21554AA Intel, 21554AA Datasheet - Page 11

• Manufacturer Part Number: 21554AA
• Manufacturer: Intel

Specifications of 21554AA

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Table 1-3.
1.7
21554 PCI-to-PCI Non-Transparent Bridge Evaluation Board User’s Guide
Table 1-3
connector pins and shows the resistors and jumpers needed to configure the clocks.
Clock Configuration Jumpers
a.
Clamping Voltage
Table 1-4
jumper resistors designate the secondary bus as a 3.3V or a 5V PCI device. A mix of 3.3 and 5 V
cards is not allowed.
Table 1-4.
Connects p_clk to test pod J18 pin 9.
21554 s_clk_o as local clock.
Output of clock buffer as s_clk_i.
System slot drives s_clk_i on the 21554.
Use Oscillator as asynchronous local clock.
System slot provides the local clock.
Clock buffer provides the local clock.
Install for test purposes only. Remove for normal operation.
shows the connections required to allow observation of these signals at scope pod
shows the configuration of resistor jumpers needed for a specific s_ vio voltage. These
Voltage Clamp
a.
Clamping Voltage
3.3V s_vio
5V s_vio
Function
Only one jumper resistor (R95 or R97) may be installed at a
time. Installing both or no jumper resistors is not allowed.
Figure 1-3
a
shows the location of the resistor jumpers.
Installed
R41
R63
Removed
R63
R41
R97, R98, R99, R100
R90, R91, R92, R93
R65, R66
Installed
R61
R66
R67
R73
a
R90, R91, R92, R93
R97, R98, R99, 100
Removed
R67, R73
R65, R67
R61
R67
R66
Introduction
1-11