi tiết về linh kiện  Industry?셲 Smallest Hi-Speed USB Transceiver with Single Supply Operation
PDF  85 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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USB333X bảng dữ liệu(HTML) 44 Page - Microchip Technology

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USB333x
DS00001880A-page 44
 2009 - 2015 Microchip Technology Inc.
6.2.3
ULPI REGISTER READ
A ULPI register read operation is given in Figure 6-5. The Link drives a TX CMD byte with DATA[7:6] = 11h for a register
read. DATA[5:0] of the ULPI TX command bye contain the register address.
At T0, the Link will place the TX CMD on the data bus. At T2, the PHY will bring NXT high, signaling the Link it is ready
to accept the data transfer. At T3, the PHY reads the TX CMD, determines it is a register read, and asserts DIR to gain
control of the bus. The PHY will also de-assert NXT. At T4, the bus ownership has transferred back to the PHY and the
FIGURE 6-4:
ULPI EXTENDED REGISTER WRITE IN SYNCHRONOUS MODE
FIGURE 6-5:
ULPI REGISTER READ IN SYNCHRONOUS MODE
DIR
CLK
DATA[7:0]
STP
NXT
TXD CMD
(extended reg write)
Idle
Reg Data[n]
Idle
ULPI Register
Reg Data [n-1]
Reg Data [n]
T0
T1
T2
T3
T5
T4
T6
Extended
address
T7
DIR
CLK
DATA[7:0]
STP
NXT
TXD CMD
reg read
Idle
T0
Reg Data
Turn around
Turn around
T1
T2
T3
T4
T5
T6
Idle



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