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參數(shù)資料
| 型號： | 950811YGT |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 |
| 封裝： | 6.10 MM, 0.50 MM PITCH, MO-153, TSSOP-56 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大小： | 283K |
| 代理商： | 950811YGT |
5
ICS950811
0482E—08/09/07
Byte 0: Control Register
Byte 1: Control Register
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Notes:
1. R= Read only RW= Read and Write
2. PWD = Power on Default
3. The purpose of this bit is to allow a system designer to implement PCI_STOP functionality in one of two ways.
Wither the system designer can choose to use the externally provided PCI_STOP# pin to assert and de-assert
PCI_STOP functionality via I
2C Byte 0 Bit 3.
In Hardware mode it is not allowed to write to the I
2C Byte 0 Bit3. In Software mode it is not allowed to pull the
external PCI_STOP pin low. This avoids the issues related with Hardware started and software stopped
PCI_STOP conditions. The clock chip is to be operated in the Hardware or Software PCI_STOP mode ONLY, it
is not allowed to mix these modes.
In Hardware mode the I
2C byte 0 Bit 3 is R/W and should reflect the status of the part. Whether or not the chip
is in PCI_STOP mode.
Functionality PCI_STOP mode should be entered when [(PCI_STOP#=0) or (I
2C Byte 0 Bit 3 = 0)].
4. For disabled clocks, they stop low for single ended clocks. Differential CPU clocks stop with CPUCLKT at high,
CPUCLKC off, and external resistor termination will bring CPUCLKC low.
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