ICS1889Y Просмотр технического описания (PDF) - Integrated Circuit Systems
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ICS1889Y Datasheet PDF : 35 Pages
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ICS1889
PHY Identifier Register (register 2)
BIT
Definition
15
OUI bit 3 | c
14
OUI bit 4 | d
13
OUI bit 5 | e
12
OUI bit 6 | f
11
OUI bit 7 | g
10
OUI bit 8 | h
9
OUI bit 9 | i
8
OUI bit 10 | j
7
OUI bit 11 | k
6
OUI bit 12 | l
5
OUI bit 13 | m
4
OUI bit 14 | n
3
OUI bit 15 | o
2
OUI bit 16 | p
1
OUI bit 17 | q
0
OUI bit 18 | r
When bit = 0
When bit = 1
Access
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
Default
0
1
1
0
0
0
0
0
0
0
0
1
0
1
0
1
PHY Identifier Register (register 2)
Register 2 and Register 3 contain the 24-bit Organizationally
Unique Identifier (OUI), Manufacturers Model Number and
Revision Number. Integrated Circuit Systemss OUI is used as
the default for registers 2 and 3. These values may be
overridden using the Command Override bit (16:15).
Binary Format:
0
0
0
0000 0000 0000
l s b msb l s b
(I/G)
A
0101
msb
E
0111
lsb
B
1101
msb
Organizationally Unique Identifier
bits 3-18(bits 15-0)
This field contains the lowest 16 bits of the IEEE OUI
excluding bits 0, 1, and 2. Bit 3 of the OUI maps to bit 15 of
the register.
OUI Formatting Information
The ICS OUI is shown below with information on mapping
the OUI value into registers 2 and 3.
Octet Format:
00
A0
BE
|
|
Third octet
|
Second octet
First octet
IEEE Standard 802 Lettered Format
0000 0000 0000 0101 0111 1101
abcd efgh ijkl mnop qrst uvwx
Model and Revision Information
Model
Part
1
ICS1889
2
ICS1890
The revision number will be incremented each time the silicon
is significantly revised.
These two registers can always be read and may be written by
setting the Command Override bit in the Configuration
register (16:15) and then performing a write operation. At
power-up and reset they are set to Integrated Circuit
Systemss OUI. By allowing these registers to be written, a
systems vendor may substitute their own OUI.
12
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