CY22150 One-PLL General-Purpose Flash-Programmable and 2-Wire Serially Programmable Clock Generator Features • • • • • • • • Integrated phase-locked loop (PLL) Commercial and industrial operation Flash-programmable Field-programmable 2-wire serial programming interface Low-skew, low-jitter, high-accuracy outputs 3.3V operation with 2.5V output option 16-lead TSSOP • • Benefits • Internal PLL to generate six outputs up to 200 MHz. Able to generate custom frequencies from an external crystal or a driven source. • Performance guaranteed for applications that require an extended temperature range. • Nonvolatile reprogrammable technology allows easy customization, quick turnaround on design changes and product performance enhancements, and better inventory control. Parts can be reprogrammed up to 100 • • • times, reducing inventory of custom parts and providing an easy method for upgrading existing designs. The CY22150 can be programmed at the package level. In-house programming of samples and prototype quantities is available using the CY3672 FTG Development Kit. Production quantities are available through Cypress’s value-added distribution partners or by using third party programmers from BP Microsystems, HiLo Systems, and others. The CY22150 provides an industry-standard interface for volatile, system-level customization of unique frequencies and options. Serial programming and reprogramming allows quick design changes and product enhancements, eliminates inventory of old design parts, and simplifies manufacturing. High performance suited for commercial, industrial, networking, telecomm and other general-purpose applications. Application compatibility in standard and low-power systems. Industry-standard packaging saves on board space. Logic Block Diagram LCLK1 Divider Bank 1 XIN OSC. Q Φ VCO XOUT P Crosspoint Switch Matrix Divider Bank 2 PLL Serial SDAT Programming SCLK Interface LCLK2 LCLK3 LCKL4 CLK5 CLK6 SPI Control VDD VSS AVDD AVSS VDDL VSSL Pin Configuration Cypress Semiconductor Corporation Document #: 38-07104 Rev. *F • XIN 1 16 XOUT VDD 2 15 CLK6 AVDD 3 14 CLK5 SDAT 4 13 VSS AVSS 5 12 VSSL 6 11 LCLK1 LCLK2 7 10 8 9 3901 North First Street • LCLK4 VDDL SCLK LCLK3 San Jose, CA 95134 • 408-943-2600 Revised August 11, 2004 CY22150 Part Number Outputs CY22150FC 6 8 MHz–30 MHz (external crystal) 1 MHz–133 MHz (driven clock) Input Frequency Range 80 kHz–200 MHz (3.3V) 80 KHz–166.6 MHz (2.5V) Output Frequency Range Field programmable Serially programmable Commercial temperature Specifications CY22150FI 6 8 MHz–30 MHz (external crystal) 1 MHz–133 MHz (driven clock) 80 kHz – 166.6 MHz (3.3V) 80 KHz – 150 MHz (2.5V) Field programmable Serially programmable Industrial temperature Pin Definitions Pin Name Pin Number Pin Description XIN 1 Reference Input. Driven by a crystal (8 MHz – 30 MHz) or external clock (1 MHz – 133 MHz). Programmable input load capacitors allow for maximum flexibility in selecting a crystal, regardless of manufacturer, process, performance, or quality. VDD 2 3.3V voltage supply AVDD 3 3.3V analog voltage supply SDAT 4 Serial data input AVSS 5 Analog ground VSSL 6 LCLK ground LCLK1 7 Configurable clock output 1 at VDDL level (3.3V or 2.5V) LCLK2 8 Configurable clock output 2 at VDDL level (3.3V or 2.5V) LCLK3 9 Configurable clock output 3 at VDDL level (3.3V or 2.5V) SCLK 10 Serial clock input VDDL 11 LCLK voltage supply (2.5V or 3.3V) LCLK4 12 Configurable clock output 4 at VDDL level (3.3V or 2.5V) VSS 13 Ground CLK5 14 Configurable clock output 5 (3.3V) CLK6 15 Configurable clock output 6 (3.3V) XOUT[1] 16 Reference output Frequency Calculation and Register Definitions The CY22150 is an extremely flexible clock generator with four basic variables that can be used to determine the final output frequency. They are the input reference frequency (REF), the internally calculated P and Q dividers, and the post divider, which can be a fixed or calculated value. There are three basic formulas for determining