CY28339 Intel CK408 Mobile Clock Synthesizer Features • Compliant with Intel® CK 408 rev 1.1 Mobile Clock Synthesizer specifications • 3.3V power supply • Two differential CPU clocks • Nine copies of PCI clocks • Three copies configurable PCI free-running clocks • Two 48 MHz clocks (USB, DOT) • Five/six copies of 3V66 clocks • • • • One VCH clock One reference clock at 14.318 MHz SMBus support with read-back capabilities Ideal Lexmark profile Spread Spectrum electromagnetic interference (EMI) reduction • Dial-a-Frequency™ features • Dial-a-dB™ features • 48-pin TSSOP package Table 1. Frequency Table[1] S2 S1 CPU (1:2) 3V66 66BUFF(0:2)/ 3V66(0:4) 66IN/3V66–5 PCIF, PCI REF USB/ DOT 1 0 100M 66M 66IN 66-MHz clock input 66IN/2 14.318M 48M 1 1 133M 66M 66IN 66-MHZ clock input 66IN/2 14.318M 48M 0 0 100M 66M 66M 66M 33 M 14.318M 48M 0 1 133M 66M 66M 66M 33 M 14.318M 48M M 0 TCLK/2 TCLK/4 TCLK/4 TCLK/4 TCLK/8 TCLK TCLK/2 Block Diagram X1 X2 XTAL OSC Pin Configuration VDD_REF PWR REF Top View PLL Ref Freq PLL 1 S1:2 VTT_PWRGD## CPU_STOP# 48 VDD_REF XOUT 2 47 REF GND_REF 3 46 S1 VDD_CPU CPUT1:2 PCI7 4 45 PWR Stop Clock Control CPU_STOP# PCI8 5 44 VDD_CPU CPUC1:2 PCIF 6 43 CPUT1 GND_PCI 7 42 CPUC1 VDD_PCI PCIF PCI0 8 41 PWR GND_CPU PCI1 40 VDD_CPU PCI0:2 9 Stop Clock Control PCI2 39 CPUT2 PCI4:8 10 VDD_PCI 11 38 CPUC2 PCI4 37 IREF PCI5 12 13 PCI_STOP# /2 36 S2 PCI6 14 35 USB_48MHz VDD_3V66 GND_3V66 15 34 DOT_48MHz 16 33 66BUFF0/3V66_2 66BUFF1/3V66_3 66BUFF2/3V66_4 17 32 VDD_48 MHz GND_48 MHz 18 31 19 30 VDD_3V66 PWR 3V66_0:1 3V66_2:4/ 66BUFF0:2 PWR 3V66_5/ 66IN PLL 2 SDATA SCLK 3V66_1/VCH 66IN/3V66_5 20 29 PCI_STOP# 3V66_0 USB (48MHz) PD# 21 28 VDD_3V66 DOT (48MHz) VDD_CORE 22 27 GND_CORE VTT_PWRGD# 23 26 GND_3V66 SCLK 24 25 SDATA VDD_48MHz PWR CY28339 1 Divider Network Gate PD# XIN VCH_CLK/ 3V66_1 SMBus Logic Note: 1. TCLK is a test clock driven on the XTAL_IN input during test mode. M = driven to a level between 1.0V and 1.8V. If the S2 pin is at a M level during power-up, a 0 state will be latched into the device’s internal state register. Cypress Semiconductor Corporation Document #: 38-07507 Rev. *A • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised June 25, 2004 CY28339 Pin Definitions Pin Number Name I/O Description 47 REF0 3.3V 14.318-MHz clock output. 1 XIN 14.318-MHz crystal input. 2 XOUT 14.318-MHz crystal input. 43, 42, 39, 38 CPUT1,CPUC1 CPUT2, CPUC2 Differential CPU clock outputs. 29 3V66_0 3.3V 66-MHz clock output. 31 3V66_1/VCH 3.3V selectable through SMBus to be 66 MHz or 48 MHz. 20 66IN/3V66_5 66-MHz input to buffered 66BUFF and PCI or 66-MHz clock from internal VCO. 17, 18, 19 66BUFF [2:0] /3V66 [4:2] 66-MHz buffered outputs from 66Input or 66-MHz clocks from internal VCO. 6 PCIF 33 MHz clocks divided down from 66Input or divided down from 3V66; PCIF default is free-running. 8, 9, 10, 12, 13, 14, 4, 5 PCI [0:2] PCI [4:6] PCI [7:8] PCI clock outputs divided down from 66Input or divided down from 3V66; PCI [7:8] are configurable as free-running PCI through SMBus.[2] 35 USB_48M Fixed 48-MHz clock output. 34 DOT_48M Fixed 48-MHz clock output. 36 S2 Special 3.3V three-level input for Mode selection. 46 S1 3.3V LVTTL inputs for CPU frequency selection. 37 IREF A precision resistor is attached to this pin which is connected to the internal current reference. 21 PD# 3.3V LVTTL input for Power_Down# (active LOW). 30 PCI_STOP# 3.3V LVTTL input for PCI_STOP# (active LOW). 45 CPU_STOP# 3.3V LVTTL input for CPU_STOP# (active LOW). 24 VTT_PWRGD# 3.3V LVTTL input is a level-sensitive strobe used to determine when S[2:1] inputs are valid and OK to be sampled (Active LOW). Once VTT_PWRGD# is sampled LOW, the status of this input will be ignored. 25 SDATA SMBus-compatible SDATA. 26 SCLK SMBus-compatible SCLK. 11, 15, 28, 40, 44, 48 VDD_PCI, VDD_3V66, VDD_CPU,VDD_RE F 3.3V power supply for outputs. 