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ICS951413 Datasheet(PDF) 5 Page - Integrated Circuit Systems

Part No. ICS951413
Description  Programmable System Clock Chip for ATI RS400 P4-based Systems
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Maker  ICST [Integrated Circuit Systems]
Homepage  http://www.icst.com
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ICS951413 Datasheet(HTML) 5 Page - Integrated Circuit Systems

 
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5
Integrated
Circuit
Systems, Inc.
ICS951413
0929C—03/07/05
General SMBus serial interface information for the ICS951413
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
(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 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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