RPIXP2850BB Intel, RPIXP2850BB Datasheet - Page 133

• Manufacturer Part Number: RPIXP2850BB
• Manufacturer: Intel

Specifications of RPIXP2850BB

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Operating Supply Voltage (max): 1.575/2.7/3.465V
• Operating Supply Voltage (min): 1.235/2.3/3.135V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

Figure 80.
Table 50.
7.1.2
Hardware Design Guide
Slowport Address/Data Topology
Table 50
Slowport Address/Data Routing Guidelines
Flash Memory and Microprocessor Interface Support
The Slowport supports two types of interfaces: the flash memory interface and the microprocessor
interface. Two chip-select signals, SP_CS[1:0], differentiate between the two interfaces. The total
address window for the Slowport is 64 Mbytes, which is divided into two 32-Mbyte regions, one
region for each interface. Access to the lower 32-Mbyte region of address space is decoded with
SP_CS[0], while access to the upper 32-Mbyte region of microprocessor space is decoded with
SP_CS[1]. Using these two signals, the glue logic distinguishes between accesses to each interface.
Refer to the Intel® IXP2800 Network Processor Hardware Reference Manual for additional details
about the Slowport unit.
Signal Group
Topology
Reference Plane
Characteristic Trace Impedance
Nominal Trace Width
Nominal Trace Separation
Group spacing
IXP2800 breakout guideline
Trace Length A
Trace Length B
Trace Length C
Maximum via count per signal
Intel
®
provides routing guidelines for the Slowport address/data routing.
Interface
IXP2800
Egress
Parameter
A
Delay=6ns
CPLD
Address/Data
Point-to-point
Dual-referenced, PWR-SIG-GND
4 mil with 4-mil space for a maximum of 300 mils
60 Ω ± 10%
3.5 mils
9 mils
Isolation from non-Slowport-related signals is 20 mils.
Maximum = 5000 mils.
Maximum = 4000 mils.
Maximum = 250 mils.
8 vias
Routing Guideline
IXP28XX Network Processor
C
C
Media
Connector
Switch
Fabric
Connector
Slowport
3967-01
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