AMD 10, 27493 Input Time to Acquire, Input Time to Reacquire, Signal Rise Time, Signal Fall Time

Preliminary Information

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

Table 16. General AC and DC Characteristics (continued)

Symbol		Parameter Description	Condition		Min	Max	Units	Notes
TBIT		Input Time to Acquire			20.0		ns	7, 8
TRPT		Input Time to Reacquire			40.0		ns	9–13
TRISE		Signal Rise Time			1.0	3.0	V/ns	6
TFALL		Signal Fall Time			1.0	3.0	V/ns	6
CPIN		Pin Capacitance			4	12	pF
TVALID		Time to data valid				100	ns	14
Notes:
1.	Characterized across DC supply voltage range.
2.	Values specified at nominal VCC_CORE . Scale parameters between VCC_CORE. minimum and VCC_CORE. maximum.
3.	IOL and IOH are measured at VOL maximum and VOH minimum, respectively.
4.	Synchronous inputs/outputs are specified with respect to RSTCLK and RSTCK# at the pins.
5.	These are aggregate numbers.
6.	Edge rates indicate the range over which inputs were characterized.
7.	In asynchronous operation, the signal must persist for this time to enable capture.
8.	This value assumes RSTCLK period is 10 ns ==> TBIT = 2*fRST.
9.	The approximate value for standard case in normal mode operation.
10.	This value is dependent on RSTCLK frequency, divisors, Low Power mode, and core frequency.
11.	Reassertions of the signal within this time are not guaranteed to be seen by the core.
12.	This value assumes that the skew between RSTCLK and K7CLKOUT is much less than one phase.
13.	This value assumes RSTCLK and K7CLKOUT are running at the same frequency, though the processor is capable of other
	configurations.
14.	Time to valid is for any open-drain pins. See requirements 7 and 8			in the “Power-Up Timing Requirements“ chapter for more
	information.

Chapter 8 Electrical Data 37