33 VDD_48 MHz 3.3V power supply for 48 MHz. 22 VDD_CORE 3.3V power supply for phase-locked loop (PLL). 3, 7, 16, 27, 32, 41 GND_REF, GND_PCI, GND_3V66, GND_IREF, GND_CPU Ground for outputs. 23 GND_CORE Ground for PLL. Note: 2. PCI3 is internally disabled and is not accessible. Document #: 38-07507 Rev. *A Page 2 of 18 CY28339 Two-Wire SMBus Control Interface Serial Control Registers The two-wire control interface implements a Read/Write slave only interface according to SMBus specification. Following the acknowledge of the Address Byte, two additional bytes must be sent: The device will accept data written to the D2 address and data may read back from address D3. It will not respond to any other addresses, and previously set control registers are retained as long as power in maintained on the device. 1. “Command code“ byte 2. “Byte count” byte. Although the data (bits) in the command is considered “don’t care,” it must be sent and will be acknowledged. After the Command Code and the Byte Count have been acknowledged, the sequence (Byte 0, Byte 1, and Byte 2) described below will be valid and acknowledged. Byte 0: CPU Clock Register[3,4] Bit @Pu p Name 7 0 Spread Spectrum Enable. 0 = Spread Off, 1 = Spread On. This is a Read and Write control bit. 6 0 CPU Clock Power-down Mode Select. 0 = Drive CPUT to 2x IREF and drive CPUC LOW 1 = Tri-state all CPU outputs. This is only applicable when PD# is LOW. It is not applicable to CPU_STOP#. 5 0 3V66_1/VC H 4 Description 3V66_1/VCH Frequency Select 0 = 66M selected, 1 = 48M selected. This is a Read and Write control bit. Reserved 3 HW PCI_STOP# Reflects the current value of the internal PCI_STOP# function when read. Internally PCI_STOP# is a logical AND function of the internal SMBus register bit and the external PCI_STOP# pin. 2 HW S2 Frequency Select Bit 2. Reflects the value of S2. This bit is Read-only. 1 HW S1 Frequency Select Bit 1. Reflects the value of S1. This bit is Read-only. 0 1 Reserved Byte 1: CPU Clock Register Bit @Pu p Name Description 7 1 6 0 CPUT1, CPUC1 CPUT/C Output Functionality Control when CPU_STOP# is asserted. CPUT2, CPUC2 0 = Drive CPUT to 6x IREF and drive CPUC LOW 1 = three-state all CPU outputs. This bit will override Byte0,Bit6 such that even if it is 0, when PD# goes LOW the CPU outputs will be three-stated. 5 0 CPUT2, CPUC2 CPUT/C2 Functionality Control when CPU_STOP# is asserted. 0 = Stopped LOW,1 = Free Running. This is a Read and Write control bit. 4 0 CPUT1, CPUC1 CPUT/C1 Functionality Control When CPU_STOP# is asserted. 0 = Stopped LOW, 1 = Free Running. This is a Read and Write control bit. 3 0 2 1 CPUT2, CPUC2 CPUT/C2 Output Control. 0 = disable, 1 = enabled. This is a Read and Write control bit. 1 1 CPUT1, CPUC1 CPUT/C1 Output Control. 0 = disable, 1 = enabled. This is a Read and Write control bit. 0 1 Reserved Reserved Reserved Notes: 3. PU = internal pull-up. PD = internal pull-down. T = tri-level logic input with valid logic voltages of LOW = < 0.8V, T = 1.0 – 1.8V and HIGH = > 2.0V. 4. The “Pin#” column lists the relevant pin number where applicable. The “@Pup” column gives the default state at power-up. Document #: 38-07507 Rev. *A Page 3 of 18 CY28339 Byte 2:PCI Clock Control Register (all bits are Read and Write functional) Bi t @Pu p Nam e Description 7 0 REF REF Output Control. 0 = high strength, 1 = low strength. 6 1 PCI6 PCI6 Output Control. 0 = forced LOW, 1 = enabled 5 1 PCI5 PCI5 Output Control. 0 = forced LOW, 1 = enabled 4 1 PCI4 PCI4 Output Control. 0 = forced LOW, 1 = enabled 3 1 2 1 PCI2 PCI2 Output Control. 0 = forced LOW, 1 = enabled 1 1 PCI1 PCI1 Output Control. 0 = forced LOW, 1 = enabled 0 1 PCI0 PCI0 Output Control. 