RC82562EP Intel, RC82562EP Datasheet - Page 56
RC82562EP
Manufacturer Part Number
RC82562EP
Description
IC ETH 10/100 PLC DEV CTRL 64BGA
Manufacturer
Intel
Specifications of RC82562EP
Rohs Status
RoHS non-compliant
Controller Type
Ethernet Controller
Interface
IEEE 802.3
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
64-BGA
Current - Supply
-
Operating Temperature
-
Other names
832361
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Host Software Interface
6.3.4.4
48
Figure 13. EEPROM Read Timing Diagram
Intel 8255x 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
EEDO
Software Write Access to the EEPROM
Write access to the EEPROM is similar to the read access outlined above, with the differences of a
write opcode and step 4:
EESK
EECS
EEDI
1. Activate the EEPROM by writing a 1 to the EECS bit.
2. Write the read opcode, including the start bit (110b), one bit at a time, starting with the most
3. Write the address field, one bit at a time, starting with the most significant bit.
4. Write a 16-bit word to the EEPROM, one bit at a time, starting with the most significant bit
5. De-activate the EEPROM by writing a 0 to the EECS bit.
significant bit (1):
(write a data bit to the EEDI bit):
a. Write the opcode bit to the EEDI bit.
b. Write a 1 to EESK bit then wait the minimum SK high time.
c. Write a 0 to EESK bit then wait the minimum SK low time.
d. Repeat steps 2.a through 2.c for the next two opcode bits.
a. Write the address bit to the EEDI bit.
b. Write a 1 to EESK bit then wait the minimum SK high time.
c. Write a 0 to EESK bit then wait the minimum SK low time.
d. Read the EEDO bit (looking for the dummy 0 bit).
e. Repeat steps 3.a through 3.d until the EEDO bit equals 0, indicating that the address field
a. Write a 1 to the EESK bit then wait the minimum SK high time.
b. Write a 0 to the EESK bit then wait the minimum SK low time.
c. Repeat steps 4.a through 4.c an additional 15 times.
has been completely written.
READ OP code
A
5
A
4
A
3
A
2
A
A
A
1
1
0
A
0
D
15
D
0
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