lan9311 Standard Microsystems Corp., lan9311 Datasheet - Page 145
lan9311
Manufacturer Part Number
lan9311
Description
Lan9311/lan9311i Two Port 10/100 Managed Ethernet Switch With 16-bit Non-pci Cpu Interface
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9311.pdf
(460 pages)
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Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
10.2.3
10.2.3.1
eeprom_size_strap[1:0]
ERASE
ERASE
WRITE
EWDS
EWEN
WRAL
READ
ERAL
ERAL
INST
INST
00
01
10
11
START
START
Microwire EEPROM
Based on the configuration strap eeprom_type_strap, various sized Microwire EEPROMs are
supported. The varying size ranges are supported by additional bits in the address field
(EPC_ADDRESS) of the
largest EEPROM uses all the address bits, while the smaller EEPROMs treat the upper address bits
as don’t cares. The EEPROM controller drives all the address bits as requested regardless of the
actual size of the EEPROM. The supported size ranges for Microwire operation are shown in
Table
Refer to
Microwire Master Commands
Table
cycles required, for 7, 9, and 11 address bits respectively. These commands are detailed in the
following sections as well as in
page
BIT
BIT
1
1
1
1
1
1
1
1
1
198.
10.3.
10.4,
Section 15.5.10, "Microwire Timing," on page 455
OPCODE
OPCODE
Table
00
00
00
10
01
00
00
11
11
Table 10.4 Microwire Command Set for 7 Address Bits
Table 10.5 Microwire Command Set for 9 Address Bits
# OF ADDRESS BITS
10.5, and
Table 10.3 Microwire EEPROM Size Ranges
A8 A7 A6 A5 A4 A3 A2 A1 A0
1 0 X X X X X X X
EEPROM Command Register
11
7
9
Table 10.6
A6 A5 A4 A3 A2 A1 A0
A6 A5 A4 A3 A2 A1 A0
A6 A5 A4 A3 A2 A1 A0
1 0 X X X X X
0 0 X X X X X
1 1 X X X X X
0 1 X X X X X
Section 14.2.4.1, "EEPROM Command Register (E2P_CMD)," on
ADDRESS
ADDRESS
DATASHEET
detail the Microwire command set, including the number of clock
145
1024 x 8 and 2048 x 8
256 x 8 and 512 x 8
EEPROM SIZE
RESERVED
128 x 8
(E2P_CMD). Within each size range, the
for detailed Microwire timing information.
DATA TO
DATA TO
EEPROM
EEPROM
D7 - D0
D7 - D0
-
-
-
-
-
-
-
DATA FROM
DATA FROM
(RDY/~BSY)
(RDY/~BSY)
(RDY/~BSY)
(RDY/~BSY)
(RDY/~BSY)
(RDY/~BSY)
EEPROM
EEPROM
93xx56A, 93xx66A
93xx76A, 93xx86A
D7 - D0
EEPROM TYPES
Hi-Z
Hi-Z
Revision 1.2 (04-08-08)
93xx46A
CLOCKS
CLOCKS
# OF
# OF
10
10
10
10
18
18
18
12
12
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