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9UMS9633BFW3LFT Datasheet(PDF) 9 Page - Integrated Device Technology |
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9UMS9633BFW3LFT Datasheet(HTML) 9 Page - Integrated Device Technology |
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9 / 18 page  IDTTM/ICSTM Ultra Mobile PC Clock for Automotive use 1425A—09/02/09 ICS9UMS9633BW ULTRA MOBILE PC CLOCK FOR AUTOMOTIVE USE 9 Datasheet General SMBus serial interface information for the ICS9UMS9633BW How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D2 (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 • 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 D2 (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 D3 (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 (Slave/Receiver) T WR ACK ACK ACK ACK ACK P stoP bit Index Block Write Operation Slave Address D2(H) Beginning Byte = N WRite starT bit Controller (Host) Byte N + X - 1 Data Byte Count = X Beginning Byte N T starT bit WR WRite RT Repeat starT RD ReaD Beginning Byte N Byte N + X - 1 N Not acknowledge PstoP bit Slave Address D3(H) Index Block Read Operation Slave Address D2(H) Beginning Byte = N ACK ACK Data Byte Count = X ACK ICS (Slave/Receiver) Controller (Host) ACK ACK |
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