IP175G datasheet(18/69 Pages) ETC2

18 / 69 page

IP175G/GI/GH/GHI

Data Sheet

18 / 69

November 27, 2012

IP175Gx-DS-R01.3

4.5

Auto Factory Test (AFT) Mode

IP175G/GH implements an AFT mechanism, which is very useful for switch pre-test as Figure 5

AFT system diagrams. When this function is triggered by hardware pin AFT, IP175G/GH physical ports

are connected either port-pairs loopback or self-loopback and then IP175G/GH will generate frames for

TX of all ports and LED will flash.

For example, port1 and port2 are connected to each other (loopback). Check the LED of port1 and

port2 is light-on, and then trigger this AFT function and wait a moment trigger again. If the test result is

passed (no CRC or packet loss), show LED of port1 and port2 light-on. Otherwise, show LED light-off

when CRC or packet loss is happened.

Procedure:

1. Power On

2. Wait for someone Push AFT button to start test

3. IP175G/GH transmit packet and LED flash

4. If Push AFT button then goto step 5, else goto step 3

5. LED Show the test result, goto step 2

Figure 6

Auto Factory Test Application Diagram

4.6

Reset

Hardware Reset: Hardware pin RESETB should be asserted LOW at least for 10ms to reset

IP175G/GH, and gets initial values from pins, registers and EEPROM after reset.

IP175G

AFT

PVDD

RJ45 Cable loopback

Pin1

Pin3

Pin2

Pin6

IP175G bảng dữ liệu(PDF) 18 Page - List of Unclassifed Manufacturers