CY2277APVC-3 Cypress Semiconductor Corporation., CY2277APVC-3 Datasheet
CY2277APVC-3
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CY2277APVC-3 Summary of contents
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Pentium /II, 6x86, K6 Clock Synthesizer/Driver for Desktop/ Mobile PCs with Intel Features • Mixed 2.5V and 3.3V operation • Complete clock solution to meet requirements of Pen- tium ® , Pentium ® II, 6x86 motherboards ...
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Pin Summary Name Pins V 7, 15, 21, 28, 34 DDQ3 V 46 DDQ2 V 40 DDCPU AV 25 10, 17, 24, 31, 37, 43 Ground SS [2] XTALIN 4 [2] XTALOUT 5 MODE 6 SEL ...
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Function Table (-1, -1M, -7M, -12, -12M, -12I) CPUCLK[0:3] SEL XTALIN SDRAM[0:7] 0 14.318 MHz 60.0 MHz 1 14.318 MHz 66.67 MHz Function Table (-3) CPUCLK[0:3] SEL XTALIN SDRAM[0:7] 0 14.318 MHz 33.33 MHz 1 14.318 MHz 66.67 MHz Actual ...
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Power Management Logic CPU_STOP PCI_STOP PWR_DWN Serial Configuration Map • The Serial bits will be read by the clock driver in the following order: Byte ...
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Byte 1: CPU, 24/48 MHz Active/Inactive Register (1 = Active Inactive), Default = Active Bit Pin # Description Bit 7 23 48/24 MHz (Active/Inactive) Bit 6 22 48/24 MHz (Active/Inactive) Bit 5 -- (Reserved) drive to ‘0’ Bit ...
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Operating Conditions Parameter Analog and Digital Supply Voltage DD DDQ3 V 2.5V CPU Supply Voltage (-1,-1M, -3, -7M) DDCPU 2.5V CPU Supply Voltage (-12, -12M, -12I) 3.3V CPU Supply Voltage V 2.5V IOAPIC Supply Voltage (-1,-1M, ...
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Electrical Characteristics (-1, -3, -12) Parameter Description Notes: 6. Electrical parameters are guaranteed with these operating conditions. 7. Guaranteed by design and characterization. Not 100% tested in production. 8. Power supply current will vary with number of outputs which are ...
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Electrical Characteristics (-12I) Parameter Description V High-level Input Voltage IH V Low-level Input Voltage IL V Low-level Input Voltage ILiic V High-level Output Voltage OH V Low-level Output Voltage OL V High-level Output Voltage OH V Low-level Output Voltage OL ...
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Switching Characteristics (-1, -3) Parameter Output Description t CPUCLK Output Duty Cycle 1 SDRAM USBCLK IOCLK REF [0,1] IOAPIC t PCI Output Duty Cycle 1 t CPUCLK, CPU and IOAPIC Clock 2 IOAPIC Rising and Falling Edge Rate t PCI ...
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Switching Characteristics (-1M, -7M, -12M) Parameter Output Description t CPUCLK Output Duty Cycle 1 SDRAM USBCLK REF [0,1] IOAPIC t PCI Output Duty Cycle 1 t CPUCLK, CPU and IOAPIC Clock 2 IOAPIC Rising and Falling Edge Rate t PCI ...
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Switching Characteristics (-12) Parameter Output Description t All Clocks Output Duty Cycle 1 t CPUCLK, CPU and IOAPIC Clock 2 IOAPIC Rising and Falling Edge Rate t PCI PCI Clock Rising and 2 Falling Edge Rate t REF0 REF0 Clock ...
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Switching Characteristics (-12I) Parameter Output Description t All Clocks Output Duty Cycle 1 t CPUCLK, CPU and IOAPIC Clock 2 IOAPIC Rising and Falling Edge Rate t PCI PCI Clock Rising and 2 Falling Edge Rate t REF0 REF0 Clock ...
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Timing Requirement for the SMBus Parameter t SCLK Clock Frequency 10 t Time the bus must be free before a new transmission can start 11 t Hold time start condition. After this period the first clock pulse is generated. 12 ...
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Switching Waveforms (continued) CPU-CPU Clock Skew CLK CLK t 5 CPU-SDRAM Clock Skew CPUCLK SDRAM t 7 CPU-PCI Clock Skew CPUCLK PCICLK t 6 [13, 14] CPU_STOP CPUCLK (Internal) PCICLK (Internal) PCICLK (Free-Running) CPU_STOP CPUCLK (External) Notes: 13. CPUCLK on ...
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Switching Waveforms (continued) [15, 16] PCI_STOP CPUCLK (Internal) PCICLK (Internal) PCICLK (Free-Running) PCI_STOP PCICLK (External) PWR_DOWN CPUCLK (Internal) PCICLK (Internal) PWR_DWN# CPUCLK (External) PCICLK (External) VCO Crystal Shaded section on the VCO and Crystal waveforms indicates that the VCO and ...
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Application Information Clock traces must be terminated with either series or parallel termination normally done. Application Circuit Summary • A parallel-resonant crystal should be used as the reference to the clock generator. The operating frequency and C this ...
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... Test Circuit Note: All capacitors should be placed as close to each pin as possible. Ordering Information Ordering Code CY2277APVC-1 CY2277APAC-1M CY2277APVC-3 CY2277APAC-7M CY2277APVC-12 CY2277APAC-12M CY2277APVI-12 Intel and Pentium are registered trademarks of Intel Corporation. All product or company names mentioned in this document are the trademarks of their respective holders. ...
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Package Diagrams 48-Lead Thin Shrunk Small Outline Package, Type mm) Z48 Document #: 38-07332 Rev. *A © Cypress Semiconductor Corporation, 2001. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes ...
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Document Title: CY2277A Pentium and 2 DIMMs or 3 SO-DIMMs Document Number: 38-07332 Issue REV. ECN NO. Date ** 111731 12/15/01 *A 121855 12/14/02 Document #: 38-07332 Rev. *A ® /II, 6x86, K6 Clock Synthesizer/Driver for Desktop/Mobile PCs with Intel ...