TNETX3150 datasheet(78/113 Pages) TI1

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TNETX3150/TNETX3150A

ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH

SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

internal and external frame-wrap example (continued)

Step 2.

While the TNETX3150/TNETX3150A is in reset, configure the VLAN mask registers

(0x00A4–0x00C1). For this example, all ports are in the wrap chain.

VLAN0 MASK

0x0002

VLAN1 MASK

0x0004

VLAN2 MASK

0x0008

VLAN3 MASK

0x0010

VLAN4 MASK

0x0020

VLAN5 MASK

0x0040

VLAN6 MASK

0x0080

VLAN7 MASK

0x0100

VLAN8 MASK

0x0200

VLAN9 MASK

0x0400

VLAN10 MASK

0x0800

VLAN11 MASK

0x1000

VLAN12 MASK

0x2000

VLAN13 MASK

0x4000

VLAN14 MASK

0x0001

Step 3.

Start the TNETX3150/TNETX3150A by writing a 1 to the start bit and ensure that the IOBMOD bit

is also 1 (0x21 at address 0x00C3).

Step 4.

Set all ports into full duplex and enable all ports.

Step 5.

Set the BRUN bit to zero (address 0x00A1).

Step 6.

Configure the TNETX3150/TNETX3150A for test mode by writing a 1 to the MTEST bit (address

0x00C2).

Step 7.

Configure the TNETX3150/TNETX3150A for internal wrap mode by writing a 1 to the INTWRAP. The

port that is not wrapped (00, 02, or 14) is used to inject and observe test data frames from internally

wrapped ports. For port 00, write 0x02 at 14, write 0x00DD. For port 02, write 0x04 at address

0x00DD. For port 14, write 0x06 at address 0x00DD.

Step 8.

Transmit a broadcast/multicast frame into the TNETX3150/TNETX3150A port corresponding to the

INTWRAP setting. Whatever is sent into the test port is received by the same port (if the VLAN

frame received and verify that the TNETX3150/TNETX3150A is working correctly.

For external wrap mode, replace steps 7 and 8 with the following:

Step 7.

Configure the TNETX3150/TNETX3150A for external wrap mode by writing 0x08 at address

0x00DD.

Step 8.

Configure all PHY-layer devices except port 00 for internal loopback.

Step 9.

Transmit a broadcast/multicast frame into the TNETX3150/TNETX3150A on port 00. Whatever is

sent into the test port is received by the same port (if the VLAN register settings steer the packet back

to that port). Compare the frame transmitted against the frame received and verify that the

TNETX3150/TNETX3150A is working correctly.

TNETX3150 数据表(PDF) 78 Page - Texas Instruments

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