the final output frequency of a CY22150-based design: • CLK = ((REF * P)/Q)/Post Divider • CLK = REF/Post Divider • CLK = REF. The basic PLL block diagram is shown in Figure 1. Each of the six clock outputs on the CY22150 has a total of seven output options available to it. There are six post divider options available: /2 (two of these), /3, /4, /DIV1N and /DIV2N. DIV1N and DIV2N are independently calculated and are applied to individual output groups. The post divider options can be applied to the calculated VCO frequency ((REF*P)/Q) or to the REF directly. In addition to the six post divider output options, the seventh option bypasses the PLL and passes the REF directly to the crosspoint switch matrix. Note: 1. Float XOUT if XIN is driven by an external clock source. Document #: 38-07104 Rev. *F Page 2 of 13 CY22150 DIV1N [OCH] CLKSRC Crosspoint Switch Matrix DIV1SRC [OCH] 1 Qtotal (Q+2) PFD VCO 0 [42H] Ptotal DIV1CLK REF /DIV1N /2 /3 (2(PB+4)+PO) LCLK1 [44H] LCLK2 [44H,45H] LCLK3 [45H] LCLK4 [45H] CLK5 [45H,46H] CLK6 Divider Bank 1 Divider Bank 2 [40H], [41H], [42H] 1 DIV2CLK 0 [44H] /4 /2 /DIV2N DIV2SRC [47H] DIV2N [47H] CLKOE [09H] Figure 1. Basic Block Diagram of CY22150 PLL Default Start-up Condition for the CY22150 The default (programmed) condition of the device is generally set by the distributor who programs the device using a customer-specific JEDEC file produced by CyClocksRT. Parts shipped from the factory are blank and unprogrammed. In this condition, all bits are set to 0, all outputs are three-stated, and the crystal oscillator circuit is active. While you can develop your own subroutine to program any or all of the individual registers described in the following pages, it may be easier to use CyClocksRT to produce the required register setting file. The serial interface address of the CY22150 is 69H. Should there be a conflict with any other devices in your system, this can also be changed using CyClocksRT. Frequency Calculations and Register Definitions Using the Serial Programming Interface The CY22150 provides an industry standard serial interface for volatile, in-system programming of unique frequencies and options. Serial programming and reprogramming allows for quick design changes and product enhancements, eliminates inventory of old design parts, and simplifies manufacturing. The Serial Programming Interface (SPI) provides volatile programming, i.e., when the target system is powered down, the CY22150 reverts to its pre-SPI state, as defined above (programmed or unprogrammed). When the system is Document #: 38-07104 Rev. *F powered back up again, the SPI registers will need to be reconfigured again. All programmable registers in the CY22150 are addressed with eight bits and contain eight bits of data. The CY22150 is a slave device with an address of 1101001 (69H). Table 1 lists the SPI registers and their definitions. Specific register definitions and their allowable values are listed below. Reference Frequency The REF can be a crystal or a driven frequency. For crystals, the frequency range must be between 8 MHz and 30 MHz. For a driven frequency, the frequency range must be between 1 MHz and 133 MHz. Using a Crystal as the Reference Input The input crystal oscillator of the CY22150 is an important feature because of the flexibility it allows the user in selecting a crystal as a REF source. The input oscillator has programmable gain, allowing for maximum compatibility with a reference crystal, regardless of manufacturer, process, performance and quality. Programmable Crystal Input Oscillator Gain Settings The Input crystal oscillator gain (XDRV) is controlled by two bits in register 12H, and are set according to Table 2. The parameters controlling the gain are the crystal frequency, the internal crystal parasitic resistance (ESR, available from the Page 3 of 13 CY22150 manufacturer), and the CapLoad setting during crystal start-up. bits in the register are reserved and should be programmed