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參數(shù)資料
| 型號： | 9148F-02LF |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 66.6 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | 0.300 INCH, SSOP-48 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 691K |
| 代理商： | 9148F-02LF |
5
ICS9148-02
CPU 3.3_2.5#
This Input pin controls the CPU and IOAPIC output buffer
strength for skew matching CPU and SDRAM outputs to
compensate for the external VDDL supply condition. It is
important to use this function when selecting power supply
requirements for VDDL1,2. A logic 0 (ground) will indicate
2.5V operation and a logic 1 will indicate 3.3V operation.
This pin has an internal pullup resistor to VDD.
PWR_DWN#
This is an asynchronous active Low Input pin used to Power
Down the device into a Low Power state by not removing the
power supply. The internal Clocks are disabled and the VCO
and Crystal are stopped. Powered Down will also place all
the Outputs in a low state at the end of their current cycle.
The latency of Power Down will not be greater than 3ms. The
I2C inputs will be Tri-Stated and the device will retain all
programming information. This input pin only valid when
MODE=0 (Power Management Mode)
CPU_STOP#
This is a synchronous active Low Input pin used to stop the
CPUCLK clocks in an active low state. All other Clocks
including SDRAM clocks will continue to run while this
function is enabled. The CPUCLKs will have a turn ON
latency of at least 3 CPU clocks. This input pin only valid
when MODE=0 (Power Management Mode)
PCI_STOP#
This is a synchronous active Low Input pin used to stop the
PCICLK clocks in an active low state. It will not effect
PCICLK_F nor any other outputs. This input pin only valid
when MODE=0 (Power Management Mode)
I2C
The SDATA and SCLOCK Inputs are use to program the
device. The clock generator is a slave-receiver device in the
I2C protocol. It will allow read-back of the registers. See
configuration map for register functions. The I2C
specification in Philips I2C Peripherals Data Handbook
(1996) should be followed.
Technical Pin Function Descriptions
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