mt90520 Zarlink Semiconductor, mt90520 Datasheet - Page 70

• Manufacturer Part Number: mt90520
• Description: 8-port Primary Rate Circuit Emulation Aal1 Sar
• Manufacturer: Zarlink Semiconductor

Figure 28 - Reassembly Control Structure - SDT Format
Note 1: Fields which appear in dark grey are reserved fields which
must be cleared by software upon initialization.
Note 2: Fields which appear in light grey are those which are
updated by hardware.
Note 3: SDT Reassembly Control Structures must always start on
16-word (32-byte) boundaries.
+11A
Byte
+114
+116
+118
Add
+0E
+0A
+0C
+1A
+1C
+1E
+00
+02
+04
+06
+08
+10
+12
+14
+16
+18
+20
15
PV_SN
R
V_RTS
C
D
V
<2:0>
<3:1>
Pointer Parity Errors
CAS
CAS124
CAS125
CAS126
CAS127
14
Misinserted Cells
CAS0
CAS1
CAS2
Buffer Overflows
A S
P
AAL1 Sequence
Res
13
P
First Entry
Maximum Lead
i
Res
Errors
12
M
Zarlink Semiconductor Inc.
<3:1>
I
RTS
11
BS
Current
Minimum Structure
Size - 30 bytes (1
channel)
Maximum Structure
Size - 284 bytes (128
channels)
Frame
10
Reassembled Cells
MT90520
SDT RX_SAR Write Pointer
C
c
Reassembly Circular Buffer
Reassembly Circular Buffer
Reassembly Circular Buffer
Reassembly Circular Buffer
Reassembly Circular Buffer
Reassembly Circular Buffer
Reassembly Circular Buffer
P
9
o
Res
Last
Seq
Location in Structure
R
o
8
Structure Length
70
Base Address
Base Address
Base Address
Base Address
Base Address
Base Address
Base Address
R
7
o
AAL1 Header Errors
6
R
Pointer Reframes
o
Buffer Underruns
Good
Current Entry
Last
R
5
o
T
Lost Cells
Last Entry
Res
Number of
Channels
R
4
o
Fast State
R
o
3
VC TDM
R
o
2
Port
R
1
o
0
R
o
Word
Add
+0C
+0D
+8C
+8D
+00
+01
+02
+03
+04
+05
+06
+07
+08
+09
+0A
+0B
+0E
+0F
+10
+8A
+8B
Data Sheet