as shown in Table 3. Bits 3 and 4 of register 12H control the input crystal oscillator gain setting. Bit 4 is the MSB of the setting, and bit 3 is the LSB. The setting is programmed according to Table 2. All other Using an External Clock as the Reference Input The CY22150 can also accept an external clock as reference, with speeds up to 133 MHz. With an external clock, the XDRV (register 12H) bits must be set according to Table 4. Table 1. Summary Table – CY22150 Programmable Registers Register Description 09H CLKOE control OCH DIV1SRC mux and DIV1N divider 12H Input crystal oscillator drive control 13H Input load capacitor control 40H Charge Pump and PB counter 41H 42H PO counter, Q counter 44H Crosspoint switch matrix control D7 D6 D5 D4 D3 D2 D1 D0 0 0 CLK6 CLK5 LCLK4 LCLK3 LCLK2 LCLK1 DIV1SRC DIV1N(6) DIV1N(5) DIV1N(4) DIV1N(3) DIV1N(2) DIV1N(1) DIV1N(0) 0 0 1 XDRV(1) XDRV(0) 0 0 0 CapLoad (7) CapLoad (6) CapLoad (5) CapLoad (4) CapLoad (3) CapLoad (2) CapLoad (1) CapLoad (0) 1 1 0 Pump(2) Pump(1) Pump(0) PB(9) PB(8) PB(7) PB(6) PB(5) PB(4) PB(3) PB(2) PB(1) PB(0) PO Q(6) Q(5) Q(4) Q(3) Q(2) Q(1) Q(0) CLKSRC2 CLKSRC1 CLKSRC0 CLKSRC2 CLKSRC1 CLKSRC0 CLKSRC2 CLKSRC1 for LCLK1 for LCLK1 for LCLK1 for LCLK2 for LCLK2 for LCLK2 for LCLK3 for LCLK3 45H CLKSRC0 CLKSRC2 CLKSRC1 CLKSRC0 CLKSRC2 CLKSRC1 CLKSRC0 CLKSRC2 for LCLK3 for LCLK4 for LCLK4 for LCLK4 for CLK5 for CLK5 for CLK5 for CLK6 46H CLKSRC1 CLKSRC0 for CLK6 for CLK6 47H DIV2SRC mux and DIV2N divider 1 1 1 1 1 1 DIV2SRC DIV2N(6) DIV2N(5) DIV2N(4) DIV2N(3) DIV2N(2) DIV2N(1) DIV2N(0) Table 2. Programmable Crystal Input Oscillator Gain Settings Cap Register Settings 00H – 80H 80H – C0H C0H – FFH Effective Load Capacitance (CapLoad) 6 pF to 12 pF 12pF to 18pF 18pF to 30pF Crystal Input Frequency Crystal ESR 30Ω 60Ω 30Ω 60Ω 30Ω 60Ω 8 – 15 MHz 00 01 01 10 01 10 15 – 20 MHz 01 10 01 10 10 10 20 – 25 MHz 01 10 10 10 10 11 25 – 30 MHz 10 10 10 11 11 N/A Table 3. Bit Locations and Values Address D7 D6 D5 D4 D3 D2 D1 D0 12H 0 0 1 XDRV(1) XDRV(0) 0 0 0 Table 4. Programmable External Reference Input Oscillator Drive Settings Reference Frequency Drive Setting Document #: 38-07104 Rev. *F 1 – 25 MHz 25 – 50 MHz 50 – 90 MHz 90 – 133 MHz 00 01 10 11 Page 4 of 13 CY22150 made up of two internal variables, PB and PO. The formula for calculating Ptotal is: Input Load Capacitors Input load capacitors allow the user to set the load capacitance of the CY22150 to match the input load capacitance from a crystal. The value of the input load capacitors is determined by 8 bits in a programmable register [13H]. Total load capacitance is determined by the formula: Ptotal = (2(PB + 4) + PO). PB is a 10-bit variable, defined by registers 40H(1:0) and 41H(7:0). The 2 LSBs of register 40H are the two MSBs of variable PB. Bits 4..2 of register 40H are used to determine the charge pump settings (see Section 5). The 3 MSBs of register 40H are preset and reserved and cannot be changed. PO is a single bit variable, defined in register 42H(7). This allows for odd numbers in Ptotal. CapLoad = (CL– CBRD – CCHIP)/0.09375 pF where: • CL = specified load capacitance of your crystal. • CBRD = the total board capacitance, due to external capacitors and board trace capacitance. In CyClocksRT, this value defaults to 2 pF. • CCHIP = 6 pF. • 0.09375 pF = the step resolution available due to the 8-bit register. In CyclocksRT, only the crystal capacitance (CL) is specified. CCHIP is set to 6 pF, and CBRD defaults to 2 pF. If your board capacitance is higher or lower than 2 pF, the formula above can be used to calculate a new CapLoad value and programmed into register 13H. The remaining seven bits of 42H are used to define the Q counter, as shown in Table 6. The minimum value of Ptotal is 8. The maximum value of Ptotal is 2055. To achieve the minimum value of Ptotal, PB and PO should both be programmed to 0. To achieve the maximum value of Ptotal, PB should be programmed to 1023, and PO should be programmed to 