mk1493-14 Integrated Device Technology, mk1493-14 Datasheet - Page 4

• Manufacturer Part Number: mk1493-14
• Description: Spread Spectrum Clock Generator
• Manufacturer: Integrated Device Technology

General SMBus Serial Interface
How to Write:
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IDT™ / ICS™ SPREAD SPECTRUM CLOCK GENERATOR
MK1493-14
SPREAD SPECTRUM CLOCK GENERATOR
Controller (host) sends a start bit
Controller (host) sends the write address D2
ICS clock will acknowledge
Controller (host) sends the beginning 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
(see Note 2)
ICS clock will acknowledge each byte one at a time
Controller (host) sends a Stop bit
WR
Data Byte Count = X
Slave Address D2
Beginning Byte = N
Beginning Byte = N
T
P
Controller (Host)
Byte N + X - 1
Index Block Write Operation
O
O
O
starTbit
stoP bit
WRite
(H)
X
B
Y
T
E
.
ICS(Slave/Receiver)
ACK
ACK
ACK
ACK
ACK
(H)
O
O
O
4
How to Read:
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Controller (host) sends a start bit
Controller (host) sends the write address D2
ICS clock will acknowledge
Controller (host) sends the beginning byte location =N
ICS clock will acknowledge
Controller (host) will send a separate start bit
Controller (host) sends the read address D3
ICS clock will acknowledge
Controller (host) sends the data byte count = X
ICS clock sends Byte N + X - 1
ICS clock sends Byte 0 through byte X (if X
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
WR
RD
RT
N
P
T
Slave Address D2
Slave Address D3
Beginning Byte = N
Controller (Host)
Index Block Read Operation
Not acknowledge
ACK
ACK
Repeat starT
O
O
O
starTbit
stoP bit
ReaD
WRite
(H)
(H)
X
B
Y
T
E
.
ICS(Slave/Receiver)
Data Bye Count = X
MK1493-14
Beginning Byte N
Byte N + X - 1
(H)
ACK
ACK
ACK
(H)
(H)
O
O
O
was written to
REV A 082205
SSCG