Intel IXP45X manual 3.15Power, 3.14.3Device Connection, Intel IXP46X

General Hardware Design Considerations—Intel®IXP45X and Intel® IXP46X Product Line of Network Processors

3.14.3Device Connection

Figure 18. Clock Oscillator Interface Example

			3.3 V
OSC_IN	OUT	VDD
	33 Ω		10 KΩ
		ON
			0.01 µF
		33.33 MHz
OSC_OUT
Intel® IXP46X
Product Line of
Network Processors
			B4111 -001

3.15Power

To enable low power system design, the IXP45X/IXP46X network processors have separate power supply domains for the processor core, DDR SDRAM memory, and input/output peripherals.

Table 24. Power Interface (Sheet 1 of 2)

Name	Nominal	Description
	Voltage
		Core supply voltage.
VCC	1.3 V	Note: If operating at 667MHz, core supply voltage must be increased to VCC = 1.5 V. For details, see
		the Intel® IXP45X and Intel® IXP46X Product Line of Network Processors Datasheet.
VCCP	3.3 V	I/O supply voltage.
VCCM	2.5 V	DDR memory interface supply voltage.
VSS	GND	Ground for supply voltages 3.3 V, 2.5 V, and 1.3/1.5 V.
		Supply voltage for peripheral (I/O) logic of analog oscillator circuitry.
OSC_VCCP	3.3 V	Require special power filtering circuitry. See the Intel® IXP45X and Intel® IXP46X Product Line of
		Network Processors Datasheet.
		Ground for peripheral (I/O) logic of analog oscillator circuitry. Used in conjunction with the OSC_VCCP
OSC_VSSP	GND	pins.
		Require special power filtering circuitry. See the Intel® IXP45X and Intel® IXP46X Product Line of
		Network Processors Datasheet.
		Supply voltage for internal logic of the analog oscillator circuitry. Requires special power filtering
OSC_VCC	1.3 V	circuitry. If operating at 667 MHz, this voltage must be increased to 1.5 V.
		See the Intel® IXP45X and Intel® IXP46X Product Line of Network Processors Datasheet.
		Ground for internal logic of the analog oscillator circuitry. Used in conjunction with the OSC_VCC pins.
OSC_VSS	GND	Require special power filtering circuitry. See the Intel® IXP45X and Intel® IXP46X Product Line of
		Network Processors Datasheet.

	Intel® IXP45X and Intel® IXP46X Product Line of Network Processors
February 2007	HDD
Document Number: 305261; Revision: 004	55