Electronic Components Datasheet Search |
|
CY22150KZI-XXX Datasheet(PDF) 5 Page - Cypress Semiconductor |
|
CY22150KZI-XXX Datasheet(HTML) 5 Page - Cypress Semiconductor |
5 / 18 page CY22150 Document #: 38-07104 Rev. *K Page 5 of 18 Default Startup 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. If there is a conflict with any other devices in your system, then this can also be changed using CyClocksRT. Frequency Calculations and Register Defini- tions using the I2C 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 I2C Interface provides volatile programming. This means when the target system is powered down, the CY22150 reverts to its pre-I2C state, as defined above (programmed or unpro- grammed). When the system is powered back up again, the I2C registers must 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 2 lists the I2C 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 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 3 on page 6. The parameters controlling the gain are the crystal frequency, the internal crystal parasitic resistance (ESR, available from the manufacturer), and the CapLoad setting during crystal startup. 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 3 on page 6. All other bits in the register are reserved and should be programmed as shown in Table 4 on page 6. Using an External Clock as the Reference Input The CY22150 also accepts 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 5 on page 6. Table 2. Summary Table – CY22150 Programmable Registers Register Description D7 D6 D5 D4 D3 D2 D1 D0 09H CLKOE control 0 0 CLK6 CLK5 LCLK4 LCLK3 LCLK2 LCLK1 OCH DIV1SRC mux and DIV1N divider DIV1SRC DIV1N(6) DIV1N(5) DIV1N(4) DIV1N(3) DIV1N(2) DIV1N(1) DIV1N(0) 12H Input crystal oscillator drive control 0 0 1 XDRV(1) XDRV(0) 0 0 0 13H Input load capacitor control CapLoad (7) CapLoad (6) CapLoad (5) CapLoad (4) CapLoad (3) CapLoad (2) CapLoad (1) CapLoad (0) 40H Charge pump and PB counter 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 counter, Q counter PO Q(6) Q(5) Q(4) Q(3) Q(2) Q(1) Q(0) 44H Crosspoint switch matrix control 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 11 111 1 47H DIV2SRC mux and DIV2N divider DIV2SRC DIV2N(6) DIV2N(5) DIV2N(4) DIV2N(3) DIV2N(2) DIV2N(1) DIV2N(0) [+] Feedback |
Similar Part No. - CY22150KZI-XXX |
|
Similar Description - CY22150KZI-XXX |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |