Filter
Top Products
System Implementation
1-17
PCI445X Device
Table 1–3.PCI Bus Interface Pullup Resistor List
PCI Signal Pull-Up Voltage
FRAME V
CCP
TRDY V
CCP
IRDY V
CCP
DEVSEL V
CCP
STOP V
CCP
SERR V
CCP
PERR V
CCP
LOCK V
CCP
INTA
INTB
INTC
V
CCP
CLKRUN V
CCP
PRST V
CCP
G_RST V
CCP
PME System dependent
The pullup/pulldown on MFUNC depends on how it is implemented. Some
signals may require pullups, others pulldowns, and for a GPI or GPO only the
system designer would know how that line should be pulled.
Table 1–4.Miscellaneous Terminals Pullup Resistor List
PCI Signal Required Situation Pullup/Pulldown
Voltage
MFUNC7–MFUNC4 N/C or used as output V
CCP
or GND
MFUNC3–MFUNC0
(GPIO3–GPIO0)
N/C or used as output V
CCP
or GND
MFUNC7(LOCK) N/C or used as output V
CCP
CLOCK Internal OSC is selected GND
LATCH If MFUNC7 is used for IDSEL GND
IRQSER V
CCP
RI_OUT/PME System dependent
SUSPEND System dependent
Note: Removing clamping voltage makes all the clamped signals low.