1. Stable operation of the CY22150 cannot be guaranteed if the value of (Ptotal*(REF/Qtotal)) is above 400 MHz or below 100 MHz. Registers 40H, 41H and 42H are defined in Table 7. PLL Post Divider Options [OCH(7..0)], [47H(7..0)] In CyClocksRT, enter the crystal capacitance (CL). The value of CapLoad will be determined automatically and programmed into the CY22150. Through the SDAT and SCLK pins, the value can be adjusted up or down if your board capacitance is greater or less than 2 pF. For an external clock source, CapLoad defaults to 0. See Table 5 for CapLoad bit locations and values. The output of the VCO is routed through two independent muxes, then to two divider banks to determine the final clock output frequency. The mux determines if the clock signal feeding into the divider banks is the calculated VCO frequency or REF. There are two select muxes (DIV1SRC and DIV2SRC) and two divider banks (Divider Bank 1 and Divider Bank 2) used to determine this clock signal. The clock signal passing through DIV1SRC and DIV2SRC is referred to as DIV1CLK and DIV2CLK, respectively. The input load capacitors are placed on the CY22150 die to reduce external component cost. These capacitors are true parallel-plate capacitors, designed to reduce the frequency shift that occurs when non-linear load capacitance is affected by load, bias, supply and temperature changes. The divider banks have 4 unique divider options available: /2, /3, /4, and /DIVxN. DIVxN is a variable that can be independently programmed (DIV1N and DIV2N) for each of the two divider banks. The minimum value of DIVxN is 4. The maximum value of DIVxN is 127. A value of DIVxN below 4 is not guaranteed to work properly. PLL Frequency, Q Counter [42H(6..0)] The first counter is known as the Q counter. The Q counter divides REF by its calculated value. Q is a 7 bit divider with a maximum value of 127 and minimum value of 0. The primary value of Q is determined by 7 bits in register 42H (6..0), but 2 is added to this register value to achieve the total Q, or Qtotal. Qtotal is defined by the formula: DIV1SRC is a single bit variable, controlled by register OCH. The remaining seven bits of register OCH determine the value of post divider DIV1N. DIV2SRC is a single bit variable, controlled by register 47H. The remaining seven bits of register 47H determine the value of post divider DIV2N. Qtotal = Q + 2 The minimum value of Qtotal is 2. The maximum value of Qtotal is 129. Register 42H is defined in the table. Register OCH and 47H are defined in Table 8. Stable operation of the CY22150 cannot be guaranteed if REF/Qtotal falls below 250 kHz. Qtotal bit locations and values are defined in Table 6. Charge Pump Settings [40H(2..0)] The correct pump setting is important for PLL stability. Charge pump settings are controlled by bits (4..2) of register 40H, and are dependent on internal variable PB (see “PLL Frequency, P Counter[40H(1..0)], [41H(7..0)], [42H(7)]”). Table 9 summarizes the proper charge pump settings, based on Ptotal. PLL Frequency, P Counter [40H(1..0)], [41H(7..0)], [42H(7) The next counter definition is the P (product) counter. The P counter is multiplied with the (REF/Qtotal) value to achieve the VCO frequency. The product counter, defined as Ptotal, is See Table 10 for register 40H bit locations and values. Table 5. Input Load Capacitor Register Bit Settings Address 13H D7 D6 D5 D4 D3 D2 D1 D0 CapLoad(7) CapLoad(6) CapLoad(5) CapLoad(4) CapLoad(3) CapLoad(2) CapLoad(1) CapLoad(0) Document #: 38-07104 Rev. *F Page 5 of 13 CY22150 Table 6. P Counter Register Definition Address D7 D6 D5 D4 D3 D2 D1 D0 40H 1 1 0 Pump(2) Pump(1) Pump(0) PB(9) PB(8) 41H PB(7) PB(6) PB(5) PB(4) PB(3) PB(2) PB(1) PB(0) 42H PO Q(6) Q(5) Q(4) Q(3) Q(2) Q(1) Q(0) Table 7. P Counter Register Definition Address D7 D6 D5 D4 D3 D2 D1 D0 40H 1 1 0 Pump(2) Pump(1) Pump(0) PB(9) PB(8) 41H PB(7) PB(6) PB(5) PB(4) PB(3) PB(2) PB(1) PB(0) 42H PO Q(6) Q(5) Q(4) Q(3) Q(2) Q(1) Q(0) Table 8. PLL Post