CD2231

Manufacturer Part NumberCD2231
DescriptionCD2231 Intelligent Two-channel Lan And Wan Communications Controller
ManufacturerIntel Corporation
CD2231 datasheet
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
Page 141
142
Page 142
143
Page 143
144
Page 144
145
Page 145
146
Page 146
147
Page 147
148
Page 148
149
Page 149
150
Page 150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
Page 143/178

Download datasheet (3Mb)Embed
PrevNext
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
8.6.4.5
A Buffer Receive Byte Count (ARBCNT)
Register Name: ARBCNT
Register Description: Receive Buffer ‘A’ Byte Count
Default Value: x’0000
Access: Word Read/Write
Bit 15
Bit 14
Bit 13
Bit 7
Bit 6
Bit 5
8.6.4.6
B Buffer Receive Byte Count (BRBCNT)
Register Name: BRBCNT
Register Description: Receive Buffer ‘B’ Byte Count
Default Value: x’0000
Access: Word Read/Write
Bit 15
Bit 14
Bit 13
Bit 7
Bit 6
Bit 5
These registers contain the number of bytes stored in the external data buffers by the CD2231. The
count is updated after a block of data is moved to memory and the buffer is terminated. As initially
written by the host, the register contains the number of bytes the buffer can hold.
8.6.4.7
A Receive Buffer Status (ARBSTS)
Register Name: ARBSTS
Register Description: Receive Buffer ‘A’ Status
Default Value: x’00
Access: Byte Read/Write
Bit 7
Bit 6
Bit 5
Berr
EOF
EOB
Datasheet
Bit 12
Bit 11
Binary Count Value, 16-bit count, bits 15:8
Bit 4
Bit 3
Binary Count Value, 16-bit count, bits 7:0
Bit 12
Bit 11
Binary Count Value, 16-bit Count, bits 15:8
Bit 4
Bit 3
Binary Count Value, 16-bit count, bits 7:0
Bit 4
Bit 3
0
0
Intel Hex Address: x’48
Motorola Hex Address: x’4A
Bit 10
Bit 9
Bit 8
Bit 2
Bit 1
Bit 0
Intel Hex Address: x’4A
Motorola Hex Address: x’48
Bit 10
Bit 9
Bit 8
Bit 2
Bit 1
Bit 0
Intel Hex Address: x’4C
Motorola Hex Address: x’4F
Bit 2
Bit 1
Bit 0
0
0
2231own
143