IXP2400 Intel, IXP2400 Datasheet - Page 69

• Manufacturer Part Number: IXP2400
• Manufacturer: Intel

Specifications of IXP2400

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

3.3.3
3.3.4
Datasheet
SlowPort Clock Behavior During Reset
In IXP2400 A0 silicon, when the SYS_RESET_L or the PCI_RST_L is asserted, the SP_CLK
drives out the clock signal at the same frequency as the SYS_CLK, but 180 degrees out of phase
with the SYS_CLK. After the de-assertion of both SYS_RESET_L (and PCI_RST_L if
CFG_RSTDIR = 1), the SP_CLK will drive out the clock signal at half of the SYS_CLK frequency
after approximately three SYS_CLK cycles, or at the programmed frequency.
Pullup/Pulldown and Unused Pin Guidelines
For normal (i.e., non-test mode) operation, terminate signals as follows:
Typical pullup/pulldown resistor values are in the range of 5-10 Kohms.
For unused QDR SRAM channels, the output pins can be left unconnected (no connect). The input
pins need to be tied to ground with a 100-Kohm resistor. Similarly, for unused MSF channels, the
output pins can be left unconnected (no connect); the input pins need to be tied to ground with a
100-Kohm resistor.
Intel
®
IXP2400 Network Processor
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