Intel 41210 User Manual

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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 1K
Ω 
pull-down 
resistor.
RESERVED[8:1]
I
Reserved: (8 pins) These input pins should be pulled low
Use an approximately 8.2K
Ω 
resistor to pull-down to ground.
NC[19:18], NC[16:1]
A_NC[10:1]
B_NC[10:1]
O
No 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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