ICS9UMS9633BI
Advance Information
ULTRA MOBILE PC CLOCK FOR INDUSTRIAL TEMPERATURE RANGE
General SMBus serial interface information for the ICS9UMS9633BI
How to Write:
How to Read:
• Controller (host) will send start bit.
• Controller (host) sends the write address D2(h)
• ICS clock will acknowledge
• 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 begining byte
location = N
• 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
• Controller (host) will send a separate start bit.
• Controller (host) sends the read address D3(h)
• ICS clock will acknowledge
• ICS clock will acknowledge each byte one at a time
• Controller (host) sends a Stop bit
• 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 Read Operation
Index Block Write Operation
Controller (Host)
Controller (Host)
ICS (Slave/Receiver)
ICS (Slave/Receiver)
starT bit
T
starT bit
T
Slave Address D2(h)
Slave Address D2(h)
WR
WRite
WR
WRite
ACK
ACK
ACK
ACK
ACK
ACK
Beginning Byte = N
Beginning Byte = N
Data Byte Count = X
Beginning Byte N
RT
Repeat starT
Slave Address D3(H)
RD
ReaD
ACK
Data Byte Count = X
Beginning Byte N
ACK
ACK
Byte N + X - 1
ACK
P
stoP bit
Byte N + X - 1
N
P
Not acknowledge
stoP bit
IDTTM/ICSTM Ultra Mobile PC Clock for Industrial Temperature Range
1451—01/20/09
12
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
