m21120 Mindspeed Technologies, m21120 Datasheet - Page 18

• Manufacturer Part Number: m21120
• Description: M21120 Crosspoint Switch Data Sheet
• Manufacturer: Mindspeed Technologies

21120-DSH-001-B, 3/27/03
Initialization Sequence
The M21120 requires a hardware reset after the initial power up. Following either a software or a hardware reset, the following
sequence should be executed in order to correctly initialize the M21120 for operation.
Table 13. Bit Function for Individual Channel Enable Registers
Register Address
1. Set bit 2 of register EB to "1"
2. Write data = 44h to registers 22h-43h
(hex)
8A
8B
8C
8D
8E
80
81
82
83
84
85
86
87
88
89
8F
90
91
92
93
94
95
96
97
98
Input Channel
Controlled
10
11
—
—
—
—
—
—
—
—
—
—
—
—
—
0
1
2
3
4
5
6
7
8
9
34 x 34 3.2 Gbps Crosspoint Switch with Input Equalization
Output Channel
Controlled
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
0
1
2
3
4
5
6
7
8
9
Mindspeed Technologies™
Bit 3: Bypass
input IE
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
byp_eq
(1)
0
0
0
0
0
0
0
0
0
0
0
0
0
(Sheet 1 of 2)
Bit 1: Enable/
Disable Input
en_in
en_in
en_in
en_in
en_in
en_in
en_in
en_in
en_in
en_in
en_in
en_in
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit 0: Enable/Dis-
able Output
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
en_out
M21120
Page 18 of 38