VSC8601XKN Vitesse Semiconductor Corp, VSC8601XKN Datasheet - Page 68

IC PHY 10/100/1000 64-EP-LQFP

VSC8601XKN

Manufacturer Part Number
VSC8601XKN
Description
IC PHY 10/100/1000 64-EP-LQFP
Manufacturer
Vitesse Semiconductor Corp
Type
PHY Transceiverr
Datasheets

Specifications of VSC8601XKN

Number Of Drivers/receivers
1/1
Protocol
Gigabit Ethernet
Voltage - Supply
2.5V, 3.3V
Mounting Type
Surface Mount
Package / Case
64-LQFP Exposed Pad, 64-eLQFP, 64-HLQFP
Case
TQFP
Dc
06+
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
907-1028

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Figure 17.
Revision 4.1
September 2009
21E.10:0 = Write Address
22E.7:0 = Data to Write
21E.13 = 1
21E.12 = 0
required to be able to write to the EEPROM, refer to the EEPROM’s specific datasheet to
ensure that write protection on the EEPROM is not set.
The following illustration shows the interaction of the VSC8601 device and the EEPROM.
EEPROM Read and Write Register Flow
To read a value from a specific address of the EEPROM:
1. Read the VSC8601 device register bit 21E.11 and ensure that it is set.
2. Write the EEPROM address to be read to register bits 21E.10:0.
3. Set both register bits 21E.12 and 21E.13 both to 1.
4. When register bit 21E.11 changes to 1, read the 8-bit data value found at register
To write a value to a specific address of the EEPROM:
1. Read the VSC8601 device register bit 21E.11 and ensure that it is set.
2. Write the address to be written to register bits 21E.10:0.
3. Set register bit 21E.12 to 0.
4. Set register bits 22E.7:0 with the 8-bit value to be written to the EEPROM.
5. Set register bit 21E.13 to 1.
6. To avoid collisions during read and write transactions, always wait until register bit
bits 22E.15:8. This is the contents of the address just read by the PHY.
21E.11 changes to 1 before performing another EEPROM read or write operation.
Write EEPROM
Data
21E.10:0 = Address to Read
Wait for Ready
Read or Write
21E.12 = 1
START
Read EEPROM
21E.11 = 1
Data
21E.11 = 0
Read Data = 22E.15:8
Wait for Ready
21E.13 = 1
21E.11 = 1
VSC8601 Datasheet
21E.11 = 0
Configuration
Page 68

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