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USB3320 数据表(PDF) 37 Page - Microchip Technology |
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USB3320 数据表(HTML) 37 Page - Microchip Technology |
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37 / 70 page ![]() 2014-2015 Microchip Technology Inc. DS00001792B-page 37 USB3320 6.2.2 ULPI REGISTER READ A ULPI register read operation is given in Figure 6-5. The Link drives a TXD CMD byte with DATA[7:6] = 11h for a reg- ister read. DATA[5:0] of the ULPI TXD command bye contain the register address. 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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