ics9db102 Integrated Device Technology, ics9db102 Datasheet - Page 8

• Manufacturer Part Number: ics9db102
• Description: 2 Output Pci Express Buffer With Clkreq Function
• Manufacturer: Integrated Device Technology

IDT
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
ICS9DB102
2 Output PCI Express* Buffer with CLKREQ# Function
TM
Byte N + X -1
/ICS
WR
P
T
TM
Beginning Byte N
Data Byte Count = X
Index Block Write Operation
Beginning Byte = N
Slave Address D4
Byte N + X - 1
Controller (Host)
2 Output Express* Buffer with CLKREQ# Function
General SMBus serial interface information for the ICS9DB102
starT bit
stoP bit
WRite
(h)
ICS (Slave/Receiver)
ACK
ACK
ACK
ACK
ACK
(h)
8
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
WR
location = N
was written to byte 8)
RD
RT
N
P
T
Index Block Read Operation
Beginning Byte = N
Slave Address D4
Slave Address D5
Controller (Host)
Not acknowledge
ACK
ACK
Repeat starT
starT bit
stoP bit
WRite
ReaD
(h)
(h)
.
ICS9DB102
ICS (Slave/Receiver)
Data Byte Count = X
Beginning Byte N
Byte N + X - 1
ACK
ACK
ACK
REV G 12/14/07
(h)
(h)
(h)