Datasheet

AM1808
www.ti.com SPRS653E –FEBRUARY 2010–REVISED MARCH 2014
5.3 Recommended Operating Conditions
NAME DESCRIPTION CONDITION MIN NOM MAX UNIT
CVDD Core Logic Supply Voltage (variable) 1.3V operating point 1.25 1.3 1.35 V
1.2V operating point 1.14 1.2 1.32 V
1.1V operating point 1.05 1.1 1.16 V
1.0V operating point 0.95 1.0 1.05 V
456 MHz versions 1.25 1.3 1.35
RVDD Internal RAM Supply Voltage V
375 MHz versions 1.14 1.2 1.32
RTC_CVDD
(1)
RTC Core Logic Supply Voltage 0.9 1.2 1.32 V
PLL0_VDDA PLL0 Supply Voltage 1.14 1.2 1.32 V
PLL1_VDDA PLL1 Supply Voltage 1.14 1.2 1.32 V
SATA_VDD SATA Core Logic Supply Voltage 1.14 1.2 1.32 V
USB_CVDD USB0, USB1 Core Logic Supply Voltage 1.14 1.2 1.32 V
USB0_VDDA18 USB0 PHY Supply Voltage 1.71 1.8 1.89 V
USB0_VDDA33 USB0 PHY Supply Voltage 3.15 3.3 3.45 V
USB1_VDDA18 USB1 PHY Supply Voltage 1.71 1.8 1.89 V
Supply
USB1_VDDA33 USB1 PHY Supply Voltage 3.15 3.3 3.45 V
Voltage
DVDD18
(2)
1.8V Logic Supply 1.71 1.8 1.89 V
SATA_VDDR SATA PHY Internal Regulator Supply Voltage 1.71 1.8 1.89 V
DDR_DVDD18
DDR2 PHY Supply Voltage 1.71 1.8 1.89 V
(2)
0.5*
0.49* 0.51*
DDR_VREF DDR2/mDDR reference voltage DDR_DVDD1 V
DDR_DVDD18 DDR_DVDD18
8
DDR2/mDDR impedance control,
DDR_ZP Vss V
connected via 50Ω resistor to Vss
1.8V operating point 1.71 1.8 1.89 V
Power Group A Dual-voltage IO
DVDD3318_A
Supply Voltage
3.3V operating point 3.15 3.3 3.45 V
1.8V operating point 1.71 1.8 1.89 V
Power Group B Dual-voltage IO
DVDD3318_B
Supply Voltage
3.3V operating point 3.15 3.3 3.45 V
1.8V operating point 1.71 1.8 1.89 V
Power Group C Dual-voltage IO
DVDD3318_C
Supply Voltage
3.3V operating point 3.15 3.3 3.45 V
Supply
VSS Core Logic Digital Ground V
Ground
PLL0_VSSA PLL0 Ground V
PLL1_VSSA PLL1 Ground V
SATA_VSS SATA PHY Ground 0 0 0 V
OSCVSS
(3)
Oscillator Ground V
RTC_VSS
(3)
RTC Oscillator Ground V
USB0_VSSA USB0 PHY Ground V
USB0_VSSA33 USB0 PHY Ground V
Voltage
V
IH
High-level input voltage, Dual-voltage I/O, 3.3V
(4)
2 V
Input High
High-level input voltage, Dual-voltage I/O, 1.8V
(4)
0.65*DVDD V
High-level input voltage, RTC_XI 0.8*RTC_CVDD V
High-level input voltage, OSCIN 0.8*CVDD V
V
IL
Low-level input voltage, Dual-voltage I/O, 3.3V
(4)
0.8 V
Voltage
Input Low
Low-level input voltage, Dual-voltage I/O, 1.8V
(4)
0.35*DVDD V
(1) The RTC provides an option for isolating the RTC_CVDD from the CVDD to reduce current leakage when the RTC is powered
independently. If these power supplies are not isolated (CTRL.SPLITPOWER=0), RTC_CVDD must be equal to or greater than CVDD.
If these power supplies are isolated (CTRL.SPLITPOWER=1), RTC_CVDD may be lower than CVDD.
(2) DVDD18 must be powered even if all of the DVDD3318_x supplies are operated at 3.3V
(3) When an external crystal is used oscillator (OSC_VSS, RTC_VSS) ground must be kept separate from other grounds and connected
directly to the crystal load capacitor ground. These pins are shorted to VSS on the device itself and should not be connected to VSS on
the circuit board. If a crystal is not used and the clock input is driven directly, then the oscillator VSS may be connected to board ground.
(4) These IO specifications apply to the dual-voltage IOs only and do not apply to the DDR2/mDDR or SATA interfaces. DDR2/mDDR IOs
are 1.8V IOs and adhere to the JESD79-2A standard.
Copyright © 2010–2014, Texas Instruments Incorporated Specifications 65
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