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9DBU0541AKLFT Datasheet(PDF) 10 Page - Integrated Device Technology |
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9DBU0541AKLFT Datasheet(HTML) 10 Page - Integrated Device Technology |
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10 / 17 page  5-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER WITH ZO=100OHMS 10 MARCH 9, 2017 9DBU0541 DATASHEET General SMBus Serial Interface Information How to Write • Controller (host) sends a start bit • Controller (host) sends the write address • IDT clock will acknowledge • Controller (host) sends the beginning byte location = N • IDT clock will acknowledge • Controller (host) sends the byte count = X • IDT clock will acknowledge • Controller (host) starts sending Byte N through Byte N+X-1 • IDT clock will acknowledge each byte one at a time • Controller (host) sends a stop bit Note: SMBus Address is Latched on SADR pin. How to Read • Controller (host) will send a start bit • Controller (host) sends the write address • IDT clock will acknowledge • Controller (host) sends the beginning byte location = N • IDT clock will acknowledge • Controller (host) will send a separate start bit • Controller (host) sends the read address • IDT clock will acknowledge • IDT clock will send the data byte count = X • IDT clock sends Byte N+X-1 • IDT clock sends Byte 0 through Byte X (if X(H) was written to Byte 8) • Controller (host) will need to acknowledge each byte • Controller (host) will send a not acknowledge bit • Controller (host) will send a stop bit Index Block Write Operation Controller (Host) IDT (Slave/Receiver) TstarT bit Slave Address WR WRite ACK Beginning Byte = N ACK Data Byte Count = X ACK Beginning Byte N ACK O O O O O O Byte N + X - 1 ACK PstoP bit Index Block Read Operation Controller (Host) IDT (Slave/Receiver) TstarT bit Slave Address WR WRite ACK Beginning Byte = N ACK RT Repeat starT Slave Address RD ReaD ACK Data Byte Count=X ACK Beginning Byte N ACK O O O O O O Byte N + X - 1 N Not acknowledge PstoP bit |
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