參數(shù)資料
型號: LAN9116
廠商: SMSC Corporation
英文描述: Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller
中文描述: 高效的單芯片10/100非PCI以太網(wǎng)控制器
文件頁數(shù): 90/126頁
文件大?。?/td> 831K
代理商: LAN9116
Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
Revision 1.1 (05-17-05)
90
SMSC LAN9116
DATASHEET
30-28
EPC command.
This field is used to issue commands to the EEPROM
controller. The EPC will execute commands when the EPC Busy bit is set.
A new command must not be issued until the previous command completes.
This field is encoded as follows:
READ (Read Location):
This command will cause a read of the EEPROM
location pointed to by EPC Address. The result of the read is available in
the E2P_DATA register.
EWDS (Erase/Write Disable):
After issued, the EEPROM will ignore erase
and write commands. To re-enable erase/write operations issue the EWEN
command.
EWEN (Erase/Write Enable):
Enables the EEPROM for erase and write
operations. The EEPROM will allow erase and write operations until the
Erase/Write Disable command is sent, or until power is cycled.
Note:
The EEPROM device will power-up in the erase/write-disabled
state. Any erase or write operations will fail until an Erase/Write
Enable command is issued.
WRITE (Write Location):
If erase/write operations are enabled in the
EEPROM, this command will cause the contents of the E2P_DATA register
to be written to the EEPROM location selected by the EPC Address field.
WRAL (Write All):
If erase/write operations are enabled in the EEPROM,
this command will cause the contents of the E2P_DATA register to be
written to every EEPROM memory location.
ERASE (Erase Location):
If erase/write operations are enabled in the
EEPROM, this command will erase the location selected by the EPC
Address field.
ERAL (Erase All):
If erase/write operations are enabled in the EEPROM,
this command will initiate a bulk erase of the entire EEPROM.
RELOAD (MAC Address Reload):
Instructs the EEPROM controller to
reload the MAC address from the EEPROM. If a value of 0xA5 is not found
in the first address of the EEPROM, the EEPROM is assumed to be un-
programmed and MAC Address Reload operation will fail. The “MAC
Address Loaded” bit indicates a successful load of the MAC address.
R/W
0
27-10
Reserved.
RO
-
BITS
DESCRIPTION
TYPE
DEFAULT
[30]
[29]
[28]
OPERATION
0
0
0
READ
0
0
1
EWDS
0
1
0
EWEN
0
1
1
WRITE
1
0
0
WRAL
1
0
1
ERASE
1
1
0
ERAL
1
1
1
Reload
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