Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 - Manual (Page 296)

14−6
14.5 PCI Clock/Reset Timing Requirements Over Recommended Ranges of Supply
Voltage and Operating Free-Air Temperature
PARAMETER
ALTERNATE
SYMBOL
TEST CONDITIONS MIN MAX UNIT
tc Cycle time, PCLK tcyc 30 ns
tw(H) Pulse duration (width), PCLK high thigh 11 ns
tw(L) Pulse duration (width), PCLK low tlow 11 ns
tr, tf Slew rate, PCLK ∆ v/ ∆ t 1 4 V/ns
tw Pulse duration (width), GRST trst 1 ms
tsu Setup time, PCLK active at end of PRST trst-clk 100 m s
14.6 Switching Characteristics for PHY Port Interface
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Jitter, transmit Between TPA and TPB ± 0.15 ns
Skew, transmit Between TPA and TPB ± 0.10 ns
tr TP differential rise time, transmit 10% to 90%, at 1394 connector 0.5 1.2 ns
tf TP differential fall time, transmit 90% to 10%, at 1394 connector 0.5 1.2 ns
14.7 Operating, Timing, and Switching Characteristics of XI
PARAMETER MIN TYP MAX UNIT
VDD 3.0 3.3 3.6 V (PLLVCC)
VIH High-level input voltage 0.63 VCC V
VIL Low-level input voltage 0.33 VCC V
Input clock frequency 24.576 MHz
Input clock frequency tolerance <100 PPM
Input slew rate 0.2 4 V/ns
Input clock duty cycle 40% 60%
14.8 PCI Timing Requirements Over Recommended Ranges of Supply Voltage and
Operating Free-Air Temperature
This data manual uses the following conventions to describe time ( t ) intervals. The format is t
A
, where subscript A
indicates the type of dynamic parameter being represented. One of the following is used: t
pd
= propagation delay time,
t
d
(t
en
, t
dis
) = delay time, t
su
= setup time, and t
h
= hold time.
PARAMETER
ALTERNATE
SYMBOL
TEST CONDITIONS MIN MAX UNIT
tpd Propagation delay time, See Note 4
PCLK-to-shared signal
valid delay time
tval
CL = 50 pF,
11
ns tpd Propagation delay time, See Note 4
PCLK-to-shared signal
invalid delay time
tinv
CL = 50 pF,
See Note 4
2
ns
ten Enable time, high impedance-to-active delay time from PCLK ton 2 ns
tdis Disable time, active-to-high impedance delay time from PCLK toff 28 ns
tsu Setup time before PCLK valid tsu 7 ns
th Hold time after PCLK high th 0 ns
NOTE 4: PCI shared signals are AD31−AD0, C/BE3−C/BE0, FRAME, TRDY, IRDY, STOP, IDSEL, DEVSEL, and PAR.