MT92210 Zarlink Semiconductor, MT92210 Datasheet - Page 128

• Manufacturer Part Number: MT92210
• Description: 1023 Channel Voice Over ip (VoIP) Processor
• Manufacturer: Zarlink Semiconductor

128
Two lookup tables are used to determine padding bytes during a silence period based on the received CN packet.
The following CN Lookup Table is located at fixed address in SSRAM B:
PCM-R
PCM-R
0
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 72 - Format of RX xxPCM TSSTs - 2 of 2
b7
1
0
0
0
0
b7
0
0
0
0
0
(ADPCM Samples in high bits)
CN/SID Payload Byte N-2 [7:0]
CN/SID Payload Byte N-1 [7:0]
(ADPCM Samples in low bits)
CN/SID Payload Byte N-2 [7:0]
CN/SID Payload Byte N-1 [7:0]
CN/SID Payload Length [7:0]
CN/SID Payload Length [7:0]
CN/SID Payload Byte 0 [7:0]
CN/SID Payload Byte 1 [7:0]
CN/SID Payload Byte 0 [7:0]
CN/SID Payload Byte 1 [7:0]
b6
0
0
0
0
0
b6
0
0
0
0
0
Spectral CN Packet
Spectral CN/SID Packet
Spectral CN/SID Packet
CN
CN
CN
CN
Spectral CN Packet
CN
CN
CN
CN
CN
CN
b5
0
0
0
0
0
b5
0
0
0
0
0
CRC16 [15:8]
CRC16 [15:8]
CRC16 [7:0]
CRC16 [7:0]
Zarlink Semiconductor Inc.
b4
0
0
0
0
0
b4
0
0
0
0
0
b3
0
0
0
0
0
b3
0
0
0
0
0
b2
0
0
0
0
0
b2
0
0
0
0
0
b1
0
0
0
0
0
b1
0
0
0
0
0
b0
0
0
0
0
0
b0
1
0
0
0
0
Fields covered by CRC16
(PCM-R not included in CRC16)
Explicit Underrun Indication
(present until another
CN/voice packet is received)