MT90500 Mitel Semiconductor, MT90500 Datasheet - Page 37

• Manufacturer Part Number: MT90500
• Description: Multi-Channel ATM AAL1 SAR
• Manufacturer: Mitel Semiconductor

6042h
15
EMIM
Internal Memory
EIMCSBASE
Figure 7 - External Memory to Internal Memory Control Structure
<20:9>
12
Structure of the Receive Circular Buffer Address and Size Fields
B “0_0000_0000”
4
9
EIMCSL
15
15
15
15
15
<8:0>
0
Rx Circular Buffer Address (15 bits)
Rx Circular Buffer Address (13 bits)
Rx Circular Buffer Address (12 bits)
Rx Circular Buffer Address (11 bits)
Rx Circular Buffer Address (14 bits)
Minimum of 128
address bits<20:10>
Maximum of 2048
address bits<20:6>
address bits<20:8>
address bits<20:9>
address bits<20:7>
Pointer to Start of
External to Internal Memory
Control Structure
entries
<20:0>
entries
21
+1FFC
+1FFE
+000
+002
+004
+006
+008 V D U
+00A
15
V D U
V D U
V D U
External Memory
10000
11
R
R
R
Rx Circ. Buff. Address & Size
R
Rx Circ. Buff. Address & Size
Rx Circ. Buff. Address & Size
Rx Circ. Buff. Address & Size
1000
100
10
10
1
0
0
0
0
0
TDM Channel #
TDM Channel #
TDM Channel #
TDM Channel #
1024 bytes
256 bytes
512 bytes
128 bytes
64 bytes
MT90500
0
37