
COMMERCIALTEMPERATURERANGE
IDTCV136
PROGRAMMABLEFLEXPC CLOCKFORATIRS400
15
PD, POWER DOWN
PD is an asynchronous active high input used to shut off all clocks cleanly prior to clock power. When PD is asserted high all clocks will be driven low before
turning off the VCO. In PD de-assertion all clocks will start without glitches.
PD ASSERTION
PD
CP U 133M Hz
C P U# 133M Hz
SR C 100M Hz
S R C# 100M Hz
US B 48M Hz
PCI 33M Hz
RE F 14.31818
tSU_PD#
PD
CPU
CPU#
SRC
SRC#
PCI
USB
REF
0
Normal
33MHz
48MHz
14.318MHz
1IREF * 2 or float
Float
IREF * 2 or float
Float
Low