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Intel® i960® RM/RN I/O Processor
®
Intel
80960RM/RN Processor Signals Requiring Pull-Up/Down Resistors
8.0
Intel
Requiring Pull-Up/Down Resistors
Table 8-12
and the recommended resistor values.
Table 8-12.
Memory Controller, Core and JTAG Signals
RAD[6]/RST_MODE#
RAD[4]/STEST
RAD[3]/RETRY
RAD[2]/32BITMEM_EN#
RAD[1]/32BITPCI_EN#
TRST#
NOTES:
1. Pull-down only if other than default Reset Mode is required.
2. Pull-down only if the memory controller is required to support the 32-bit SDRAM protocol for access to
SDRAM memory.
3. Pull-down only if the secondary PCI bus is required to function as a 32-bit bus.
2
Table 8-13.
I
C Bus Signals
Signal
Table 8-14.
PCI Signals (Sheet 1 of 2) (Sheet 1 of 2)
S_SERR#
S_TRDY#
S_LOCK#
S_PERR#
S_DEVSEL#
32
®
80960RM/RN Processor Signals
through
Table 8-14
identify the signals that require pull-up and/or pull-down resistors
Resistor Value
Signal
(in Ohms)
1.5K
2.7K
1.5K
1.5K
1.5K
NMI#
2.7K
1.5K
Resistor value
(in Ohms)
SCL
2.7K
SDA
2.7K
Resistor value
Signal
(in Ohms)
2.7K
2.7K
2.7K
2.7K
2.7K
Pull-up or Pull-down
1
Pull-down
Pull-up or Pull-down
1
Pull-down
2
Pull-down
3
Pull-down
*
Pull-up
Pull-down
Pull-up or Pull-down
pull-up
pull-up
Pull-up or
Pull-down
pull-up
pull-up
pull-up
pull-up
pull-up
Comments
Dependent on which reset
mode is desired. This signal has
an internal pull-up.
Pull-up to enable
RAD[4]/STEST, pull-down to
disable.
Dependent on which reset
mode is desired. This signal has
an internal pull-up.
Pull-down for 32-bit SDRAM
protocol. This signal has an
internal pull-up.
Pull-down for 32-bit SPCI bus
protocol. This signal has an
internal pull-up.
Alternatively this signal may be
tied to P_RST#.
Comments
2
When I
C unit is not used
2
When I
C unit is not used
Comments
On Secondary Bus
On Secondary Bus
On Secondary Bus
On Secondary Bus
On Secondary Bus
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