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Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 146 SMSC LAN9311/LAN9311i
DATASHEET
10.2.3.2 ERASE (Erase Location)
If erase/write operations are enabled in the EEPROM, this command will erase the location selected
by the EPC_ADDRESS field of the EEPROM Command Register (E2P_CMD). The EPC_TIMEOUT
bit is set if the EEPROM does not respond within 30mS.
EWDS 1 00 0 0 X X X X X X X - Hi-Z 12
EWEN 1 00 1 1 X X X X X X X - Hi-Z 12
READ 1 10 A8 A7 A6 A5 A4 A3 A2 A1 A0 - D7 - D0 20
WRITE 1 01 A8 A7 A6 A5 A4 A3 A2 A1 A0 D7 - D0 (RDY/~BSY) 20
WRAL 1 00 0 1 X X X X X X X D7 - D0 (RDY/~BSY) 20
Table 10.6 Microwire Command Set for 11 Address Bits
INST
START
BIT OPCODE ADDRESS
DATA TO
EEPROM
DATA FROM
EEPROM
# OF
CLOCKS
ERASE 1 11
A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
- (RDY/~BSY) 14
ERAL 1 00
1 0 X X X X X X X X X
- (RDY/~BSY) 14
EWDS 1 00
0 0 X X X X X X X X X
-Hi-Z14
EWEN 1 00
1 1 X X X X X X X X X
-Hi-Z14
READ 1 10
A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
-D7 - D022
WRITE 1 01
A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
D7 - D0 (RDY/~BSY) 22
WRAL 1 00
0 1 X X X X X X X X X
D7 - D0 (RDY/~BSY) 22
Figure 10.7 EEPROM ERASE Cycle
Table 10.5 Microwire Command Set for 9 Address Bits (continued)
INST
START
BIT OPCODE ADDRESS
DATA TO
EEPROM
DATA FROM
EEPROM
# OF
CLOCKS
1
EECLK
EEDI
EEDO
EECS
11Ax A0