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參數(shù)資料
| 型號： | CY28378OC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | FTG for Pentium 4 and Intel 845 Series Chipset |
| 中文描述： | 200.4 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁數(shù)： | 5/22頁 |
| 文件大?。?/td> | 174K |
| 代理商： | CY28378OC |
CY28378
Document #: 38-07519 Rev. **
Page 5 of 22
Serial Data Interface
To enhance the flexibility and function of the clock synthesizer,
a two-signal serial interface is provided. Through the Serial
Data Interface (SDI), various device functions such as
individual clock output buffers, etc. can be individually enabled
or disabled.
The register associated with the SDI initializes to it’s default
setting upon power-up, and therefore use of this interface is
optional. Clock device register changes are normally made
upon system initialization, if any are required. The interface
can also be used during system operation for power
management functions.
Data Protocol
The clock driver serial protocol accepts byte write, byte read,
block write and block read operation from the controller. For
block write/read operation, the bytes must be accessed in
sequential order from lowest to highest byte (most significant
bit first) with the ability to stop after any complete byte has
been transferred. For byte write and byte read operations, the
system controller can access individual indexed bytes. The
offset of the indexed byte is encoded in the command code,
as described in
Table 3
.
The block write and block read protocol is outlined in
Table 4
while
Table 5
outlines the corresponding byte write and byte
read protocol.
The slave receiver address is 11010010 (D2h).
Table 3. Command Code Definition
Bit
Descriptions
7
0 = Block read or block write operation
1 = Byte read or byte write operation
Byte offset for byte read or byte write operation. For block read or block write operations, these
bits should be ‘0000000’.
6:0
Table 4. Block Read and Block Write Protocol
Block Write Protocol
Bit
1
Start
2:8
Slave address – 7 bits
9
Write = 0
10
Acknowledge from slave
11:18
Command Code – 8 Bit
'00000000' stands for block operation
19
Acknowledge from slave
20:27
Byte Count – 8 bits
28
Acknowledge from slave
29:36
Data byte 1 – 8 bits
37
Acknowledge from slave
38:45
Data byte 2 – 8 bits
46
Acknowledge from slave
....
......................
....
Data Byte (N–1) –8 bits
....
Acknowledge from slave
....
Data Byte N –8 bits
....
Acknowledge from slave
....
Stop
Block Read Protocol
Description
Bit
1
2:8
9
10
11:18
Description
Start
Slave address – 7 bits
Write = 0
Acknowledge from slave
Command Code – 8 Bit
'00000000' stands for block operation
Acknowledge from slave
Repeat start
Slave address – 7 bits
Read = 1
Acknowledge from slave
Byte count from slave – 8 bits
Acknowledge
Data byte from slave – 8 bits
Acknowledge
Data byte from slave – 8 bits
Acknowledge
Data bytes from slave/Acknowledge
Data byte N from slave – 8 bits
Not Acknowledge
Stop
19
20
21:27
28
29
30:37
38
39:46
47
48:55
56
....
....
....
....
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY28378OCT | FTG for Pentium 4 and Intel 845 Series Chipset |
| CY28400 | 100-MHz Differential Buffer for PCI Express and SATA |
| CY28400OC | 100-MHz Differential Buffer for PCI Express and SATA |
| CY28400OCT | 100-MHz Differential Buffer for PCI Express and SATA |
| CY28401 | 100-MHz Differential Buffer for PCI Express and SATA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY28378OCT | 制造商:SPECTRALINEAR 制造商全稱:SPECTRALINEAR 功能描述:FTG for Pentium 4㈢ and Intel㈢ 845 Series Chipset |
| CY28378OXC | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 Sys Clk Pentium 4 & Intel Brookdale 845 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| CY28378OXCT | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 Sys Clk Pentium 4 & Intel Brookdale 845 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| CY28381 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:High-Performance SiS645DX/648DX/650/651 Intel Pentium 4 Clock Synthesizer |
| CY28381OC | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Cypress Semiconductor 功能描述: |
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