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9DB633AGLFT Datasheet(PDF) 9 Page - Integrated Device Technology |
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9DB633AGLFT Datasheet(HTML) 9 Page - Integrated Device Technology |
9 / 14 page IDT® Six Output Differential Buffer for PCIe Gen3 1668C—04/20/11 9DB633 Six Output Differential Buffer for PCIe Gen3 9 Datasheet General SMBus serial interface information for the 9DB633 How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D4 (H) • ICS clock will acknowledge • Controller (host) sends the begining byte location = N • ICS clock will acknowledge • Controller (host) sends the data byte count = X • ICS clock will acknowledge • Controller (host) starts sending Byte N through Byte N + X -1 (see Note 2) • ICS 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 D4 (H) • ICS clock will acknowledge • Controller (host) sends the begining byte location = N • ICS clock will acknowledge • Controller (host) will send a separate start bit. • Controller (host) sends the read address D5 (H) • ICS clock will acknowledge • ICS clock will send the data byte count = X • ICS clock sends Byte N + X -1 • ICS clock sends Byte 0 through byte X (if X (H) was written to byte 8). • Controller (host) will need to acknowledge each byte • Controllor (host) will send a not acknowledge bit • Controller (host) will send a stop bit ICS (Sla ve /Re ce ive r) T W R 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 D4(H) B eginning Byte = N W Rite starT bit Controlle r (Host) T starT bit W R W Rite RT Repeat starT RD ReaD Beginning B yte N Byte N + X - 1 N Not acknowledge P stoP bit ICS (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 D4(H) B eginning Byte = N ACK ACK |
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