SMSC LAN9311 User Manual
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
by the EPC_ADDRESS field of the
. 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-Z
14
EWEN
1
00
1 1 X X X X X X X X X
-
Hi-Z
14
READ
1
10
A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
-
D7 - D0
22
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
1
1
Ax
A0