0 = forced LOW, 1 = enabled Reserved Byte 3: PCIF Clock and 48M Control Register (all bits are Read and Write functional) Bit @Pu p Name Description 7 1 DOT_48 M DOT_48M Output Control. 0 = forced LOW, 1 = enabled 6 1 USB_48 M USB_48M Output Control. 0 = forced LOW,1 = enabled 5 0 PCIF PCI_STOP# Control of PCIF. 0 = Free Running, 1 = Stopped when PCI_STOP# is asserted. 4 1 PCI8 PCI_STOP# Control of PCI8. 0 = Free Running, 1 = Stopped when PCI_STOP# is asserted. 3 1 PCI7 PCI_STOP# Control of PCI7. 0 = Free Running, 1 = Stopped when PCI_STOP# is asserted. 2 1 PCIF PCIF Output Control. 0 = forced LOW, 1 = running 1 1 PCI_8 PCI_8 Output Control. 0 = forced LOW, 1 = running 0 1 PCI_7 PCI_7 Output Control. 0 = forced LOW, 1 = running Byte 4: Control Register (all bits are Read and Write functional) Bit @Pup Name Description 7 0 SS2 Spread Spectrum Control Bit. 0 = down spread, 1 = center spread). 6 0 Reserved. Set = 0. 5 1 3V66_0 4 1 3V66_1/VCH 3 1 3V66_5 2 1 19 66BUFF2/3V66_4 Output Enable. 0 = disable, 1 = enabled 1 1 18 66BUFF1/3V66_3 Output Enable. 0 = disable, 1 = enabled 0 1 66BUFF0/3V66_2 66BUFF0/3V66_2 Output Enable. 0 = disable, 1 = enabled 3V66_0 Output Enable. 0 = disable, 1 = enabled 3V66_1/VCH Output Enable. 0 = disable, 1 = enabled 3V66_5 Output Enable. 0 = disable, 1 = enabled Byte 5:Clock Control Register (all bits are Read and Write functional) Bit @Pup 7 0 SS1 Spread Spectrum Control Bit. 6 1 SS0 Spread Spectrum Control Bit. 5 0 66IN to 66M delay Control MSB. 4 0 66IN to 66M delay Control LSB. 3 0 2 0 1 0 0 0 Document #: 38-07507 Rev. *A Name Description Reserved. Set = 0. DOT_48M DOT_48M Edge Rate Control. When set to 1, the edge is slowed by 15%. Reserved. Set = 0. USB_48M USB_48M edge rate control. When set to 1, the edge is slowed by 15%. Page 4 of 18 CY28339 Byte 6: Silicon Signature Register[5] (all bits are Read-only) Bit @Pup 7 0 6 0 5 0 4 1 3 0 2 0 1 1 0 1 Name Description Revision = 0001 Vendor Code = 0011 Byte 7: Reserved Register Bit @Pup Name Description 7 0 Reserved. Set = 0. 6 0 Reserved. Set = 0. 5 0 Reserved. Set = 0. 4 0 Reserved. Set = 0. 3 0 Reserved. Set = 0. 2 0 Reserved. Set = 0. 1 0 Reserved. Set = 0. 0 0 Reserved. Set = 0. Byte 8: Dial-a-Frequency Control Register N Bit @Pup 7 0 Name Description Reserved. Set = 0. 6 0 N6, MSB 5 0 N5 4 0 N4 3 0 N3 2 0 N2 1 0 N3 0 0 N0, LSB These bits are for programming the PLL’s internal N register. This access allows the user to modify the CPU frequency at very high resolution (accuracy). All other synchronous clocks (clocks that are generated from the same PLL, such as PCI) remain at their existing ratios relative to the CPU clock. Byte 9: Dial-a-Frequency Control Register R Bit @Pup 7 0 Name Description Reserved. Set = 0. 6 0 R5, MSB 5 0 R4 4 0 R3 3 0 R2 2 0 R1 1 0 R0 0 0 DAF_ENB These bits are for programming the PLL’s internal R register. This access allows the user to modify the CPU frequency at very high resolution (accuracy). All other synchronous clocks (clocks that are generated from the same PLL, such as PCI) remain at their existing ratios relative to the CPU clock. R and N register mux selection. 0 = R and N values come from the ROM. 1 = data is loaded from DAF (SMBus) registers. Note: 5. When writing to this register, the device will acknowledge the Write operation, but the data itself will be ignored. Document #: 38-07507 Rev. *A Page 5 of 18 CY28339 Dial-a-Frequency Features Special Functions SMBus Dial-a-Frequency feature is available in this device via Byte8 and Byte9. PCIF and IOAPIC Clock Outputs S(1:0) P 00 32005333 The PCIF clock outputs are intended to be used, if required, for systems IOAPIC clock functionality. Any two of the PCIF clock outputs can be used as IOAPIC 33-Mhz clock outputs. They are 3.3V outputs will be divided down via a simple resistive voltage divider to meet specific system IOAPIC clock voltage