Broadcom 440X User Manual page 20

Control Registers. This test verifies the read and write capabilities of the network adapter
registers by writing various values to the registers and verifying the results. The device driver
uses these registers to perform network functions such as sending and receiving information. A
test failure indicates that the device may not be working properly.
MII Registers. This test verifies the read and write capabilities of the registers of the physical
layer (PHY). The physical layer is used to control the electrical signals on the wire and for
configuring network speeds such as 1000 Mbit/s.
EEPROM. This test verifies the content of the electrically erasable programmable read-only
memory (EEPROM) by reading a portion of the EEPROM and computing the checksum. The test
fails if the computed checksum is different from the checksum stored in the EEPROM. An
EEPROM image upgrade does not require a code change for this test.
Internal Memory. This test verifies that the internal memory of the device is functioning
properly. The test writes patterned values to the memory and reads back the results. The test
fails if an erroneous value is read back. The device cannot function if its internal memory is not
functioning properly.
On-Chip CPU. This test verifies the operation of the internal CPUs in the device (not supported
for the Broadcom 440X 10/100 Integrated Controller network adapter).
Interrupt. This test verifies that the Network Device Driver Interface Specification (NDIS)
driver is able to receive interrupts from the device.
Loopback MAC and Loopback PHY. These tests verify that the NDIS driver is able to send
packets to and receive packets from the device.
Test LED. This test causes all of the LEDs to blink 5 times for the purpose of identifying the
device.
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