AMD 27493, 10, 27488 manual Advanced 333 FSB AMD Athlon System Bus DC Characteristics

Preliminary Information

AMD Athlon™ XP Processor Model 10 Data Sheet 26237C— May 2003

6.4Advanced 333 FSB AMD Athlon™ System Bus DC Characteristics

Table 4 shows the DC characteristics of the AMD Athlon system bus for this processor.

Table 4. Advanced 333 FSB AMD Athlon™ System Bus DC Characteristics

Symbol	Parameter	Condition	Min	Max	Units	Notes
VREF	DC Input Reference Voltage		(0.5 x VCC_CORE)	(0.5 x VCC_CORE)	mV	1
			–50	+50
IVREF_LEAK_P	VREF Tristate Leakage Pullup	VIN = VREF Nominal	–100		∝A
IVREF_LEAK_N	VREF Tristate Leakage Pulldown	VIN = VREF Nominal		100	∝A
VIH	Input High Voltage		VREF +200	VCC_CORE +500	mV
VIL	Input Low Voltage		–500	VREF –200	mV
ILEAK_P	Tristate Leakage Pullup	VIN = VSS	–1		mA
		(Ground)
ILEAK_N	Tristate Leakage Pulldown	VIN = VCC_CORE		1	mA
		Nominal
CIN	Input Pin Capacitance		4	7	pF
RON	Output Resistance		0.90 x RsetN,P	1.1 x RsetN,P	Ω	2
RsetP	Impedance Set Point, P Channel		40	70	Ω	2
RsetN	Impedance Set Point, N Channel		40	70	Ω	2

Notes:

1. VREF is nominally set to 50% of VCC_CORE with actual values that are specific to motherboard design implementation. VREF must be created with a sufficiently accurate DC source and a sufficiently quiet AC response to adhere to the ± 50 mV specification listed above.

2. Measured at VCC_CORE / 2.

24 Advanced 333 Front-Side Bus AMD Athlon™ XP Processor Model 10 Specifications Chapter 6