SM320C6455-EP

 

 

 

 

 

 

 

 

FIXED-POINT DIGITAL SIGNAL PROCESSOR

 

 

 

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SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008

 

 

 

 

 

 

 

 

 

Table 4-1. SCR Connection Matrix

 

 

 

TCP2

VCP2

McBSPs

UTOPIA2

CONFIGURATION SCR

PCI

DDR2 MEMORY

EMIFA

MEGAMODULE

 

CONTROLLER

 

 

 

 

 

 

 

 

 

TC0

Y

Y

N

N

N

N

Y

Y

Y

TC1

N

N

Y

Y

Y

Y

Y

Y

Y

TC2

N

N

N

N

N

Y

Y

Y

Y

TC3

N

N

N

N

N

Y

Y

Y

Y

EMAC

N

N

N

N

N

N

Y

Y

Y

HPI

N

N

N

N

Y

N

Y

Y

Y

PCI

N

N

N

N

Y

N

Y

Y

Y

SRIO(1)

N

N

N

N

Y

N

Y

Y

Y

Megamodule

Y

Y

Y

Y

Y

Y

Y

Y

N

(1)Applies to both descriptor and data accesses by the SRIO peripheral.

4.3Configuration Switch Fabric

Figure 4-2shows the connection between the C64x+ Megamodule and the configuration switched central resource (SCR). The configuration SCR is mainly used by the C64x+ Megamodule to access peripheral registers. The data SCR also has a connection to the configuration SCR which allows masters to access most peripheral registers. The only registers not accessible by the data SCR through the configuration SCR are the device configuration registers and the PLL1 and PLL2 controller registers; these can be accessed only by the C64x+ Megamodule.

The configuration SCR uses 32 bit configuration buses running at SYSCLK2 frequency. SYSCLK2 is supplied by the PLL1 controller and is fixed at a frequency equal to the CPU frequency divided by 3.

84

System Interconnect

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Texas Instruments SM320C6455-EP manual Configuration Switch Fabric, SCR Connection Matrix