Divider Options Address D7 D6 D5 D4 D3 D2 D1 D0 OCH DIV1SRC DIV1N(6) DIV1N(5) DIV1N(4) DIV1N(3) DIV1N(2) DIV1N(1) DIV1N(0) 47H DIV2SRC DIV2N(6) DIV2N(5) DIV2N(4) DIV2N(3) DIV2N(2) DIV2N(1) DIV2N(0) Table 9. Charge Pump Settings Charge Pump Setting – Pump(2..0) Calculated Ptotal 000 16 – 44 001 45 – 479 010 480 – 639 011 640 – 799 100 800 – 1023 101, 110, 111 Do not use – device will be unstable Table 10. Register 40H Change Pump Bit Settings Address D7 D6 D5 D4 D3 D2 D1 D0 40H 1 1 0 Pump(2) Pump(1) Pump(0) PB(9) PB(8) Although using the above table will guarantee stability, it is recommended to use the Print Preview function in CyClocksRT to determine the correct charge pump settings for optimal jitter performance. PLL stability cannot be guaranteed for values below 16 and above 1023. If values above 1023 are needed, use CyClocksRT to determine the best charge pump setting. Clock Output Settings: CLKSRC – Clock Output Crosspoint Switch Matrix [44H(7..0)], [45H(7..0)], [46H(7..6)] CLKOE – Clock Output Enable Control [09H(5..0)] Every clock output can be defined to come from one of seven unique frequency sources. The CLKSRC(2..0) crosspoint switch matrix defines which source is attached to each individual clock output. CLKSRC(2..0) is set in Registers 44H, 45H, and 46H. The remainder of register 46H(5:0) must be written with the values stated in the register table when writing register values 46H(7:6). In addition, each clock output has individual CLKOE control, set by register 09H(5..0). When DIV1N is divisible by four, then CLKSRC(0,1,0) is guaranteed to be rising edge phase-aligned with CLKSRC(0,0,1). When DIV1N is six, then CLKSRC(0,1,1) is Document #: 38-07104 Rev. *F guaranteed to CLKSRC(0,0,1). be rising edge phase-aligned with When DIV2N is divisible by four, then CLKSRC(1,0,1) is guaranteed to be rising edge phase-aligned with CLKSRC(1,0,0). When DIV2N is divisible by eight, then CLKSRC(1,1,0) is guaranteed to be rising edge phase-aligned with CLKSRC(1,0,0). Each clock output has its own output enable, controlled by register 09H(5..0). To enable an output, set the corresponding CLKOE bit to 1. CLKOE settings are in Table 13. The output swing of LCLK1 through LCLK4 is set by VDDL. The output swing of CLK5 and CLK6 is set by VDD. Test, Reserved, and Blank Registers Writing to any of the following registers will cause the part to exhibit abnormal behavior, as follows. [00H to 08H] [0AH to 0BH] [0DH to 11H] [14H to 3FH] [43H] [48H to FFH] – Reserved – Reserved – Reserved – Reserved – Reserved – Reserved. Page 6 of 13 CY22150 Table 11. CLKSRC2 CLKSRC1 CLKSRC0 Definition and Notes 0 0 0 Reference input. 0 0 1 DIV1CLK/DIV1N. DIV1N is defined by register [OCH]. Allowable values for DIV1N are 4 to 127. If Divider Bank 1 is not being used, set DIV1N to 8. 0 1 0 DIV1CLK/2. Fixed /2 divider option. If this option is used, DIV1N must be divisible by 4. 0 1 1 DIV1CLK/3. Fixed /3 divider option. If this option is used, set DIV1N to 6. 1 0 0 DIV2CLK/DIV2N. DIV2N is defined by Register [47H]. Allowable values for DIV2N are 4 to 127. If Divider Bank 2 is not being used, set DIV2N to 8. 1 0 1 DIV2CLK/2. Fixed /2 divider option. If this option is used, DIV2N must be divisible by 4. 1 1 0 DIV2CLK/4. Fixed /4 divider option. If this option is used, DIV2N must be divisible by 8. 1 1 1 Reserved – do not use. Table 12. Address D7 D6 D5 D4 D3 D2 D1 D0 44H CLKSRC2 for LCLK1 CLKSRC1 for LCLK1 CLKSRC0 for LCLK1 CLKSRC2 for LCLK2 CLKSRC1 for LCLK2 CLKSRC0 for LCLK2 CLKSRC2 for LCLK3 CLKSRC1 for LCLK3 45H CLKSRC0 for LCLK3 CLKSRC2 for LCLK4 CLKSRC1 for LCLK4 CLKSRC0 for LCLK4 CLKSRC2 for CLK5 CLKSRC1 for CLK5 CLKSRC0 for CLK5 CLKSRC2 for CLK6 46H CLKSRC1 for CLK6 CLKSRC0 for CLK6 1 1 1 1 1 1 Table 13. CLKOE Bit Setting Address D7 D6 D5 D4 D3 D2 D1 D0 09H 0 0 CLK6 CLK5 LCLK4 LCLK3 LCLK2 LCLK1 Programmable Interface Timing The CY22150 utilizes a 2-wire serial-interface SDAT and SCLK that operates up to 400 kbits/second in Read or Write mode. The