39 of 47

March 31, 2008

IDT80KSW0004

Datasheet

Table 34 CPS-12 Reset Port Configuration

Speed Select (SPD[1:0])

There are 2 port speed select pins. These pins are used to chose the initial speed on sRIO ports. The selection table is given below:

Table 35 Port Speed Selection Pin Values

At power-up the CPS-12 is configured as with 12 non-redundant 1x ports. All ports are configured with each link running at 1.25, 2.5, or 3.125 Gbps

(depending on the SPD[1:0] pins).

An end-point connected to the CPS-12 can then reprogram all the ports to the desired configuration. All ports are configured as long run at start up

because it will allow the port to communicate to either a short run or long run port on the CPU.

Initialization of sRIO Switching

At the initialization all values in the route table are programmed as default route. But the CPS-12 accepts maintenance packets. These maintenance

packets may be used to configure the CPS-12.

Lane#

Quad#

Quad

Type

Default

on Reset

1x-Ports Only

Port Numbering

4x-Ports Only

Port Numbering

0

0

Enhanced

Enhanced

0

0

11

22

33

4

1

Enhanced

Enhanced

4

1

55

66

77

8

2

Enhanced

Enhanced

8

2

99

10

10

11

11

Value on the Pins (SPD1, SPD0)

Ports Rate

00

1.25Gbps

01

2.5Gbps

10

3.125Gbps

11

Reserved