requirements. In the event that these clocks are not required, they can be used as general PCI clocks or disabled via the assertion of the PCI_STOP# pin. 01 48008000 3V66_1/VCH Clock Output 10 96016000 11 64010667 The 3V66_1/VCH pin has a dual functionality that is selectable via SMBus. P is a large-value PLL constant that depends on the frequency selection achieved through the hardware selectors (S1, S0). P value may be determined from Table 2. Table 2. P Value Configured as DRCG (66M), SMBus Byte0, Bit 5 = “0” Dial-a-dB Features SMBus Dial-a-dB feature is available in this device via Byte8 and Byte9. The default condition for this pin is to power-up in a 66M operation. In 66M operation this output is SSCG-capable and when spreading is turned on, this clock will be modulated. Spread Spectrum Clock Generation (SSCG) Configured as VCH (48M), SMBus Byte0, Bit 5 = “1” Spread Spectrum is a modulation technique used to minimizing EMI radiation generated by repetitive digital signals. A clock presents the greatest EMI energy at the center frequency it is generating. Spread Spectrum distributes this energy over a specific and controlled frequency bandwidth therefore causing the average energy at any one point in this band to decrease in value. This technique is achieved by modulating the clock away from its resting frequency by a certain percentage (which also determines the amount of EMI reduction). In this device, Spread Spectrum is enabled by setting specific register bits in the SMBus control bytes. Table 3 is a listing of the modes and percentages of Spread Spectrum modulation that this device incorporates. In this mode, output is configured as a 48-Mhz non-spread spectrum output that is phase-aligned with other 48M outputs (USB and DOT) to within 1-ns pin-to-pin skew. The switching of 3V66_1/VCH into VCH mode occurs at system power-on. When the SMBus Bit 5 of Byte 0 is programmed from a “0” to a “1,” the 3V66_1/VCH output may glitch while transitioning to 48M output mode. PD# (Power-down) Clarification SS2 SS1 SS0 Spread Mode Spread% 0 0 0 Down +0.00, –0.25 The PD# (power-down) pin is used to shut off all clocks prior to shutting off power to the device. PD# is an asynchronous active LOW input. This signal is synchronized internally to the device powering down the clock synthesizer. PD# is an asynchronous function for powering up the system. When PD# is LOW, all clocks are driven to a LOW value and held there and the VCO and PLLs are also powered down. All clocks are shut down in a synchronous manner so has not to cause glitches while transitioning to the LOW “stopped” state. 0 0 1 Down +0.00, –0.50 PD# Assertion 0 1 0 Down +0.00, –0.75 0 1 1 Down +0.00, –1.00 1 0 0 Center +0.13, –0.13 1 0 1 Center +0.25, –0.25 1 1 0 Center +0.37, –0.37 1 1 1 Center +0.50, –1.50 When PD# is sampled LOW by two consecutive rising edges of the CPUC clock, then on the next HIGH-to-LOW transition of PCIF, the PCIF clock is stopped LOW. On the next HIGH-to-LOW transition of 66BUFF, the 66BUFF clock is stopped LOW. From this time, each clock will stop LOW on its next HIGH-to-LOW transition, except the CPUT clock. The CPU clocks are held with the CPUT clock pin driven HIGH with a value of 2 × Iref, and CPUC undriven. After the last clock has stopped, the rest of the generator will be shut down. Table 3. Spread Spectrum 3V66-0 Tpci PCI PCI_F Figure 1. Unbuffered Mode – 3V66_0 to PCI and PCIF Phase Relationship Document #: 38-07507 Rev. *A Page 6 of 18 CY28339 PWRDWN# CPUT 133MHz CPUC 133MHz PCI 33MHz 3V66 USB 48MHz REF 14.318MHz Figure 2. Power-down Assertion Timing Waveforms – Unbuffered Mode 6 6 B u ff P C IF PW RDW N# CPU 133M Hz CPU# 133M Hz 3V66 6 6 In USB 48M Hz R E F 1 4 .3 1 8 M H z Figure 3. Power-down Assertion Timing Waveforms Figure – Buffered Mode Document #: 38-07507 