basic Write serial format is as follows. Start Sequence – Start frame is indicated by SDAT going LOW when SCLK is HIGH. Every time a Start signal is given, the next eight-bit data must be the device address (seven bits) and a R/W bit, followed by register address (eight bits) and register data (eight bits). Start Bit; seven-bit Device Address (DA); R/W Bit; Slave Clock Acknowledge (ACK); eight-bit Memory Address (MA); ACK; eight-bit data; ACK; eight-bit data in MA + 1 if desired; ACK; eight-bit data in MA+2; ACK; etc. until STOP bit.The basic serial format is illustrated in Figure 3. Stop Sequence – Stop frame is indicated by SDAT going HIGH when SCLK is HIGH. A Stop frame frees the bus for writing to another part on the same bus or writing to another random register address. Data Valid During Write mode, the CY22150 will respond with an ACK pulse after every eight bits. This is accomplished by pulling the SDAT line LOW during the N*9th clock cycle, as illustrated in Figure 5. (N = the number of eight-bit segments transmitted.) During Read mode, the ACK pulse after the data packet is sent is generated by the master. Data is valid when the Clock is HIGH, and may only be transitioned when the clock is LOW, as illustrated in Figure 2. Data Frame Every new data frame is indicated by a start and stop sequence, as illustrated in Figure 4. Data valid Acknowledge Pulse Transition to next bit SDAT CLKHIGH tDH tSU VIH SCLK VIL CLKLOW Figure 2. Data Valid and Data Transition Periods Document #: 38-07104 Rev. *F Page 7 of 13 CY22150 SDAT Write Multiple Contiguous Registers 1-bit 1-bit 1-bit 1-bit 1-bit Slave Slave Slave Slave ACK ACK R/W = 0 ACK ACK 7-bit 8-bit 8-bit 8-bit 8-bit Device Register Register Register Register Data Address Address Data Data (XXH) (XXH) (XXH+1) (XXH+2) 1-bit Slave ACK 1-bit Slave ACK 1-bit 1-bit 1-bit 1-bit Slave Slave 1-bit Master R/W = 1 ACK R/W = 0 ACK ACK 7-bit 8-bit 8-bit 8-bit Device Register 7-Bit Register Register Address Address Device Data Data (XXH) Address (XXH) (XXH+1) 1-bit Master ACK 8-bit Register Data (FFH) 1-bit Slave ACK 8-bit Register Data (00H) Stop Signal Start Signal SDAT Read Multiple Contiguous Registers 1-bit Master ACK 8-bit Register Data (FFH) 1-bit Slave ACK 1-bit Master ACK 8-bit Register Data (00H) 1-bit Master ACK Stop Signal Start Signal Figure 3. Data Frame Architecture SDAT Transition to next bit START SCLK STOP Figure 4. Start and Stop Frame SDAT + START DA6 DA5DA0 + R/W ACK RA7 RA0 D7 ACK + + SCLK RA6RA1 + D6 D1 D0 ACK STOP + Figure 5. Frame Format (Device Address, R/W, Register Address, Register Data Parameter fSCLK Description Min. Frequency of SCLK Max. Unit 400 kHz SCLK HIGH period 0.6 µs µs µs tSU Data transition to SCLK HIGH 100 ns tDH Data hold (SCLK LOW to data transition) Start mode time from SDA LOW to SCL LOW 0.6 CLKLOW SCLK LOW period 1.3 CLKHIGH 0 Rise time of SCLK and SDAT Fall time of SCLK and SDAT 300 Stop mode time from SCLK HIGH to SDAT HIGH 0.6 Stop mode to Start mode 1.3 Document #: 38-07104 Rev. *F ns 300 ns ns µs µs Page 8 of 13 CY22150 Applications Controlling Jitter Jitter is defined in many ways including: phase noise, long-term jitter, cycle to cycle jitter, period jitter, absolute jitter, and deterministic. These jitter terms are usually given in terms of rms, peak to peak, or in the case of phase noise dBC/Hz with respect to the fundamental frequency. Power Supply Noise and clock output loading are two major system sources of clock jitter. Power Supply noise can be mitigated by proper power supply decoupling (0.1 µF ceramic cap 0.25”) of the clock and ensuring a low impedance ground to the chip. Reducing capacitive clock output loading to a minimum lowers current spikes on the clock edges and thus reduces jitter. Reducing the total number of active outputs will also reduce jitter in a linear fashion. However, it is better to use two outputs to drive two loads than one output to drive two loads. The rate and magnitude that the PLL corrects