ICS9EX21801AKLFT IDT, Integrated Device Technology Inc, ICS9EX21801AKLFT Datasheet - Page 9

• Manufacturer Part Number: ICS9EX21801AKLFT
• Description: IC FANOUT BUFF DIFF 20-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of ICS9EX21801AKLFT

• Input: *
• Output: Clock
• Frequency - Max: 400MHz
• Voltage - Supply: *
• Operating Temperature: *
• Mounting Type: Surface Mount
• Package / Case: *
• Frequency-max: 400MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 9EX21801AKLFT

Note: The address is selectable among 4 values (page 2).
IDT
ICS9EX21801A
18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux
TM
How to Write:
• Controller (host) sends a start bit.
• Controller (host) sends the write address D4
• 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
• ICS clock will acknowledge each byte one at a time
• Controller (host) sends a Stop bit
18 Output PCIe G2/QPI Differential Buffer with 2:1 input mux
Byte N + X -1
WR
P
T
Beginning Byte N
Data Byte Count = X
Index Block Write Operation
Slave Address D4
Beginning Byte = N
General SMBus serial interface information for the ICS9EX21801A
Byte N + X - 1
Controller (Host)
starT bit
stoP bit
WRite
(h)
*
ICS (Slave/Receiver)
ACK
ACK
ACK
ACK
ACK
(h)
9
How to Read:
• Controller (host) will send start bit.
• Controller (host) sends the write address D4
• ICS clock will acknowledge
• Controller (host) sends the begining byte
• ICS clock will acknowledge
• Controller (host) will send a separate start bit.
• Controller (host) sends the read address D5
• 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
• Controller (host) will need to acknowledge each byte
• Controllor (host) will send a not acknowledge bit
• Controller (host) will send a stop bit
location = N
was written to byte 8)
WR
RD
RT
N
P
T
Slave Address D4
Slave Address D5
Index Block Read Operation
Beginning Byte = N
Controller (Host)
Not acknowledge
ACK
ACK
Repeat starT
starT bit
stoP bit
WRite
ReaD
(h)
(h)
*
*
.
ICS (Slave/Receiver)
Data Byte Count = X
Beginning Byte N
Byte N + X - 1
ACK
ACK
ACK
1463B — 01/20/10
Datasheet
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(h)
(h)