ICS9LRS3187B Datasheet, PDF (6/20 Pages) Integrated Device Technology – PROGRAMMABLE TIMING CONTROL HUB FOR INTEL BASED SYSTEMS

ICS9LRS3187B
Programmable Timing Control Hub for Intel Based Systems
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
Index Block Write Operation
Controlle r (Host)
T
starT bit
IDT (Sla ve /Re ce ive r)
S lave Address D2_(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)
IDT (Sla ve /Re ce ive r)
T
starT bit
S lave Address D2_(H)
WR
W Rite
ACK
Beginning Byte = N
ACK
RT
Repeat starT
S lave Address D3_(H)
RD
ReaD
ACK
ACK
ACK
Data Byte Count = X
Beginning Byte N
N
Not acknowledge
P
stoP bit
Byte N + X - 1
IDT^® Programmable Timing Control Hub for Intel Based Systems
6
1602F—11/04/11