MT92220BG Zarlink Semiconductor, MT92220BG Datasheet - Page 139

• Manufacturer Part Number: MT92220BG
• Description: Description = 1023 Channel Voice Over IP/AAL2 Processor ;; Package Type = Epbga ;; No. Of Pins = 608
• Manufacturer: Zarlink Semiconductor

Data Sheet
Header type
CRC
1’s Cnt
History & Valid:
Field
256
512 Byte Buffer
512 Byte Buffer
512
1K Byte Buffer
1K Byte Buffer
1K Byte Buffer
1K Byte Buffer
1K Byte Buffer
1K Byte Buffer
1K Byte Buffer
"000"=Plain;
"001"=One byte address;
"010"=Two byte address;
"011"=One byte address + Control;
"100"=Two byte address + Control;
others = reserved.
CRC Present. When ‘1’, a CRC16 is expected at the end of each HDLC Packet that is
received.
Counter of the number of consecutive ‘1’ that have been received recently on the HDLC
stream. This field should be initialized to “111” by software upon initialization of stream.
This field contains partially received bytes from the HDLC stream. The number of bits
received but pending byte completion can be established by locating the first ‘1’ starting
from the most significant bit of the field. This field should be initialized to “00000001” by
software upon initialization of stream.
Figure 75 - TX Circular Buffer Base/Size Indication
Table 57 - Fields and Description (continued)
b12
b12
b12
b12
b12
b12
b12
b12
b12
b11
b11
b11
b11
b11
b11
b11
b11
b11
b10
b10
b10
b10
b10
b10
b10
b10
b10
TX Circular Buffer Base [20:10]
TX Circular Buffer Base [20:10]
TX Circular Buffer Base [20:10]
TX Circular Buffer Base [20:10]
TX Circular Buffer Base [20:10]
TX Circular Buffer Base [20:11]
TX Circular Buffer Base [20:11]
Zarlink Semiconductor Inc.
TX Circular Buffer Base [20:9]
TX Circular Buffer Base [20:9]
b9
b9
b9
b9
b9
b9
b9
b9
b9
b8
b8
b8
b8
b8
b8
b8
b8
b8
b7
b7
b7
b7
b7
b7
b7
b7
b7
Description
b6
b6
b6
b6
b6
b6
b6
b6
b6
b5
b5
b5
b5
b5
b5
b5
b5
b5
b4
b4
b4
b4
b4
b4
b4
b4
b4
b3
b3
b3
b3
b3
b3
b3
b3
b3
b2
b2
b2
b2
b2
b2
b2
b2
b2
1
1
b1
b1
b1
b1
b1
b1
b1
b1
b1
0
0
1
1
1
1
1
b0
b0
b0
b0
b0
b0
b0
b0
b0
1
1
0
0
0
0
0
0
0
MT92220
139
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