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參數(shù)資料
| 型號： | C9812 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Low EMI Clock Generator for Intel 810E Chipset Systems |
| 中文描述： | 低EMI時鐘發(fā)生器芯片組為Intel 810E規(guī)定系統(tǒng) |
| 文件頁數(shù)： | 3/18頁 |
| 文件大?。?/td> | 279K |
| 代理商： | C9812 |
Low EMI Clock Generator for Intel
810E Chipset Systems
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07053 Rev. **
05/03/01
Page 3 of 18
APPROVED PRODUCT
C9812
Test Mode Function
Test Mode Functionality
SEL2
SEL1
x
0
SEL0
1
CPU
TCLK/2
SDRAM
TCLK/2
3V66
TCLK/3
Table 2
PCI
48 MHz
TCLK/2
REF
TCLK
IOAPIC
TCLK/6
TCLK/6
Note
:
TCLK is a test clock over driven on the XIN input during test mode.
Power Management Functions
Power Management on this device is controlled by a single pin, PD# (pin32). When PD# is high (default) the device is in
running and all signals are active.
When PD# is asserted (forced) low, the device is in shutdown (or in power down) mode and all power supplies (3.3V and
2.5V except for VDDA/pin 27) may be removed. When in power down, all outputs are synchronously stopped in a low
state (see Fig.2 below), all PLL’s are shut off, and the crystal oscillator is disabled. When the device is shutdown the I2C
function is also disabled.
Power Management Timing
100MHz
PCI
33MHz
SDRAM
CLOCK
REF
33MHz
Undefined
CPU
66MHz
30nS
0nS
IOAPIC
3V66
100MHz
20nS
10nS
40nS
50nS
PWRDN#
USB
14
.
3MHz
48MHz
Undefined
Undefined
Fig.2
Power Management Current
PD#
,
SEL[2..0]
(CPU Clock)
0XXX (Power down)
1010 (66MHz)
1011 (100MHz)
111X (133MHz)
Maximum 2.5 Volt Current
Consumption (VDD2.5 =2.625)
100 μA
70 mA
100 mA
133 mA
Table 3
Maximum 3.3 Volt Current Consumption
(VDD3.3 = 3.465 V)
200 μA
280 mA
280 mA
280 mA
When exiting the power down mode, the designer must supply power to the VDD pins first, a minimum of 200mS before
releasing the PD# pin high.
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