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9LRS3187BKLFT Datasheet(PDF) 6 Page - Integrated Device Technology |
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9LRS3187BKLFT Datasheet(HTML) 6 Page - Integrated Device Technology |
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6 / 20 page  IDT® Programmable Timing Control Hub for Intel Based Systems 1602F—11/04/11 ICS9LRS3187B Programmable Timing Control Hub for Intel Based Systems 6 Datasheet General SMBus serial interface information for the ICS9LRS3187B How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D2 (H) • IDT clock will acknowledge • Controller (host) sends the beginning byte location = N • IDT clock will acknowledge • Controller (host) sends the data 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 How to Read: • Controller (host) will send start bit. • Controller (host) sends the write address D2 (H) • IDT clock will acknowledge • Controller (host) sends the begining byte location = N • IDT clock will acknowledge • Controller (host) will send a separate start bit. • Controller (host) sends the read address D3 (H) • 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 IDT (Sla ve /Re ce ive r) T WR ACK ACK ACK ACK ACK P Byte N + X - 1 Data Byte Count = X B eginning Byte N stoP bit Index Block Write Operation S lave Address D2(H) B eginning Byte = N WRite starT bit Controlle r (Host) T starT bit WR WRite RT Repeat starT RD ReaD Beginning B yte N Byte N + X - 1 N Not acknowledge PstoP bit IDT (Sla ve /Re ce ive r) Controlle r (Host) ACK ACK Data Byte Count = X ACK S lave Address D3(H) Index Block Read Operation S lave Address D2(H) B eginning Byte = N ACK ACK |
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