Moteur de recherche de fiches techniques de composants électroniques |
|
LM49370RLX-NOPB Fiches technique(PDF) 19 Page - Texas Instruments |
|
LM49370RLX-NOPB Fiches technique(HTML) 19 Page - Texas Instruments |
19 / 89 page LM49370 www.ti.com SNAS356D – FEBRUARY 2007 – REVISED MARCH 2012 Methods for producing these clock frequencies are described in the PLL Section. PLL M DIVIDER CONFIGURATION REGISTER This register is used to control the input section of the PLL. Table 6. PLL_M (0x02h)(1) Bits Field Description 0 RSVD RESERVED 6:0 PLL_M PLL_M Input Divider Value 0 No Divided Clock 1 1 2 1.5 3 2 4 2.5 ... 3 to 63 126 63.5 127 64 7 FORCERQ If set, the R and Q divider are enabled and the DAC and ADC clocks are propagated. This allows operation of the I2S and PCM interfaces without the ADC or DAC being enabled, for example to act as a bridge or a clock master. (1) See Further Notes on PLL Programming for more detail. The M divider should be set such that the output of the divider is between 0.5 MHz and 5 MHz. The division of the M divider is derived from PLL_M such that: M = (PLL_M + 1) / 2 PLL N DIVIDER CONFIGURATION REGISTER This register is used to control the feedback divider of the PLL. Table 7. PLL_N (0x03h)(1) Bits Field Description 7:0 PLL_N This programs the PLL feedback divider as follows: PLL_N Feedback Divider Value 0 to 10 10 11 11 12 12 13 13 14 14 … … 249 249 250 to 255 250 (1) See Further Notes on PLL Programming for further details. The N divider should be set such that the output of the divider is between 0.5 MHz and 5 MHz. (Fin/M)*N will be the target resting VCO frequency, FVCO. The N divider should be set such that 40 MHz < (Fin/M)*N < 60 MHz. Fin/M is often referred to as Fcomp (comparison frequency) or Fref (reference frequency), in this document Fcomp is used. The integer division of the N divider is derived from PLL_N such that: For 9 < PLL_N < 251: N = PLL_N PLL P DIVIDER CONFIGURATION REGISTER This register is used to control the output divider of the PLL. Copyright © 2007–2012, Texas Instruments Incorporated Submit Documentation Feedback 19 Product Folder Links: LM49370 |
Numéro de pièce similaire - LM49370RLX-NOPB |
|
Description similaire - LM49370RLX-NOPB |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |