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SPRS457E
– MARCH 2009 – REVISED JUNE 2011
6.2
Recommended Clock and Control Signal Transition Behavior
All clocks and control signals should transition between VIH and VIL (or between VIL and VIH) in a
monotonic manner.
6.3
Power Supplies
The power supplies are summarized in
Table 6-1.
Table 6-1. Power Supplies
CUSTOMER
TOLERANCE
PACKAGE
DEVICE PLANE
DESCRIPTION
BOARD SUPPLY
PLANE
1.2V or 1.35V
±5%
1.2V or 1.35V
CVDD
Core power supply
VDD12_PRTCSS
RTC oscillator power supply
PWR CTRL power supply
PWR CTRL 1.2-V or 1.35-V I/O power supply
VDDA12_DAC
DAC 1.2-V or 1.35-V analog power supply
VPP
VPP power supply
1.8 V
±5%
1.8 V
VDD18_PRTCSS
PWR CTRL 1.8-V power supply
VDDMXI
MXI1 (oscillator) 1.8-V power supply
VDD18_SLDO
Power supply for internal RAM
For proper device operation, this pin must be connected to VDDS18.
VDD18_DDR
1.8-V DDR2 Supply Voltage
VDDA18_PLL
1.8-V PLL Analog Supply Voltage
VDDA18_USB
1.8-V USB Analog Supply Voltage
VDDA18_VC
1.8-V Voice Codec Module Analog Supply Voltage
VDDA18_DAC
1.8-V DAC Analog Supply Voltage
VDDS18
1.8-V Supply Voltage
VDDA18_ADC
1.8-V ADC Supply Voltage
3.3 V
±5%
3.3 V
VDDS33
3.3-V I/O Supply Voltage
VDDA33_USB
3.3-V USB Analog Supply Voltage
VDDA33_VC
3.3-V Voice Codec Module Analog Supply Voltage
1.8/3.3 V
±5%
1.8/3.3 V
VDD_AEMIF1_18_33
Switchable 3.3/1.8-V EMIF1 Supply Voltage (1)
Note: Power supply is switchable for AEMIF and its multiplexed
peripherals (3.3/1.8 V) (2).
VDD_AEMIF2_18_33
Switchable 3.3/1.8-V EMIF2 Supply Voltage (3)
Note: Power supply is switchable for AEMIF and its multiplexed
peripherals (3.3/1.8 V) (2).
VDD_ISIF18_33
Switchable 3.3/1.8-V ISIF Supply Voltage (4)
Note: Power supply is switchable for ISIF and its multiplexed
peripherals (3.3V/1.8V)(5)
0 V
VSS_MX1
Oscillator (MXI1) ground
Note: For proper device operation, connect to external crystal
capacitor ground and must be kept separate from other grounds.
0 V
VSS_32K
Oscillator (32K) ground
Note: For proper device operation, connect to external crystal
capacitor ground and must be kept separate from other grounds.
0 V
VSS
Ground
(1)
VDD_AEMIF1_18_33 : can be used as a power supply for EM_A[3:13], EM_BA0, EM_BA1, EM_CE[0], EM_ADV, EM_CLK,
EM_D[8:15 ]pins, Keyscan, or GPIO pins.
(2)
Example 1: VDD_AEMIF2_18_33 at 1.8-V for 8-bit NAND VDD_AEMIF1_18_33 at 3.3-V for GPIO.
Example 2: VDD_AEMIF1_18_33 and VDD_AEMIF2_18_33 at 1.8-V for 16-bit NAND.
(3)
VDD_AEMIF2_18_33: can be used as a power supply for EM_A[0:2], EM_CE[1], EM_WE, EM_OE, EM_WAIT, EM_D[0:7] pins, HPI,
Keyscan, or GPIO pins.
(4)
VDD_ISIF_18_33: can be used as a power supply for VPFE pins (CIN[7:0], YIN[7:0], C_WE_FIELD, PCLK), or SPI3
(SPI3_SCLK,SPI3_SIMO,SPI3_SCS[0], SPI3_SCS[1]) or USBDRVVBUS or GPIO pins.
(5)
Example 1 VDD_ISIF_18_33 power supply can be at 1.8V for VPFE pin functionality or it can be at 3.3V if other peripherals pin functionality
is to be used like SPI3 or GPIO or CLKOUT0, or USBDRVVBUS.
Copyright
2009–2011, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
77