66AK2L06
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SPRS930 –APRIL 2015
11 66AK2L06 Peripheral Information and Electrical Specifications
This chapter covers the various peripherals on the 66AK2L06 device. Peripheral-specific information,
timing diagrams, electrical specifications, and register memory maps are described in this chapter.
11.1 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.
11.2 Power Supplies
The following sections describe the proper power-supply sequencing and timing needed to properly power
on the 66AK2L06. The various power supply rails and their primary functions are listed in Table 11-1.
Table 11-1. Power Supply Rails on the 66AK2L06
NAME PRIMARY FUNCTION VOLTAGE NOTES
AVDDAx Core PLL, DDR3 DLL supply voltage 1.8 V Core PLL, DDR3 DLL supply
CVDD SmartReflex DSP core supply voltage 0.8 - 1.1 V DSP variable core supply
CVDD1 DSP core fixed supply voltage 0.95 V DSP Core fixed supply
DVDDR DDR3A I/O power supply voltage DDR3 I/O DDR3A I/O power supply
supply voltage
DVDD18 1.8-V I/O power supply voltage 1.8 V 1.8-V I/O power supply
DVDD33 USB 3.3-V IO supply 3.3 V USB high voltage supply
VDDAHV SerDes I/O power supply voltage 1.8 V SerDes I/O power supply
VDDALV SerDes analog power supply voltage 0.85 V SerDes analog supply
VDDUSB USB LV PHY power supply voltage 0.85 V USB LV PHY supply
VPH Filtered 3.3-V supply voltage 3.3 V Filtered 3.3-V USB supply
VP, VPTX Filtered 0.85-V supply voltage 0.85 V Filtered 0.85-V USB supply
VSS Ground GND Ground
11.2.1 Power-Up Sequencing
This section defines the requirements for a power-up sequencing from a power-on reset condition. There
are two acceptable power sequences for the device.
The first sequence stipulates the core voltages starting before the IO voltages as shown below.
1. CVDD
2. CVDD1, VDDAHV, AVDDAx, DVDD18
3. DVDDR
4. VDDALV, VDDUSB, VP, VPTX
5. DVDD33, VPH
The second sequence provides compatibility with other TI processors with the IO voltage starting before
the core voltages as shown below.
1. VDDAHV, AVDDAx, DVDD18
2. CVDD
3. CVDD1
4. DVDDR
5. VDDALV, VDDUSB, VP, VPTX
6. DVDD33, VPH
Copyright © 2015, Texas Instruments Incorporated 66AK2L06 Peripheral Information and Electrical Specifications 215
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