Rev. *A Page 7 of 18 CY28339 PD# Deassertion The power-up latency between PD# rising to a valid logic ‘1’ level and the starting of all clocks is less than 3.0 ms. <1.8m S 30uS m in 400uS m ax 66Buff1 / GMCH 66Buff PCIF / APIC 33MHz PCI 33M Hz PW RDW N# CPU 133MHz CPU# 133M Hz 3V66 66In USB 48MHz REF 14.318MHz Figure 4. Power-down Deassertion Timing Waveforms – Buffered Mode CPU_STOP# Clarification CPU_STOP# Assertion The CPU_STOP# signal is an active LOW input used to synchronously stop and start the CPU output clocks while the rest of the clock generator continues to function. When CPU_STOP# pin is asserted, all CPUT/C outputs that are set with the SMBus configuration to be stoppable via assertion of CPU_STOP# will be stopped after being sampled by two falling CPUT/C clock edges. The final state of the stopped CPU signals is CPUT = HIGH and CPU0C = LOW. There is no change to the output drive current values during the stopped state. The CPUT is driven HIGH with a current value equal to (Mult 0 “select”) × (Iref), and the CPUC signal will not be driven. Due to external pull-down circuitry CPUC will be LOW during this stopped state. CPU_STP# CPUT CPUC CPUT CPUC Figure 5. CPU_STOP# Assertion Waveform Document #: 38-07507 Rev. *A Page 8 of 18 CY28339 CPU_STOP# Deassertion The deassertion of the CPU_STOP# signal will cause all CPUT/C outputs that were stopped to resume normal operation in a synchronous manner (meaning that no short or stretched clock pulses will be produces when the clock resumes). The maximum latency from the deassertion to active outputs is no more than two CPUC clock cycles. CPU_STP# CPUT CPUC CPUT CPUC Figure 6. CPU_STOP# De-assertion Waveform Three-state Control of CPU Clocks Clarification During CPU_STOP# and PD# modes, CPU clock outputs may be set to driven or undriven (tri-state) by setting the corresponding SMBus entry in Bit6 of Byte0 and Bit6 of Byte1. PCI_STOP# Assertion The PCI_STOP# signal is an active LOW input used for synchronous stopping and starting the PCI outputs while the rest of the clock generator continues to function. The set-up time for capturing PCI_STOP# going LOW is 10 ns (tsetup) (see Figure 2.) The PCIF clocks will not be affected by this pin if their control bits in the SMBus register are set to allow them to be free running. t setup P C I_S TP # P C IF 33M P C I 33M Figure 7. PCI_STOP# Assertion Waveform PCI_STOP# Deassertion The deassertion of the PCI_STOP# signal will cause all PCI(0:2, 4:8) and stoppable PCIF clocks to resume running in a synchronous manner within two PCI clock periods after PCI_STOP# transitions to a HIGH level. The PCI STOP function is controlled by two inputs. One is the device PCI_STOP# pin number 34 and the other is SMBus Document #: 38-07507 Rev. *A Byte 0,Bit 3. These two inputs to the function are logically AND’ed. If either the external pin or the internal SMBus register bit is set LOW, the stoppable PCI clocks will be stopped in a logic LOW state. Reading SMBus Byte 0,Bit 3 will return a 0 value if either of these control bits are set LOW (which indicates that the devices stoppable PCI clocks are not running). Page 9 of 18 CY28339 t setup PCI_STP# PCIF PCI Figure 8. PCI_STOP# Deassertion Waveform VID (0:3), SEL (0,1) VTT_PWRGD# PWRGD 0.2-0.3mS Delay VDD Clock Gen Clock State Clock Outputs Clock VCO State 0 Wait for Sample Sels VTT_PWRGD# State 1 State 2 Off Device is not affected, VTT_PWRGD# is ignored. State 3 On On Off Figure 9. VTT_PWRGD# Timing Diagram S2 S1 VTT_PWRGD# = Low Delay >0.25mS Sample Inputs straps VDDA = 2.0V Wait for <1.8ms S0 Power Off S3 Normal Operation VDD3.3= off Enable Outputs VTT_PWRGD# = toggle Figure 10. Clock Generator Power-up/Run State Program Iout is selectable depending on implementation. The parameters above apply to all configurations. Vout