ACD82224 Datasheet, PDF (26/77 Pages) List of Unclassifed Manufacturers – 24 Ports 10/100 Fast Ethernet Switch

Configuration Interface
The default values of certain register bits are set by internal pull-high/pull-low 75K Ohm resistors.
These default values can be overwritten by external pull-high/pull-low with 4.7K Ohm resistors.
Table-6.11 lists all the available pins. The meanings of the register bits are described in the
chapter of “Register Description.”
Table-6.11: Configuration Interface
POS#
Pin Name
Register
Bit#
0
P20TXD0
Register-25
0
1
P20TXD1
1
2
P21TXD0
2
3
P21TXD1
3
4
P17TXD0
4
5
P17TXD1
5
6
P18TXD0
6
7
P18TXD1
7
8
P20TXEN
8
9
P21TXEN
9
10
P17TXEN
10
11
P18TXEN
11
12
LEDCLK
12
13
LEDVLD0
13
14
LEDVLD1
14
15
nLED3
15
16
nLED2
16
17
nLED1
17
18
nLED0
18
19
P15TXEN
19
20
P12TXEN,
20
21
P14TXEN
21
22
P23TXEN
22
23
P11TXEN
23
24
P03TXEN
Register-16
15
25
P23TXD0
Register-31
0
26
P23TXD1
1
27
P23TXD2
2
28
P23TXD3
3
29
P05TXEN
4
30
P06TXEN
5
31
P08TXEN
6
32
P09TXEN
7
33
P00TXD0
Register-30
0
34
P00TXD1
1
35
P02TXD0
2
36
P02TXD1
3
37
P03TXD0
4
38
P03TXD1
5
39
P05TXD0
6
40
P05TXD1
7
41
P00TXEN
42
P02TXEN
Register-20 of
1
the built-in ARL
2
Default
Table-7.25
Table-7.16
Table-7.31
Table-7.30
0
0
Note: POS41 and POS42 are belonging to Build-In ARL’S PosCfg Register (ARL Register 20).
Page 25 of 77
Confidential
Page 25