Texas Instruments TMS3320C5515 manual Clkout Pin, Src, Bit Field Value Description

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System Clock Generator

When the PLL is powered up (PLL_PWRDN = 0), the PLL will start its phase-locking sequence. You must keep the clock generator in BYPASS MODE for at least 4 mS while the phase-locking sequence is ongoing. See Section 1.4.3.2 for more details on the PLL_MODE of the clock generator.

1.4.2.3CLKOUT Pin

For debug purposes, the DSP includes a CLKOUT pin which can be used to tap different clocks within the clock generator. The SRC bits of the CLKOUT control source register (CCSSR) can be used to specify the source for the CLKOUT pin (see Figure 1-5and Table 1-6).

NOTE: There is no internal logic to prevent glitches while changing the CLKOUT source. Also there is no provision for internally dividing down the CLKOUT frequency other than the options inherently available for selecting the CLKOUT source.

The CLKOUT pin'soutput driver is enabled/disabled through the CLKOFF bit of the CPU ST3_55 register. At hardware reset, CLKOFF is cleared to 0 so that the clock is visible for debug purposes. But within the bootloader romcode, CLKOFF is set to 1 to conserve power. After the bootloader finishes, the customer application code is free to re-enable CLKOUT. For more information on the ST3_55 register, see the TMS320C55x 3.0 CPU Reference Guide (SWPU073).

The slew rate (i.e., dV/dt) of the CLKOUT pin can be controlled by the CLKOUTSR bits in the output slew rate control register (OSRCR). This feature allows for additional power savings when the CLKOUT pin does not need to drive large loads.

Figure 1-5. CLKOUT Control Source Select Register (CCSSR) [1C24h]

15

4

3

0

Reserved

 

 

SRC

 

 

 

 

R-0

 

 

R/W-Bh

LEGEND: R/W = Read/Write; R = Read only; -n= value after reset

Table 1-6. CLKOUT Control Source Select Register (CCSSR) Field Descriptions

Bit

Field

Value

Description

 

 

 

 

15-4

Reserved

0

Reserved.

 

 

 

 

3-0

SRC

 

CLKOUT source bits. These bits specify the source clock for the CLKOUT pin.

 

 

0

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

1h

CLKOUT pin is set high.

 

 

2h

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

3h

CLKOUT pin is set low.

 

 

4h

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

5h

CLKOUT pin is set low.

 

 

6h

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

7h

CLKOUT pin outputs USB PLL output clock.

 

 

8h

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

9h

CLKOUT pin outputs SAR clock.

 

 

Ah

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

Bh

CLKOUT pin outputs system clock, SYSCLK (default mode).

 

 

Ch

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

Dh

Reserved, do not use.

 

 

Eh

CLKOUT pin outputs System PLL output clock, PLLOUT.

 

 

Fh

CLKOUT pin outputs USB PLL output clock.

 

 

 

 

SPRUFX5A –October 2010 –Revised November 2010

System Control

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Copyright © 2010, Texas Instruments Incorporated

