TMS320C6655_15 Datasheet, PDF (116/245 Pages) Texas Instruments – Fixed and Floating-Point Digital Signal Processor

TMS320C6655, TMS320C6657
SPRS814B – MARCH 2012 – REVISED APRIL 2015
www.ti.com
8 Peripheral Information and Electrical Specifications
This chapter covers the various peripherals on the C665x DSP. Peripheral-specific information, timing
diagrams, electrical specifications, and register memory maps are described in this chapter.
8.1 Recommended Clock and Control Signal Transition Behavior
All clocks and control signals must transition between V_IH and V_IL (or between V_IL and V_IH) in a monotonic
manner.
8.2 Power Supplies
The following sections describe the proper power-supply sequencing and timing needed to properly power
on the C665x. The various power supply rails and their primary function is listed in Table 8-1.
NAME
CVDD
CVDD1
VDDT1
VDDT2
DVDD15
VDDR1
VDDR2
VDDR3
VDDR4
DVDD18
AVDDA1
AVDDA2
VREFSSTL
VSS
Table 8-1. Power Supply Rails on C665x
PRIMARY FUNCTION
VOLTAGE
SmartReflex core supply
voltage
0.85 V - 1.1 V
Core supply voltage for memory 1.0 V
array
HyperLink SerDes termination 1.0 V
supply
SGMII/SRIO/PCIE SerDes
termination supply
1.0 V
1.5-V DDR3 IO supply
1.5 V
HyperLink SerDes regulator
supply
1.5 V
PCIE SerDes regulator supply 1.5 V
SGMII SerDes regulator supply 1.5 V
SRIO SerDes regulator supply 1.5 V
1.8-V IO supply
Main PLL supply
DDR3 PLL supply
0.75-V DDR3 reference voltage
Ground
1.8V
1.8 V
1.8 V
0.75 V
GND
NOTES
Includes core voltage for DDR3 module
Fixed supply at 1.0 V
Filtered version of CVDD1. Special considerations for noise. Filter is
not needed if HyperLink is not in use.
Filtered version of CVDD1. Special considerations for noise. Filter is
not needed if SGMII/SRIO/PCIE is not in use.
Filtered version of DVDD15. Special considerations for noise. Filter is
not needed if HyperLink is not in use.
Filtered version of DVDD15. Special considerations for noise. Filter is
not needed if PCIE is not in use.
Filtered version of DVDD15. Special considerations for noise. Filter is
not needed if SGMII is not in use.
Filtered version of DVDD15. Special considerations for noise. Filter is
not needed if HyperLink is not in use.
Filtered version of DVDD18. Special considerations for noise.
Filtered version of DVDD18. Special considerations for noise.
Should track the 1.5-V supply. Use 1.5 V as source.
116 Peripheral Information and Electrical Specifications
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