66AK2E05, 66AK2E02
SPRS865D –NOVEMBER 2012–REVISED MARCH 2015
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11 66AK2E0x Peripheral Information and Electrical Specifications
This chapter covers the various peripherals on the 66AK2E0x 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 66AK2E0x. The various power supply rails and their primary functions are listed in Table 11-1.
Table 11-1. Power Supply Rails on the 66AK2E0x
NAME PRIMARY FUNCTION VOLTAGE NOTES
AVDDAx Core PLL, DDR3 DLL supply voltage 1.8 V Core PLL, DDR3 DLL supply
CVDD SmartReflex SoC core supply voltage 0.8 V to 1.1 V SoC variable core supply
CVDD1 SoC core fixed supply voltage 0.95 V SoC Core fixed supply
DVDD15 DDR3 I/O power supply voltage 1.5/1.35 V DDR3 I/O power supply
DVDD18 1.8-V I/O power supply voltage 1.8 V 1.8-V I/O power supply
USB0DVDD33, USB1DVDD33 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
VDDUSB0, VDDUSB1 USB LV PHY power supply voltage 0.85 V USB LV PHY supply
USB0VP, USB0VPTX, USB0VP, Filtered 0.85-V supply voltage 0.85 V Filtered 0.85-V USB supply
USB0VPTX
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. DVDD15
4. VDDALV, VDDUSBx, USBxVP, USBxVPTX
5. USBxDVDD33
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. DVDD15
5. VDDALV, VDDUSBx, USBxVP, USBxVPTX
6. USBxDVDD33
208 66AK2E0x Peripheral Information and Electrical Specifications Copyright © 2012–2015, Texas Instruments Incorporated
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