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Contents Users Guide Submit Documentation Feedback Contents List of Figures Submit Documentation Feedback List of Tables Submit Documentation Feedback Submit Documentation Feedback Read This First Related Documentation From Texas Instruments Related Documentation From Texas Instruments Submit Documentation Feedback Functional Block Diagram Block DiagramCPU Core Using FFT Accelerator ROM routinesFFT Hardware Accelerator AddressPeripherals Power ManagementProgram/Data Memory Map System MemoryDaram Blocks On-Chip Dual-Access RAM DaramCPU Byte Address Range DaramSaram Blocks On-Chip Single-Access RAM SaramSaram Sarom Blocks On-Chip Single-Access Read-Only Memory SaromExternal Memory Asynchronous Emif InterfaceOverview 2 I/O Memory MapDevice Clocking DSP Clocking Diagram Clock Domains Powering Down and Powering Up the System PLL PLL Output Frequency ConfigurationFunctional Description Multiplier and DividersSRC Clkout PinBit Field Value Description DSP Reset Conditions of the System Clock Generator ConfigurationClock Generator During Reset Clock Generator After ResetSetting the System Clock Frequency In the Bypass Mode Register Bits Used in the Bypass ModeEntering and Exiting the PLL Mode Register Bits Used in the PLL ModeCV DD = 1.05 CV DD = 1.3 Clock Signal Name Setting the Output Frequency for the PLL ModeFrequency Ranges for Internal Clocks 10. PLL Clock Frequency RangesLock Time Clock Generator RegistersSoftware Steps To Modify Multiplier and Divider Ratios 12. Clock Generator RegistersClock Generator Control Register 2 CGCR2 1C21h Clock Generator Control Register 1 CGCR1 1C20hClock Generator Control Register 4 CGCR4 1C23h Clock Generator Control Register 3 CGCR3 1C22hInit 17. Clock Configuration Register 1 CCR1 Field Descriptions Clock Configuration Register 1 CCR1 1C1EhClock Configuration Register 2 CCR2 1C1Fh 18. Clock Configuration Register 2 CCR2 Field Descriptions19. Power Management Features Power DomainsPower Domains Description 20. DSP Power DomainsClock Management Daram CPU Domain Clock GatingHwai Iporti Mporti Xporti Dporti Idlecfg Cpui 21. Idle Configuration Register ICR Field DescriptionsHwai 22. Idle Status Register Istr Field Descriptions Valid Idle Configurations23. CPU Clock Domain Idle Requirements Peripheral Domain Clock Gating Clock Configuration ProcessTo Idle the Following Module/Port XportSysclkdis MMCSD0CG DMA0CG Uartcg Spicg I2S3CGMMCSD0CG Anaregcg Anaregcg DMA3CG DMA2CG DMA1CG Usbcg Sarcg LcdcgUrtclkstpreq UrtclkstpackUsbclkstpack UsbclkstpreqUSB Domain Clock Gating Clock Generator Domain Clock GatingBit Field Emfclkstpack27. USB System Control Register Usbscr Field Descriptions USB System Control Register Usbscr 1C32hUsbpwdn Usbsessend Usbvbusdet Usbpllen UsbpwdnUsbdatpol RTC Domain Clock GatingUsboscbiasdis UsboscdisRTC Power Management Register Rtcpmgt 1930h Static Power Management29. RTC Interrupt Flag Register Rtcintfl Field Descriptions RTC Interrupt Flag Register Rtcintfl 1920hRAM Sleep Mode Control Register 1 RAMSLPMDCNTLR1 1C28h Internal Memory Low Power ModesMode CV DD Voltage 30. On-Chip Memory Standby Modes21. RAM Sleep Mode Control Register2 0x1C2A 31. Power Configurations Power ConfigurationsDV DDRTC, Ldoi IDLE3IDLE2 Procedure Core Voltage Scaling IDLE3 ProcedureHEX Bytes 32. Interrupt Table33. IFR0 and IER0 Bit Descriptions IFR and IER Registers34. IFR1 and IER1 Bit Descriptions Interrupt TimingRtos Dlog Berr I2C Emif Gpio USB SPI RTC RCV3 XMT3 RtosGpio Interrupt Enable and Aggregation Flag Registers Timer Interrupt Aggregation Flag Register Tiafr 1C14hDMA Interrupt Enable and Aggregation Flag Registers 35. Die ID Registers Device Identification36. Die ID Register 0 DIEIDR0 Field Descriptions Die ID Register 0 DIEIDR0 1C40hDie ID Register 1 DIEIDR1 1C41h 37. Die ID Register 1 DIEIDR1 Field Descriptions39. Die ID Register 3 DIEIDR3150 Field Descriptions Die ID Register 3 DIEIDR3150 1C43hDie ID Register 4 DIEIDR4 1C44h 40. Die ID Register 4 DIEIDR4 Field Descriptions42. Die ID Register 6 DIEIDR6 Field Descriptions Die ID Register 6 DIEIDR6 1C46hDie ID Register 7 DIEIDR7 1C47h 43. Die ID Register 7 DIEIDR7 Field DescriptionsExternal Bus Selection Register Ebsr Device Configuration44. Ebsr Register Bit Descriptions Field Descriptions LDO Control LDO Control Register 7004hA17MODE A16MODE45. Rtcpmgt Register Bit Descriptions Field Descriptions 47. LDO Controls Matrix 46. Ldocntl Register Bit Descriptions Field DescriptionsRtcpmgt Register Ldocntl Register Bgpd Bit Ldopd Bit Usbldoen BitClkoutsr Output Slew Rate Control Register Osrcr 1C16hEmifsr S05PD S04PD S03PD S02PD S01PD S00PD S15PD S14PD S13PD S12PD S11PD S10PDS15PD S05PDA20PD A19PD A18PD A17PD A16PD A15PD INT1PU INT0PU Resetpu EMU01PU Tdipu Tmspu TckpuINT1PU PD15PD A20PDDMA Controller Configuration DMA Synchronization Events DMA Configuration Registers52. Channel Synchronization Events for DMA Controllers 53. System Registers Related to the DMA Controllers54. DMA Interrupt Flag Register Dmaifr Field Descriptions 55. DMA Interrupt Enable Register Dmaier Field DescriptionsCH1EVT Peripheral ResetCH0EVT CH3EVTPeripheral Reset Control Register Prcr 1C05h Peripheral Software Reset Counter Register Psrcr 1C04hCount PG4RSTPG3RST Emif and USB Byte Access61. Effect of Usbscr Bytemode Bits on USB Access 60. Effect of Bytemode Bits on Emif AccessesBytemode Setting CPU Access to USB Register Emif System Control Register Escr 1C33h63. Emif Clock Divider Register Ecdr Field Descriptions Emif Clock Divider Register Ecdr 1C26hEdiv DSP Products ApplicationsRfid

TMS3320C5515 specifications

The Texas Instruments TMS3320C5515 is a highly specialized digital signal processor (DSP) designed for a wide range of applications, including telecommunications, audio processing, and other signal-intensive tasks. As part of the TMS320 family of DSPs, the TMS3320C5515 leverages TI's extensive experience in signal processing technology, delivering robust performance and reliability.

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Overall, the Texas Instruments TMS3320C5515 stands out as a powerful DSP solution, equipped with features that cater to the needs of various industries. Its combination of performance, efficiency, and versatile application makes it an attractive choice for engineers working in signal processing.
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