the VCO frequency is directly related to jitter performance. If the rate is too slow, then long term jitter and phase noise will be poor. Therefore, to improve long-term jitter and phase noise, reducing Q to a minimum is advisable. This technique will increase the speed of the Phase Frequency Detector which in turn drive the input voltage of the VCO. In a similar manner increasing P till the VCO is near its maximum rated speed will also decrease long term jitter and phase noise. For example: Input Reference of 12 MHz; desired output frequency of 33.3 MHz. One might arrive at the following solution: Set Q = 3, P = 25, Post Div = 3. However, the best jitter results will be Q = 2, P = 50, Post Div = 9. For more information, refer to the application note “Jitter in PLL-Based Systems: Causes, Effects, and Solutions” available at http://www.cypress.com/clock/appnotes.html, or contact your local Cypress field applications engineer. Test Circuit VDD CLK out 0.1 mF C LOAD OUTPUTS AVDD VDDL 0.1 µF 0.1 mF GND t1 t3 t4 80% CLK t2 CLK 50% 50% 20% Figure 6. Duty Cycle Definition; DC = t2/t1 Figure 7. Rise and Fall Time Definitions t6 Figure 8. Peak-to-Peak Jitter Document #: 38-07104 Rev. *F Page 9 of 13 CY22150 Table 14. Absolute Maximum Conditions Parameter Min. Max. Unit VDD Supply Voltage Description –0.5 7.0 V VDDL I/O Supply Voltage –0.5 7.0 V TS Storage Temperature[2] –65 125 °C TJ Junction Temperature 125 °C Package Power Dissipation – Commercial Temp 450 mW 380 mW AVDD + 0.3 V Package Power Dissipation – Industrial Temp ESD Digital Inputs AVSS – 0.3 Digital Outputs referred to VDD VSS – 0.3 VDD + 0.3 V Digital Outputs referred to VDDL VSS – 0.3 VDDL +0.3 V 2000 V Static Discharge Voltage per MIL-STD-833, Method 3015 Table 15. Recommended Operating Conditions Parameter Min. Typ. Max. Unit Operating Voltage 3.135 3.3 3.465 V [3] Operating Voltage 3.135 3.3 3.465 V VDDLLO[3] Operating Voltage 2.375 2.5 2.625 V VDD VDDLHI Description TAC Ambient Commercial Temp TAI Ambient Industrial Temp 0 70 °C –40 85 °C CLOAD Max. Load Capacitance, VDD/VDDL = 3.3V 15 pF CLOAD Max. Load Capacitance, VDDL = 2.5V 15 pF fREFD Driven REF 1 133 MHz fREFC Crystal REF 8 30 MHz 0.05 500 ms tPU Power-up time for all VDDs to reach minimum specified voltage (power ramps must be monotonic) Table 16. DC Electrical Characteristics Parameter[4] Name Description Min. Typ. Max. Unit IOH3.3 Output High Current VOH = VDD – 0.5, VDD/VDDL = 3.3V (sink) 12 24 mA IOL3.3 Output Low Current VOL = 0.5, VDD/VDDL = 3.3V (source) 12 24 mA IOH2.5 Output High Current VOH = VDDL – 0.5, VDDL = 2.5V (source) 8 16 mA IOL2.5 Output Low Current VOL = 0.5, VDDL = 2.5V (sink) 8 16 mA VIH Input High Voltage CMOS levels, 70% of VDD VIL Input Low Voltage CMOS levels, 30% of VDD CIN Input Capacitance SCLK and SDAT Pins IIZ Input Leakage Current SCLK and SDAT Pins VHYS Hysteresis of Schmitt triggered inputs SCLK and SDAT Pins IVDD[5,6] Supply Current AVDD/VDD Current 45 mA IVDDL3.3[5,6] Supply Current VDDL Current (VDDL = 3.465V) 25 mA IVDDL2.5[5,6] 0.7 VDD 0.3 7 pF µA 5 0.05 VDD Supply Current VDDL Current (VDDL = 2.625V) 17 Notes: 2. Rated for 10 years. 3. VDDLis only specified and characterized at 3.3V ± 5% and 2.5V ± 5%. VDDLmay be powered at any value between 3.465V and 2.375V. 4. Not 100% tested. 5. IVDD currents specified for two CLK outputs running at 125 MHz, two LCLK outputs running at 80 MHz, and two LCLK outputs running at 66.6 MHz. 6. Use CyClocksRT to calculate actual IVDD and IVDDL for specific output frequency configurations. Document #: 38-07104 Rev. *F VDD mA Page 10 of 13 CY22150 Table 17. AC Electrical Characteristics Parameter[7] Max. Unit Output Frequency, Commercial Temp Clock output limit, 3.3V 0.08 (80 kHz) 200 MHz Clock output limit, 2.5V 0.08 (80 kHz) 166.6 MHz Output Frequency, Industrial Temp Clock output limit, 3.3V 0.08 (80 kHz) 166.6 MHz Clock output limit, 2.5V 0.08 (80 kHz) 150 MHz t2LO Output Duty Cycle Duty cycle is defined in Figure 6; t1/t2 fOUT < 166 MHz, 50% of VDD 45 50 55 % t2HI Output Duty Cycle Duty cycle is defined in Figure 6; t1/t2 fOUT > 166 MHz, 50% of VDD 40 50 60 % t3LO Rising Edge Slew Rate (VDDL = 2.5V) Output clock rise time, 20% – 80% of VDDL. Defined in Figure 7. 