TMS320TCI6618

Communications Infrastructure KeyStone SoC

www.ti.com

SPRS688—February 2011

 

7.8 Main PLL and the PLL Controller

This section provides a description of the Main PLL and the PLL controller. For details on the operation of the PLL controller module, see the Phase Locked Loop (PLL) Controller for KeyStone Devices User Guide in ‘‘Related Documentation from Texas Instruments’’ on page 59.

Note—The Main PLL controller registers can be accessed by any master in the device.

The Main PLL is controlled by the standard PLL controller. The PLL controller manages the clock ratios, alignment, and gating for the system clocks to the device. Figure 7-17 shows a block diagram of the main PLL controller. The following paragraphs define the clocks and PLL controller parameters.

Figure 7-17 Main PLL and PLL Controller

 

 

 

AIF Module

Main PLL Controller

 

 

xM

/2

 

 

SYSCLK(N|P)

 

REFCLK

C66x

 

 

 

ALTCORECLK(N|P)

 

 

CorePac

Main PLL

/x

 

 

CORECLKSEL

 

 

 

 

SYSCLK2

 

 

/2

 

 

 

 

SYSCLK3

 

 

/3

 

 

 

 

SYSCLK4

 

 

/y

 

 

 

 

SYSCLK5

 

 

/64

 

 

 

 

SYSCLK6

 

 

 

 

To Switch Fabric,

 

/6

 

Peripherals,

 

 

SYSCLK7

Accelerators

 

 

 

 

/z

 

 

 

 

SYSCLK8

 

 

/12

 

 

 

 

SYSCLK9

 

 

/3

 

 

 

 

SYSCLK10

 

 

/6

 

 

 

 

SYSCLK11

 

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