mt90502ag2 Zarlink Semiconductor, mt90502ag2 Datasheet - Page 99

• Manufacturer Part Number: mt90502ag2
• Description: Multi-channel Aal2 Sar
• Manufacturer: Zarlink Semiconductor

+1A
+1C
+1E
CPS-Packet Final Assembly structures are located in TX SSRAM at
addresses +1000h to +1FE0h, +2000h to +3FE0h, +4000h to +7FE0h and
+8000h to +FFE0h for 128, 256, 512 and 1023 channels repsectively.
Each structure is 32-bytes in size.
Fields in Italic are used by Hardware only.
Fields in Plain are written to by the CPU/Software.
+10
+12
+14
+16
+18
+A
+C
+E
+0
+2
+4
+6
+8
CPSP0 Base [7:3]
CPSP2 Base [7:3]
CPS-Packet Final Assembly Structure (Simple Silence Suppression)
b15
MP0 Base Add[7:3] MP0 Code
MP2 Base Add[7:3] MP2 Code
S. to V. Timer
b14
b13
SS Timer[8:0]
VC Number[9:0]
b12
Figure 62 - CPS-Packet Final Assembly Structure (Simple Silence Suppression)
CID
b11
CPS-Packet Byte Count[31:16]
CPSP2 Code
CPSP0 Code
CPS-Packet Byte Count[15:0]
# EDU
b10
CPS-Packet Count[31:16]
CPS-Packet Count[15:0]
Voice to SilenceTimer
SID Count[31:16]
b9
SID Count[15:0]
b8
CPSP3 Base [7:3]
CPSP1 Base [7:3]
b7
MP1 Base Add[7:3] MP1 Code
MP3 Base Add[7:3] MP3 Code
SS
b6
SUI
b5
Seq I
b4
Pac Del Cnt [3:0]
b3
Send UUI[3:0]
CPSP1 Code
CPSP3 Code
b2
TX Delay
b1
Zarlink Semiconductor Inc.
b0
MT90502
Silence to Voice Timer : Time in CPS-Packets to change from silence to voice. 0
means all voice packets will be sent.
Voice to Silence Timer : Time in CPS-Packets to change from voice to silence. 0
means all silent packets will not be sent.
TX Delay : Delay in CPS-Packets that will be added by the Silence Suppression
Algorithm to prevent loss of voice. Range is 0 to 4 CPS-packets.
SS Timer: Silence State Timer. Increments when the suppression indication from
the TDM bus is active during a whole CPS-Packet and the SS state is cleared,
until Voice to Silence Timer is reached. Also increments when the suppression
indication from the TDM bus is inactive for any byte in a whole CPS-Packet and
the SS state is set, until Silence to Voice Timer is reached. Whenever neither of
the previous conditions is met, this timer will reset to 0. When the state counter
reaches the Silent to Voice Timer or Voice to Silent Timer, the SS bit will toggle
thus the supression state will change.
SS: Current Silence Suppression State. ‘0’ = send voice; ‘1’ = suppress.
CPS-Packet 0-3 Base Add : base address of the start of the 4 previous CPS-
packets in the TX Circular Buffer. 0 is most recent; 3 is
oldest CPS-packet. Initialized to 00h at start-up by software.
SID Count : Count of the number of SID CPS-Packets sent out. SID packets in this
mode are only sent upon the transition from Voice to Silence.
CPS-Packet Byte Count : Byte counter of all payload bytes sent (payload is
defined as the LI+1 in each CPS-Packet sent). SID packets that are sent will count
as one byte. SID packets that are not sent will be counted as 1 byte.
CPS-Packet Count : CPS-Packet counter of all packets. All SID packets (might
they have been sent or not) are counted in this field.
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Data Sheet