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RM48L940 Arkusz danych(PDF) 63 Page - Texas Instruments

Numer części RM48L940
Szczegółowy opis  RM48Lx40 16- and 32-Bit RISC Flash Microcontroller
Download  174 Pages
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

RM48L940 Arkusz danych(HTML) 63 Page - Texas Instruments

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background image
/NR
/1 to /64
OSCIN
PLL
INTCLK
/OD
/1 to /8
VCOCLK
/R
/1 to /32
post_ODCLK
/NF
/1 to /256
PLLCLK
/NR2
/1 to /64
OSCIN
PLL#2
INTCLK2
/OD2
/1 to /8
VCOCLK2
/R2
/1 to /32
post_ODCLK2
/NF2
/1 to /256
PLL2CLK
fPLLCLK = (fOSCIN / NR) * NF / (OD * R)
f
PLL2CLK = (fOSCIN / NR2) * NF2 / (OD2 * R2)
RM48L940, RM48L740, RM48L540
www.ti.com
SPNS175C – APRIL 2012 – REVISED JUNE 2015
6.6.1.3
Phase Locked Loop (PLL) Clock Modules
The PLL is used to multiply the input frequency to some higher frequency.
The main features of the PLL are:
Frequency modulation can be optionally superimposed on the synthesized frequency of PLL1. The
frequency modulation capability of PLL2 is permanently disabled.
Configurable frequency multipliers and dividers.
Built-in PLL Slip monitoring circuit.
Option to reset the device on a PLL slip detection.
6.6.1.3.1 Block Diagram
Figure 6-6 shows a high-level block diagram of the two PLL macros on this microcontroller. PLLCTL1 and
PLLCTL2 are used to configure the multiplier and dividers for the PLL1. PLLCTL3 is used to configure the
multiplier and dividers for PLL2.
Figure 6-6. ZWT PLLx Block Diagram
6.6.1.3.2 PLL Timing Specifications
Table 6-11. PLL Timing Specifications
PARAMETER
MIN
MAX
UNIT
fINTCLK
PLL1 Reference Clock frequency
1
20
MHz
fpost_ODCLK
Post-ODCLK – PLL1 Post-divider input clock frequency
400
MHz
fVCOCLK
VCOCLK – PLL1 Output Divider (OD) input clock frequency
150
550
MHz
fINTCLK2
PLL2 Reference Clock frequency
1
20
MHz
fpost_ODCLK2
Post-ODCLK – PLL2 Post-divider input clock frequency
400
MHz
fVCOCLK2
VCOCLK – PLL2 Output Divider (OD) input clock frequency
150
550
MHz
Copyright © 2012–2015, Texas Instruments Incorporated
System Information and Electrical Specifications
63
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