0.6 1.2 V/ns t4LO Falling Edge Slew Rate (VDDL = 2.5V) Output dlock fall time, 80% – 20% of VDDL. Defined in Figure 7. 0.6 1.2 V/ns t3HI Rising Edge Slew Rate (VDDL = 3.3V) Output dlock rise time, 20% – 80% of VDD/VDDL. Defined in Figure 7. 0.8 1.4 V/ns t4HI Falling Edge Slew Rate (VDDL = 3.3V) Output dlock fall time, 80% – 20% of VDD/VDDL. Defined in Figure 7. 0.8 1.4 V/ns t5[8] t1 Name Description Min. Skew Output-output skew between related outputs. t6[9] Clock Jitter Peak-to-peak period jitter t10 PLL Lock Time Typ. 250 ps 3 ms 250 ps 0.30 Device Characteristics Parameter Name Value Unit θJA theta JA 115 °C/W Complexity Transistor Count 74,600 transistors Ordering Information Ordering Code Package Name Package Type Operating Range CY22150FC Z16 16-lead TSSOP Commercial (0 to 70°C) 3.3V CY22150FI Z16 16-lead TSSOP Industrial (–40 to 85°C) 3.3V CY22150ZC-xxx [10] Operating Voltage Z16 16-lead TSSOP Commercial (0 to 70°C) 3.3V CY22150ZI-xxx[10] Z16 16-lead TSSOP Industrial (–40 to 85°C) 3.3V CY3672 FTG Development System N/A CY3672ADP000 CY22150F Socket Notes: 7. Not 100% tested, guaranteed by design. 8. Skew value guaranteed when outputs are generated from the same divider bank. See Logic Diagram for more information. 9. Jitter measurement will vary. Actual jitter is dependent on XIN jitter and edge rate, number of active outputs, output frequencies, VDDL, (2.5V or 3.3V jitter in “PLL-Based Systems: Causes, Effects, and Solutions,” available at http://wwww.cypress.com/clock/appnotes.html, or contact your local Cypress field applications engineer). 10. The CY22150ZC-xxx and CY22150ZI-xxx are factory programmed configurations. Factory programming is available for high-volume design opportunities of 100Ku/year or more in production. For more details, contact your local Cypress FAE or Cypress Sales Representative. Document #: 38-07104 Rev. *F Page 11 of 13 CY22150 Package Diagram 16-lead TSSOP 4.40 MM Body Z16.173 PIN 1 ID DIMENSIONS IN MM[INCHES] MIN. MAX. 1 REFERENCE JEDEC MO-153 6.25[0.246] 6.50[0.256] PACKAGE WEIGHT 0.05 gms PART # 4.30[0.169] 4.50[0.177] Z16.173 STANDARD PKG. ZZ16.173 LEAD FREE PKG. 16 0.65[0.025] BSC. 0.19[0.007] 0.30[0.012] 1.10[0.043] MAX. 0.25[0.010] BSC GAUGE PLANE 0°-8° 0.076[0.003] 0.85[0.033] 0.95[0.037] 4.90[0.193] 5.10[0.200] 0.05[0.002] 0.15[0.006] SEATING PLANE 0.50[0.020] 0.70[0.027] 0.09[[0.003] 0.20[0.008] 51-85091-*A BP Microsystems is a trademark of BP Microsystems. HiLo Systems is a trademark of Hi-Lo Systems, Inc. CyClocks is a trademark of Cypress Semiconductor. All product and company names mentioned in this document are the trademarks of their respective holders. Document #: 38-07104 Rev. *F Page 12 of 13 © 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. CY22150 Document History Page Document Title: CY22150 One-PLL General-Purpose Flash-Programmable and 2-Wire Serially-Programmable Clock Generator Document Number: 38-07104 REV. ECN NO. Issue Date Orig. of Change Description of Change ** 107498 08/08/01 CKN New Data Sheet *A 110043 02/06/02 CKN Preliminary to Final *B 113514 05/01/02 CKN Removed overline on Figure 5 Register Address Register Data Changed CLKHIGH unit from ns to µs in parameter description table Added (sink) to rows 1 and 4 and added (source) to rows 2 and 3 in the DC Electrical Characteristics table (Figure 16) *C 121868 12/14/02 RBI Power-up requirements added to Operating Conditions Information *D 125453 05/19/03 CKN Changed 0 to 1 under 12H/D5 of Table 1 and Table 3. Reworded and reformatted Programmable Crystal Input Oscillator Gain Settings text. *E 242808 See ECN RGL Minor Change: Fixed the broken line in the block diagram *F 252352 See ECN RGL Corrected Table 2 specs. Document #: 38-07104 Rev. *F Page 13 of 13