CS8900A
Crystal LAN™ ISA Ethernet Controller
4.3.11 EEPROM Command
(Read/Write, Address: PacketPage base + 0040h)
7
6
5
4
3
2
1
0
ADD7 to ADD0
F
E
D
C
B
A
9
8
Reserved
ELSEL
OB1
OB0
This register is used to control the reading, writing and erasing of the EEPROM. See Section 3.5.
ADD7-ADD0
OB1,OB0
ELSEL
Address of the EEPROM word being accessed.
Indicates the Opcode of the command being executed. See Table 7.
External logic select: When clear, the EECS pin is used to select the EEPROM. When set, the
ELCS pin is used to select the external LA decode circuit.
Reserved
Reserved and must be written as 0.
Reset value is: XXXX XXXX XXXX XXXX
4.3.12 EEPROM Data
(Read/Write, Address: PacketPage base + 0042h)
Address 0043h
Address 0042h
Most significant byte of the EEPROM data.
Least significant byte of the EEPROM data.
This register contains the word being written to, or read from, the EEPROM. See Section 3.5 on page 24.
Reset value is: XXXX XXXX XXXX XXXX
4.3.13 Receive Frame Byte Counter
(Read only, Address: PacketPage base + 0050h)
Address 0051h
Address 0050h
Most significant byte of the byte count.
Least significant byte of the byte count.
This register contains the count of the total number bytes received in the the current received frame. This count con-
tinuously increments as more bytes in this frame are received. See Section 5.2.9 on page 87.
Reset value is: XXXX XXXX XXXX XXXX
CIRRUS LOGIC PRODUCT DATA SHEET
46
DS271PP3
CIRRUS [ CIRRUS LOGIC ]
