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ICS9214 Datasheet, PDF (3/16 Pages) Integrated Circuit Systems – Rambus XDR Clock Generator | |||
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Integrated
Circuit
Systems, Inc.
ICS9214
General SMBus serial interface information for the ICS9214
How to Write:
⢠Controller (host) sends a start bit.
⢠Controller (host) sends the write address D8 (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 D8 (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 D9 (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
Index Block Write Operation
Controlle r (Host)
T
starT bit
ICS (Sla ve/Re ce ive r)
Slave Address D8(H)
WR
W Rite
ACK
Beginning Byte = N
ACK
Data Byte Count = X
ACK
Beginning Byte N
ACK
Byte N + X - 1
P
stoP bit
ACK
Index Block Read Operation
Controlle r (Host)
ICS (Sla ve/Re ce ive r)
T
starT bit
Slave Address D8(H)
WR
W Rite
ACK
Beginning Byte = N
ACK
RT
Repeat starT
Slave Address D9(H)
RD
ReaD
ACK
ACK
ACK
Data Byte Count = X
Beginning Byte N
N
Not acknowledge
P
stoP bit
Byte N + X - 1
0809Gâ08/02/08
3
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