參數(shù)資料
型號(hào): CY2276A-31
廠商: Cypress Semiconductor Corp.
英文描述: PentiumII Clock Synthesizer/Driver for Desktop PCs with Intel 82440LX and 3SO- DIMMs(帶英特爾82440LX 和3SO-DIMM的應(yīng)用于桌上型PC機(jī)的奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器)
中文描述: PentiumII時(shí)鐘合成器/桌面電腦與英特爾82440LX和3SO - DIMM內(nèi)存(帶英特爾82440LX和3SO - DIMM內(nèi)存的應(yīng)用于桌上型電腦機(jī)的奔騰二時(shí)鐘合成器/驅(qū)動(dòng)器驅(qū)動(dòng)程序)
文件頁(yè)數(shù): 5/13頁(yè)
文件大?。?/td> 205K
代理商: CY2276A-31
CY2276A-21
CY2276A-31
5
Byte 1: CPU Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit
Description
Bit 7
IOCLK (Active/Inactive) (-21 ONLY)
USBCLK0 (Active/Inactive) (-31 ONLY)
Bit 6
USBCLK (Active/Inactive) (-21 ONLY)
USBCLK1 (Active/Inactive) (-31 ONLY)
Bit 5
(Reserved) drive to ‘0’
Bit 4
CPUCLK4 (Active/Inactive) (-31 ONLY)
Not available on -21
Bit 3
CPUCLK3 (Active/Inactive)
Bit 2
CPUCLK2 (Active/Inactive)
Bit 1
CPUCLK1 (Active/Inactive)
Bit 0
CPUCLK0 (Active/Inactive)
Byte 3: SDRAM Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit
Description
Bit 7
SDRAM7 (Active/Inactive)
Bit 6
SDRAM6 (Active/Inactive)
Bit 5
SDRAM5 (Active/Inactive)
Bit 4
SDRAM4 (Active/Inactive)
Bit 3
SDRAM3 (Active/Inactive)
Bit 2
SDRAM2 (Active/Inactive)
Bit 1
SDRAM1 (Active/Inactive)
Bit 0
SDRAM0 (Active/Inactive)
Byte 5: Peripheral Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit
Description
Bit 7
(Reserved drive to ‘0’)
Bit 6
(Reserved) drive to ‘0’
Bit 5
IOAPIC1 (Active/Inactive)
Bit 4
IOAPIC0 (Active/Inactive)
Bit 3
(Reserved) drive to ‘0’
Bit 2
(Reserved) drive to ‘0’
Bit 1
REF1 (Active/Inactive)(-31 ONLY)
Bit 0
REF0 (Active/Inactive)
Byte 2: PCI Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit
Description
Bit 7
(Reserved) drive to ‘0’
Bit 6
PCICLK6 (Active/Inactive)
Bit 5
PCICLK5 (Active/Inactive)
Bit 4
PCICLK4 (Active/Inactive)
Bit 3
PCICLK3 (Active/Inactive)
Bit 2
PCICLK2 (Active/Inactive)
Bit 1
PCICLK1 (Active/Inactive)
Bit 0
PCICLK0 (Active/Inactive)
Byte 4: SDRAM Active/Inactive Register
(1 = Active, 0 = Inactive), Default = Active
Bit
Description
Bit 7
SDRAM15 (Active/Inactive) (-21 ONLY)
Not available on -31
Bit 6
SDRAM14 (Active/Inactive) (-21 ONLY)
Not available on -31
Bit 5
SDRAM13 (Active/Inactive) (-21 ONLY)
Not available on -31
Bit 4
SDRAM12 (Active/Inactive)
Bit 3
SDRAM11 (Active/Inactive)
Bit 2
SDRAM10 (Active/Inactive)
Bit 1
SDRAM9 (Active/Inactive)
Bit 0
SDRAM8 (Active/Inactive)
Byte 6: Reserved, for future use
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CY2278A PentiumII Clock Synthesizer/Driver for Mobile PCs with Intel 82430TX and No SDRAM(帶英特爾82430TX和2個(gè)DIMM 或3個(gè)SO-DIMM 的應(yīng)用于移動(dòng)PC機(jī)的奔騰II6x86, K6 時(shí)鐘合成器/驅(qū)動(dòng)器)
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