SMSC LAN9312 EECS, EEDO, EEDI, EECLK, 10.2.3.2ERASE (Erase Location)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Table 10.5 Microwire Command Set for 9 Address Bits (continued)

START

DATA TO

DATA FROM

# OF

INST

BIT

OPCODE

ADDRESS

EEPROM

EEPROM

CLOCKS

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

START

DATA TO

DATA FROM

# OF

INST

BIT

OPCODE

ADDRESS

EEPROM

EEPROM

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

10.2.3.2ERASE (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.

EECS

EECLK

EEDO 1 1 1 Ax A0

EEDI

Figure 10.7 EEPROM ERASE Cycle

SMSC LAN9312	145	Revision 1.4 (08-19-08)
	DATASHEET