88e3015 Marvell Semiconductor, Inc., 88e3015 Datasheet - Page 52

• Manufacturer Part Number: 88e3015
• Description: Integrated 10/100 Fast Ethernet Transceiver
• Manufacturer: Marvell Semiconductor, Inc.

2.13 CRC Error Counter
The CRC counter, normally found in MACs, is available in the 88E3015/88E3018 device. The error counter fea-
ture is enabled through register writes and the counter is stored in an eight bit register.
2.13.1 Enabling The CRC Error Counter
2.13.1.1 Enabling Counter
Write to the following registers will enable both counters.
Register 29: 0x0009 (points to page 9 of Register 30)
Register 30: 0x0001 (enables CRC error counter)
2.13.1.2 Disabling and Clearing Counter
Write to the following register will disable and clear both counters.
Register 29: 0x0009 (points to page 9 of Register 30)
Register 30: 0x0000 (disable and clear CRC error)
2.13.1.3 Reading Counter Content
To read the CRC counter, write to the following registers.
Register 29: 0x0009 (points to page 9 of Register 30)
Register 30: bits 15:8 (CRC error count is stored in these bits)
The counter does not clear on a read command. To clear the CRC error counter, disable and enable the counters.
See Page 9 of Register 30 for details.
Doc. No. MV-S103657-00, Rev. C
Page 52
88E3015/88E3018
Integrated 10/100 Fast Ethernet Transceiver
Document Classification: Proprietary Information
CONFIDENTIAL
October 26, 2006, Advance
Copyright © 2006 Marvell