22 Intel® 41210 Serial to Parallel PCI Bridge Developer’s Manual

Signal Description
2.9 Miscellaneous Pins

Table 9. Miscellaneous Pins

Signal I/O Description
CFGRST# O
Configuration Reset: This signal is asserted low when ever the bridge goes
through a fundemental reset (PERST#, RSTIN#, or PCI Express Reset). This
signal should be used to indicate when the local initialization methods should be
executed.
Refer to the Intel® 41210 Serial to Parallel PCI Bridge Design Guide for more
information.
PERST# I PCI Express Fundamental Reset: When low, asynchronously resets the
internal logic (including sticky bits).
RSTIN# I Reset In: When Asserted, this signal asynchronously resets the internal logic
and asserts X_RST# output for both PCI interfaces. This signal should be pulled
high for adapter card usage.
TCK I TAP Clock In: This is the input clock to the JTAG TAP controller. Acceptable
frequency is 0-16MHz
If not utilizing JTAG, this signal can be left as a no connect.
TDI I
Test Data In: This is the serial data input to the JTAG BSCAN shift register
chain and to the JTAG BSCAN control logic. This is latched in on the rising edge
of TCK.
If not utilizing JTAG, this signal can be left as a no connect.
TDO O Test Data Output: This is the serial data output from the JTAG BSCAN logic
If not utilizing JTAG, this signal can be left as a no connect.
TMS I Test Mode Select: This signal controls the TAP controller state machine to
move to different states and is sampled on the rising edge of TCK.
If not utilizing JTAG, this signal can be left as a no connect.
TRST# I
Test Reset In: This signal is used to asynchronously reset the JTAG BSCAN
logic.
If not utilizing JTAG, connect this signal to ground through a 1KΩ pull-down
resistor.
RESERVED[8:1] I Reserved: (8 pins) These input pins should be pulled low
Use an approximately 8.2KΩ resistor to pull-down to ground.
NC[19:18], NC[16:1]
A_NC[10:1]
B_NC[10:1] ONo Connect: (39 pins) These output pins should be left floating
NC[17] O This signal requires an external pull-up, 8.2K ohm to 3. 3V
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