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Texas Instruments TMS320C6712D warranty PLL and PLL controller

Models: TMS320C6712D

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SPRS293A − OCTOBER 2005 − REVISED NOVEMBER 2005

PLL and PLL controller

The TMS320C6712D includes a PLL and a flexible PLL controller peripheral consisting of a prescaler (D0) and four dividers (OSCDIV1, D1, D2, and D3). The PLL controller is able to generate different clocks for different parts of the system (i.e., DSP core, Peripheral Data Bus, External Memory Interface, McASP, and other peripherals). Figure 8 illustrates the PLL, the PLL controller, and the clock generator logic.

+3.3 V

EMI filter

For Use in System

C1 C2

10 ∝F 0.1 ∝F

PLLHV

CLKMODE0

 

 

 

 

 

 

 

CLKIN

 

 

 

PLLOUT

 

 

 

 

 

 

 

 

 

 

 

 

PLLREF

 

 

 

 

 

 

DIVIDER D0

 

PLLEN (PLL_CSR.[0])

 

1

/1, /2,

PLL

 

 

 

 

 

..., /32

1

DIVIDER D1†

 

 

0

ENA

x4 to x25

 

Reserved

/1, /2,

 

SYSCLK1

 

 

0

 

 

 

 

 

 

 

 

 

 

 

..., /32

 

(DSP Core)

 

 

 

D1EN (PLLDIV1.[15])

ENA

 

 

 

 

D0EN (PLLDIV0.[15])

 

DIVIDER D2†

 

 

 

 

/1, /2,

 

 

 

 

 

 

 

 

SYSCLK2

 

 

 

 

 

..., /32

 

 

OSCDIV1

 

 

 

 

(Peripherals)

CLKOUT3

 

D2EN (PLLDIV2.[15])

ENA

 

/1, /2,

 

 

 

 

 

 

 

 

 

 

 

..., /32

 

 

 

DIVIDER D3

 

 

ENA

 

 

 

 

 

 

 

 

/1, /2,

 

 

OD1EN (OSCDIV1.[15])

 

 

..., /32

 

SYSCLK3

 

 

ENA

 

 

 

 

D3EN (PLLDIV3.[15])

 

ECLKIN

 

 

 

 

 

 

 

 

 

 

 

(EMIF Clock Input)

 

 

 

1

0

EKSRC Bit

 

 

 

 

 

 

 

(DEVCFG.[4])

C6712D DSP

 

 

 

EMIF

 

 

 

 

 

 

 

 

 

 

 

 

 

ECLKOUT

†Dividers D1 and D2 must never be disabled. Never write a “0” to the D1EN or D2EN bits in the PLLDIV1 and PLLDIV2 registers.

NOTES: A. Place all PLL external components (C1, C2, and the EMI Filter) as close to the C67xDSP device as possible. For the best performance, TI recommends that all the PLL external components be on a single side of the board without jumpers, switches, or components other than the ones shown.

B.For reduced PLL jitter, maximize the spacing between switching signals and the PLL external components (C1, C2, and the EMI Filter).

C.The 3.3-V supply for the EMI filter must be from the same 3.3-V power plane supplying the I/O voltage, DVDD.

D.EMI filter manufacturer TDK part number ACF451832-333, -223, -153, -103. Panasonic part number EXCCET103U.

Figure 8. PLL and Clock Generator Logic

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Texas Instruments TMS320C6712D warranty PLL and PLL controller
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TMS320C6712D specifications

The Texas Instruments TMS320C6712D is a high-performance, fixed-point digital signal processor (DSP) that belongs to the TMS320C6000 family, well known for its advanced processing capabilities tailored for demanding signal processing applications. Launched in the early 2000s, the C6712D combines high computational power with a rich set of features, making it suitable for a variety of applications such as telecommunications, audio processing, and industrial control systems.

One of the standout characteristics of the TMS320C6712D is its architecture, which is based on a highly efficient VLIW (Very Long Instruction Word) design. This architecture allows the processor to execute multiple instructions in a single clock cycle, significantly increasing performance. The device operates at clock speeds of up to 150 MHz, providing substantial computational throughput that can handle complex algorithms and real-time processing tasks.

Another key feature of the TMS320C6712D is its 32-bit fixed-point processing capabilities, which allows it to perform difficult mathematical computations efficiently. With an instruction set optimized for DSP applications, the processor includes specialized instructions for multiplying and accumulating operations, as well as support for advanced filtering and generation of audio signals.

The C6712D offers an extensive memory architecture, supporting up to 128 MB of external memory via a 32-bit data bus. It features on-chip SRAM, which provides fast access to data and program storage, enhancing the system's overall performance. Additionally, the device includes a powerful set of peripherals, such as dual asynchronous serial ports (UART), I2C interfaces, and DSP-specific interfaces that facilitate connectivity with other components and systems.

Power consumption is another vital aspect of the TMS320C6712D. It incorporates technologies allowing for low-power operation, which is essential for portable and battery-operated devices. The capability to operate in various power modes helps optimize performance while minimizing energy usage.

In conclusion, the Texas Instruments TMS320C6712D is a versatile and powerful DSP that excels in high-performance applications. Its VLIW architecture, fixed-point processing capabilities, extensive memory options, and low power consumption make it an ideal choice for engineers looking to implement complex signal processing tasks efficiently. Whether used in telecommunications, audio processing, or industrial applications, the C6712D remains a reliable and capable solution in the digital signal processing landscape.