Motore di ricerca datesheet componenti elettronici |
|
CS2200P-CZZ Scheda tecnica(PDF) 10 Page - Cirrus Logic |
|
CS2200P-CZZ Scheda tecnica(HTML) 10 Page - Cirrus Logic |
10 / 22 page CS2200-OTP 10 DS842PP1 5.2.2 Crystal Connections (XTI and XTO) An external crystal may be used to generate RefClk. To accomplish this, a 20 pF fundamental mode par- allel resonant crystal must be connected between the XTI and XTO pins as shown in Figure 4. As shown, nothing other than the crystal and its load capacitors should be connected to XTI and XTO. Please refer to the “AC Electrical Characteristics” on page 7 for the allowed crystal frequency range. 5.2.3 External Reference Clock (REF_CLK) For operation with an externally generated REF_CLK signal, XTI/REF_CLK should be connected to the reference clock source and XTO should be left unconnected or terminated through a 47 k Ω resistor to GND. 5.3 Output to Input Frequency Ratio Configuration 5.3.1 User Defined Ratio (RUD) The User Defined Ratio, RUD, is a 32-bit un-signed fixed-point number which determines the basis for the desired input to output clock ratio. Up to four different ratios, Ratio0-3, can be stored in the CS2200’s one time programmable memory. Selection between the four ratios is achieved by the M[1:0] mode select pins. The 32-bit RUD is represented in a 12.20 format where the 12 MSBs represent the integer binary portion while the remaining 20 LSBs represent the fractional binary portion. The maximum multiplication factor is approximately 4096 with a resolution of 0.954 PPM in this configuration. See “Calculating the User Defined Ratio” on page 19 for more information. The status of internal dividers, such as the internal timing reference clock divider, are automatically taken into account. Therefore RUD is simply the desired ratio of the output to input clock frequencies. Referenced Control Parameter Definition Ratio 0-3................................“Ratio 0 - 3” on page 17 M[1:0] ....................................“M1 and M0 Mode Pin Functionality” on page 13 XTI XTO 40 pF 40 pF Figure 4. External Component Requirements for Crystal Circuit |
Codice articolo simile - CS2200P-CZZ |
|
Descrizione simile - CS2200P-CZZ |
|
|
Link URL |
Privacy Policy |
ALLDATASHEETIT.COM |
Lei ha avuto il aiuto da alldatasheet? [ DONATE ] |
Di alldatasheet | Richest di pubblicita | contatti | Privacy Policy | scambio Link | Ricerca produttore 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 |