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Table 1-20. DSP Power Domains

 

 

Power Domains

Description

 

 

Real-Time Clock Power Domain

This domain powers the real-time clock digital circuits and oscillator pins ( RTC_XI,

(CVDDRTC)

RTC_XO).

 

Nominal supply voltage can be 1.05 V through 1.3 V. Note: This domain must be always

 

powered for proper operation.

 

This domain cannot be regulated internally, external regulation must be provided.

 

 

Core Power Domain

This domain powers the digital circuits that include the C55x CPU, on-chip memory, and

(CVDD)

peripherals.

 

Nominal supply voltage is either 1.05 V or 1.3 V. This domain can be powered from the

 

on-chip DSP_LDO.

 

 

Digital I/O Power Domain 1

This domain powers all I/Os, except the EMIF I/O, USB I/O, USB oscillator I/O, some of

(DVDDEMIF)

the analog related digital pins, and the real-time clock power domain I/O.

 

Nominal supply voltage can be 1.8, 2.5, 2.75, or 3.3 V.

 

This domain cannot be powered by internal LDOs, external regulation must be provided.

 

 

Digital I/O Power Domain 2

This domain powers all EMIF I/O only.

(DVDDIO)

Nominal supply voltage can be 1.8, 2.5, 2.75, or 3.3 V.

 

 

This domain cannot be powered by internal LDOs, external regulation must be provided.

 

 

RTC I/O Power Domain

This domain powers the WAKEUP and RTC_CLKOUT pins.

(DVDDRTC)

Nominal supply voltage can be 1.8, 2.5, 2.75, or 3.3 V.

 

 

This domain cannot be powered by internal LDOs, external regulation must be provided.

 

 

PLL Power Domain

This domain powers the system clock generator PLL.

(VDDA_PLL)

Nominal supply voltage is 1.3 V.

 

 

This domain can be powered from the on-chip analog LDO output pin (ANA_LDOO).

 

 

Analog Power Domain

This domain powers the power management analog circuits and the 10-bit SAR.

(VDDA_ANA)

Nominal supply voltage is 1.3 V.

 

 

This domain can be powered from the on-chip analog LDO output pin (ANA_LDOO).

 

Note: When externally powered, this domain must be always powered for proper

 

operation.

 

 

USB Analog Power Domain

This domain powers the USB analog PHY.

(USB_VDDA1P3)

Nominal supply voltage is 1.3 V. This domain can be powered from on-chip USB_LDO

 

 

output pin (USB_LDOO).

 

 

USB Digital Power Domain

This domain powers the USB digital module.

(USB_VDD1P3)

Nominal supply voltage is 1.3 V. This domain can be powered from on-chip USB_LDO

 

 

output pin (USB_LDOO).

 

 

USB Oscillator Power Domain

This domain powers the USB oscillator.

(USB_VDDOSC)

Nominal supply voltage is 3.3 V.

 

 

This domain cannot be powered by internal LDOs, external regulation must be provided.

 

 

USB Transceiver & Analog Power

This domain powers the USB transceiver.

Domain

Nominal supply voltage is 3.3 V.

(USB_VDDA3P3)

This domain cannot be powered by internal LDOs, external regulation must be provided.

 

 

 

USB PLL Power Domain

This domain powers the USB PLL.

( USB_VDDPLL )

Nominal supply voltage is 3.3 V.

 

 

This domain cannot be powered by internal LDOs, external regulation must be provided.

 

 

LDOI Power Domain (LDOI)

This domain powers LDOs, POR comparator, and I/O supply for some pins.

 

Nominal supply voltage is 1.8 V through 3.6 V. Note: This domain must be always

 

powered for proper operation.

 

 

1.5.3 Clock Management

As mentioned in Section 1.3.2, there are several clock domains within the DSP. The device supports clock gating features that allows software to disable clocks to entire clock domains or modules within a domain in order to reduce the domain'sactive power consumption to very-near zero (a very small amount of logic will still see a clock).

34

System Control

SPRUFX5A –October 2010 –Revised November 2010

 

 

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Texas Instruments TMS3320C5515 manual Clock Management, DSP Power Domains, Power Domains Description

TMS3320C5515 specifications

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