is the voltage at the pin of the device. Document #: 38-07507 Rev. *A The various output current configurations are shown in the host swing select functions table. For all configurations, the deviation from the expected output current is ±7% as shown in the current accuracy table. Page 10 of 18 CY28339 Table 4. CPU Clock Current Select Function Board Target Trace/Term Z Reference R, Iref – Vdd (3*Rr) Output Current Voh @ Z 50Ω Rr = 330 1%, Iref = 3.33mA Ioh = 6*Iref 1.0V @ 50 50Ω Rr = 475 1%, Iref = 2.32mA Ioh = 6*Iref 0.7V @ 50 Table 5. Group Timing Relationship and Tolerances Offset Tolerance 3V66 to PCI Description 2.5 ns ±1.0 ns 3V66 leads PCI (unbuffered mode) Conditions USB_48M to DOT_48M Skew 0.0 ns ±1.0 ns 0 degrees phase shift 66BUFF(0:2) to PCI offset 2.5 ns ±1.0 ns 66BUFF leads PCI (buffered mode) USB_48M and DOT_48M Phase Relationship 66BUFF(0:2) to PCI Buffered Clock Skew The USB_48M and DOT_48M clocks are in phase. It is understood that the difference in edge rate will introduce some inherent offset. When 3V66_1/VCH clock is configured for VCH (48-MHz) operation it is also in phase with the USB and DOT outputs. See Figure 11. Figure 13 shows the difference (skew) between the 3V33(0:5) outputs when the 66M clocks are connected to 66IN. This offset is described in the Group Timing Relationship and Tolerances section of this data sheet. The measurements were taken at 1.5V. 66IN to 66BUFF(0:2) Buffered Prop Delay 3V66 to PCI Un-Buffered Clock Skew The 66IN to 66BUFF(0:2) output delay is shown in Figure 12.The Tpd is the prop delay from the input pin (66IN) to the output pins (66BUFF[0:2]). The outputs’ variation of Tpd is described in the AC parameters section of this data sheet. The measurement taken at 1.5V. Figure 1 shows the timing relationship between 3V66_0 and PCI(0:2,4:8) and PCIF when configured to run in the unbuffered mode. USB_48M DOT_48M Figure 11. USB_48M and DOT_48M Phase Relationship 66IN Tpd 66B Figure 12. 66IN to 66BUFF(0:2) Output Delay Figure 66B PCI PCIF 1.53.5ns Figure 13. Buffer Mode – 33V66_0; 66BUFF(0:2) Phase Relationship Document #: 38-07507 Rev. *A Page 11 of 18 CY28339 Buffer Characteristics 1. Output impedance of the current mode buffer circuit – Ro (see Figure 14). Current Mode CPU Clock Buffer Characteristics 2. Minimum and maximum required voltage operation range of the circuit – Vop (see Figure 14). The current mode output buffer detail and current reference circuit details are contained in the previous table of this data sheet. The following parameters are used to specify output buffer characteristics: 3. Series resistance in the buffer circuit – Ros (see Figure 14). 4. Current accuracy at given configuration into nominal test load for given configuration. VDD3 (3.3V +/- 5%) Slope ~ 1/R0 Ro Iout Ros 0V 1.2V Iout Vout = 1.2V max Vout Figure 14. Buffer Characteristics Table 6. Host Clock (HCSL) Buffer Characteristics Characteristic Min. Max. Ro 3000Ω (recommended) N/A N/A 1.2V Ros Vout Table 7. Maximum Lumped Capacitive Output Loads Clock Max Load Units PCI Clocks 30 pF 3V66 30 pF 66BUFF 30 pF USB_48M Clock 20 pF DOT_48M 10 pF REF Clock 50 pF Document #: 38-07507 Rev. *A Page 12 of 18 CY28339 Absolute Maximum Conditions Parameter Description VDD Core Supply Voltage VDD_A Analog Supply Voltage VIN Input Voltage Condition Min. Max. Unit –0.5 4.6 V –0.5 4.6 V Relative to V SS –0.5 VDD + 0.5 VDC –65 150 °C 0 70 °C – 150 °C 2000 – Volts TS Temperature, Storage Non Functional TA Temperature, Operating Ambient Functional TJ Temperature, Junction Functional ESDHBM ESD Protection (Human Body Model) MIL-STD-883, Method 3015 ØJC Dissipation, Junction to Case Mil-Spec 883E Method 1012.1 45 °C/W ØJA Dissipation, Junction to Ambient JEDEC (JESD 51) 15 °C/W UL-94 Flammability Rating At 1/8 in. MSL Moisture