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952906BFLF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
4
Integrated
Circuit
Systems, Inc.
ICS952906A
1236A—08/06/07
General I
2
C serial interface information for the ICS952906A
How to Write:
• 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 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
How to Read:
• Controller (host) will send 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) will send a separate start bit.
• Controller (host) sends the read address D3
(H)
• 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
(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
ICS (Slave/Receiver)
T
WR
ACK
ACK
ACK
ACK
ACK
P
stoP bit
X Byte
Index Block Write Operation
Slave Address D2
(H)
Beginning Byte = N
WRite
starT bit
Controller (Host)
Byte N + X - 1
Data Byte Count = X
Beginning Byte N
T starT bit
WR WRite
RT Repeat starT
RD ReaD
Beginning Byte N
Byte N + X - 1
N Not acknowledge
PstoP bit
Slave Address D3
(H)
Index Block Read Operation
Slave Address D2
(H)
Beginning Byte = N
ACK
ACK
Data Byte Count = X
ACK
ICS (Slave/Receiver)
Controller (Host)
X Byte
ACK
ACK
5
Integrated
Circuit
Systems, Inc.
ICS952906A
1236A—08/06/07
Table1: QuadRom Frequency Selection Table
Bit4 Bit3 Bit2 Bit1 Bit0 CPU AGP PCI Spread
FS4FS3FS2FS1FS0 MHz MHz MHz %
0 0 0 0 0 0 0 100.00 66.67 33.33 0 to -0.5% Down
0 0 0 0 0 0 1 200.00 66.67 33.33 0 to -0.5% Down
0 0 0 0 0 1 0 133.33 66.67 33.33 0 to -0.5% Down
0 0 0 0 0 1 1 166.67 66.67 33.33 0 to -0.5% Down
0 0 0 0 1 0 0 200.00 66.67 33.33 0 to -0.5% Down
0 0 0 0 1 0 1 400.00 66.67 33.33 0 to -0.5% Down
0 0 0 0 1 1 0 266.67 66.67 33.33 0 to -0.5% Down
0000111
333.33 66.67 33.33 0 to -0.5% Down
0 0 0 1 0 0 0 100.99 67.33 33.66 0.25% Center
0 0 0 1 0 0 1 201.98 67.33 33.66 0.25% Center
0 0 0 1 0 1 0 134.65 67.33 33.66 0.25% Center
0001011
168.31 67.32 33.66 0.25% Center
0 0 0 1 1 0 0 115.00 76.67 38.33 No Spread
0 0 0 1 1 0 1 230.00 76.67 38.33 No Spread
0 0 0 1 1 1 0 153.33 76.66 38.33 No Spread
0001111
191.67 76.67 38.33 No Spread
0 0 1 0 0 0 0 100.00 66.66 33.33 0.25% Center
0 0 1 0 0 0 1 200.00 66.66 33.33 0.25% Center
0 0 1 0 0 1 0 133.33 66.66 33.33 0.25% Center
0 0 1 0 0 1 1 166.67 71.43 35.71 0.25% Center
0 0 1 0 1 0 0 200.00 66.66 33.33 0.25% Center
0 0 1 0 1 0 1 400.00 66.66 33.33 0.25% Center
0 0 1 0 1 1 0 266.67 66.66 33.33 0.25% Center
0010111
333.33 66.66 33.33 0.25% Center
0 0 1 1 0 0 0 105.00 69.99 35.00 No Spread
0 0 1 1 0 0 1 210.00 69.99 35.00 No Spread
0 0 1 1 0 1 0 140.00 69.99 35.00 No Spread
0011011
175.00 69.99 35.00 No Spread
0 0 1 1 1 0 0 110.00 73.33 36.66 No Spread
0 0 1 1 1 0 1 220.00 73.33 36.66 No Spread
0 0 1 1 1 1 0 146.66 73.33 36.66 No Spread
0011111
183.34 73.33 36.66 No Spread
Bit6 Bit5
6
Integrated
Circuit
Systems, Inc.
ICS952906A
1236A—08/06/07
Table1: QuadRom Frequency Selection Table (Continued)
Bit4 Bit3 Bit2 Bit1 Bit0 CPU AGP PCI Spread
FS4FS3FS2FS1FS0 MHz MHz MHz %
0 1 0 0 0 0 0 103.00 68.66 34.33 No Spread
0 1 0 0 0 0 1 206.00 68.66 34.33 No Spread
0 1 0 0 0 1 0 137.33 68.66 34.33 No Spread
0 1 0 0 0 1 1 171.67 68.66 34.33 No Spread
0 1 0 0 1 0 0 228.89 68.66 34.33 No Spread
0 1 0 0 1 0 1 412.00 68.66 34.33 No Spread
0 1 0 0 1 1 0 274.67 68.66 34.33 No Spread
0100111
343.33 68.66 34.33 No Spread
0 1 0 1 0 0 0 105.00 69.99 35.00 No Spread
0 1 0 1 0 0 1 210.00 69.99 35.00 No Spread
0 1 0 1 0 1 0 140.00 69.99 35.00 No Spread
0 1 0 1 0 1 1 175.00 69.99 35.00 No Spread
0 1 0 1 1 0 0 233.33 69.99 35.00 No Spread
0 1 0 1 1 0 1 420.00 69.99 35.00 No Spread
0 1 0 1 1 1 0 280.00 69.99 35.00 No Spread
0101111
350.00 69.99 35.00 No Spread
0 1 1 0 0 0 0 107.00 71.33 35.66 No Spread
0 1 1 0 0 0 1 214.00 71.33 35.66 No Spread
0 1 1 0 0 1 0 142.66 71.33 35.66 No Spread
0 1 1 0 0 1 1 178.34 71.33 35.66 No Spread
0 1 1 0 1 0 0 237.78 71.33 35.66 No Spread
0 1 1 0 1 0 1 428.00 71.33 35.66 No Spread
0 1 1 0 1 1 0 285.34 71.33 35.66 No Spread
0110111
356.66 71.33 35.66 No Spread
0 1 1 1 0 0 0 110.00 73.33 36.66 No Spread
0 1 1 1 0 0 1 220.00 73.33 36.66 No Spread
0 1 1 1 0 1 0 146.66 73.33 36.66 No Spread
0 1 1 1 0 1 1 183.34 73.33 36.66 No Spread
0 1 1 1 1 0 0 244.44 73.33 36.66 No Spread
0 1 1 1 1 0 1 440.00 73.33 36.66 No Spread
0 1 1 1 1 1 0 293.34 73.33 36.66 No Spread
0111111
366.66 73.33 36.66 No Spread
Bit6 Bit5
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

952906BFLF

Mfr. #:
Buy 952906BFLF
Manufacturer:
IDT
Description:
Clock Generators & Support Products PC MAIN CLOCK
Lifecycle:
New from this manufacturer.
Delivery:
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