Sensitivity Level V–0 1 DC Electrical Specifications Parameter Description Condition Min. Max. Unit 3.135 3.465 V – 280 mA VDD_A, VDD_REF, VDD_PCI, VDD_3V66 , VDD_48, VDD_CPU 3.3 Operating Voltage 3.3 ± 5% IDD3.3V Dynamic Supply Current All frequencies at maximum values IPD3.3V Power Down Supply Current PD# Asserted CIN Input Pin Capacitance COUT Output Pin Capacitance – 6 pF LIN Pin Inductance – 7 nH CXTAL Crystal Pin Capacitance 30 42 pF – mA – Measured from the XIN 5 pF AC Electrical Specifications Parameter Description Condition Min. Max. Unit 47.5 52.5 % Crystal TDC XIN Duty Cycle The device will operate reliably with input duty cycles up to 30/70 but the REF clock duty cycle will not be within specification TPERIOD XIN period When Xin is driven from an external clock source 69.841 71.0 ns T R / TF XIN Rise and Fall Times Measured between 0.3VDD and 0.7VDD – 10.0 ns TCCJ XIN Cycle to Cycle Jitter As an average over 1µs duration – 500 ps TDC CPUT and CPUC Duty Cycle Measured at crossing point VOX 45 55 % TPERIOD 66MHz CPUT and CPUC Period Measured at crossing point VOX 14.85 15.3 ns TPERIOD 100MHz CPUT and CPUC Period Measured at crossing point VOX 9.85 10.2 ns TPERIOD 133MHz CPUT and CPUC Period Measured at crossing point VOX 7.35 7.65 ns TPERIOD 200MHz CPUT and CPUC Period Measured at crossing point VOX 4.85 5.1 ns TSKEW Any CPUT/C to CPUT/C Clock Skew Measured at crossing point VOX – 100 ps TCCJ CPUT/C Cycle to Cycle Jitter – 150 ps CPU at 0.7V Document #: 38-07507 Rev. *A Measured at crossing point VOX Page 13 of 18 CY28339 AC Electrical Specifications (continued) Parameter Description Condition Min. Max. Unit 175 700 ps – 20 % Rise Time Variation – 125 ps Fall Time Variation – 125 ps 280 430 mv Measured at crossing point VOX 45 55 % 66MHz CPUT and CPUC Period Measured at crossing point VOX 14.85 15.3 ns 100MHz CPUT and CPUC Period Measured at crossing point VOX 9.85 10.2 ns TPERIOD 133MHz CPUT and CPUC Period Measured at crossing point VOX 7.35 7.65 ns TPERIOD 200MHz CPUT and CPUC Period Measured at crossing point VOX 4.85 5.1 ns T R / TF CPUT and CPUC Rise and Fall Times Measured from Vol= 0.175 to Voh = 0.525V TRFM Rise/Fall Matching Determined as a fraction of 2*(TR-TF)/(TR+TF) ∆TR ∆TF VOX Crossing Point Voltage at 0.7V Swing TDC CPUT and CPUC Duty Cycle TPERIOD TPERIOD CPU at 1.0 Volts TSKEW Any CPUT/C to CPUT/C Clock Skew Measured at crossing point VOX – 100 ps TCCJ CPUT/C Cycle to Cycle Jitter Measured at crossing point VOX – 150 ps T R / TF CPUT and CPUC Rise and Fall Times Measured from Vol= 0.175 to Voh = 0.525V 175 467 ps VOX Crossing Point Voltage at 0.7V Swing 510 760 mv – 325 ps 45 55 % SE_ ∆Slew Absolute Single-ended Rise/Fall Waveform Symmetry 3V66 TDC 3V66 Duty Cycle Measurement at 1.5V TPERIOD 3V66 Period Measured at crossing point VOX 15.0 15.3 ns THIGH 3V66 High Time Measurement at 2.4V 4.95 – ns TLOW 3V66 Low Time Measurement at 0.4V 4.55 – ns T R / TF 3V66 Rise and Fall Times Measured between 0.4V and 2.4V 0.5 2.0 ns TSKEWUNBUFFERED Any 3V66 to Any 3V66 Clock Skew Measurement at 1.5V – 500 ps TSKEWBUFFERED Any 3V66 to Any 3V66 Clock Skew Measurement at 1.5V – 250 ps TCCJ 3V66 Cycle to Cycle Jitter Measurement at 1.5V – 250 ps 66BUFF TDC 66BUFF Duty Cycle Measurement at 1.5V 45 55 % T R / TF 66BUFF Rise and Fall Times Measured between 0.4V and 2.4V 0.5 2.0 ns TSKEW Any 66BUFF to Any 66BUFF Skew Measurement at 1.5V – 175 ps TCCJ 66BUFF Cycle to Cycle Jitter Measurement at 1.5V 100 ps TPD 66IN to 66BUFF(Propagation Delay) Measurement at 1.5V 2.5 4.5 ns 55 PCI /PCIF TDC PCI /PCIF Duty Cycle Measurement at 1.5V 45 TPERIOD PCI /PCIF Period Measured at crossing point VOX 30 % ns THIGH PCI and PCIF high time Measurement at 2.4V 12.0 – nS TLOW PCI and PCIF low time Measurement at 0.4V 12.0 – nS T R / TF PCI and PCIF rise and fall times Measured between 0.4V and 2.4V 0.5 2.0 nS TSKEW Any PCI clock to Any PCI clock Skew Measurement at 1.5V – 500 pS Document #: 38-07507 Rev. *A Page 14 of 18 CY28339 AC Electrical Specifications (continued) Parameter TCCJ Description Condition PCIF and PCI Cycle to Cycle Jitter Measurement at 1.5V Min. Max. Unit – 250 ps DOT_48M TDC DOT_48M Duty Cycle Measurement at 1.5V 45 55 % TPERIOD DOT_48M Period Measurement at 1.5V 20.83 20.83 ns T R / TF DOT_48M Rise and Fall Times Measured between 0.4V and 2.4V 0.5 1.0 ns TCCJ DOT_48M Cycle to Cycle Jitter Measurement at 1.5V – 350 ps TDC USB_48M Duty Cycle Measurement at 1.5V 45 55 % TPERIOD USB_48M Period Measurement at 1.5V 20.82 20.83 ns T R / TF USB_48M Rise and Fall Times Measured between 0.4V and 2.4V 1.0 2.0 ns TCCJ DOT_48M Cycle to Cycle Jitter Measurement at 1.5V – 350 ps TDC REF Duty Cycle Measurement at 1.5V 45 55 % TPERIOD REF Period Measurement at 1.5V T R / TF REF Rise and Fall Times Measured between 0.4V and 2.4V TCCJ REF Cycle to Cycle Jitter USB_48M REF 69.827 69.855 Measurement at 1.5V ns 1.0 4.0 V/ns – 1000 ps 1.0 10.0 ns 1.0 10.0 ns ENABLE/DISABLE and SETUP TPZL/TPZH Output Enable Delay (All Outputs) TPZL/TPZH Output Disable Delay (All Outputs) TSTABLE Clock Stabilization from Power-up TSS Stopclock Set Up Time TSH Stopclock Hold Time TSU Oscillator Start-up time When XIN is driven from external clock source CPU_STOP# and PIC_STOP# set up time with respect to PCIF clock to guarantee that the effected clock will stop or start at the next PCIF clock’s rising edge. – 3.0 ms 10.0 – ns 0 – ns When crystal meets min. 40Ω device series resistance specification Test and Measurement Set-up For Differential CPU Output Signals The following diagram shows lumped test load configurations for the differential Host Clock Outputs. CPUT TPCB 33.2Ω M easurem ent P oint 2p F 475Ω CPUC 33.2Ω TPCB 63.4 Ω 63 .4Ω M easurem ent P oint 2pF 3 30Ω Figure 15. 1.0V Test Load Termination Document #: 38-07507 Rev. *A Page 15 of 18 CY28339 TPCB 33Ω Measurement Point CPUT 49.9Ω 2pF TPCB 33Ω CPUC Measurement Point 2pF 49.9Ω 475Ω Figure 16. 0.7V Test Load Termination Output under Test Probe Load Cap 3.3V signals tDC - - 3.3V 2.4V 1.5V 0.4V 0V Tr Tf Figure 17. For Single-ended Output Signals Ordering Information Part Number Package Type Product Flow CY28339ZC 48-pin TSSOP Commercial, 0° to 70°C CY28339ZCT 48-pin TSSOP – Tape and Reel Commercial, 0° to 70°C CY28339ZXC 48-pin TSSOP Commercial, 0° to 70°C CY28339ZCXT 48-pin TSSOP – Tape and Reel Commercial, 0° to 70°C Lead Free Document #: 38-07507 Rev. *A Page 16 of 18 CY28339 Package Drawing and Dimensions 48-lead (240-mil) TSSOP II Z4824 0.500[0.019] 24 1 DIMENSIONS IN MM[INCHES] MIN. MAX. 7.950[0.313] 8.255[0.325] 5.994[0.236] 6.198[0.244] REFERENCE JEDEC MO-153 PACKAGE WEIGHT 0.33gms PART # Z4824 STANDARD PKG. ZZ4824 LEAD FREE PKG. 25 48 12.395[0.488] 12.598[0.496] 1.100[0.043] MAX. GAUGE PLANE 0.25[0.010] 0.20[0.008] 0.851[0.033] 0.950[0.037] 0.500[0.020] BSC 0.170[0.006] 0.279[0.011] 0.051[0.002] 0.152[0.006] 0°-8° SEATING PLANE 0.508[0.020] 0.762[0.030] 0.100[0.003] 0.200[0.008] 51-85059-*C Intel is a registered trademark of Intel Corporation. Dial-a-Frequency and Dial-a-dB are trademarks of Cypress Semiconductor. All product and company names mentioned in this document may be the trademarks of their respective holders. Document #: 38-07507 Rev. *A Page 17 of 18 © Cypress Semiconductor Corporation, 2004. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. CY28339 Document History Page Document Title: CY28339 Intel CK408 Mobile Clock Synthesizer Document Number: 38-07507 Issue Date Orig. of Change REV. ECN NO. ** 122362 12/13/02 RGL New Data Sheet *A 237868 See ECN RGL Added Lead Free Devices Document #: 38-07507 Rev. *A Description of Change Page 18 of 18