cx28224 Mindspeed Technologies, cx28224 Datasheet - Page 15

• Manufacturer Part Number: cx28224
• Description: Cx28224/5/9 Inverse Multiplexing For The Atm Ima Family
• Manufacturer: Mindspeed Technologies

Figure 1-1. Block DIagram
28229-DSH-001-D
CX2822x
1
Internal
256Kx8
SRAM
Introduction to IMA
This chapter provides a basic introduction to IMA. It will introduce common
terminology, the IMA frame format and IMA Cell structure. It will also address one
of the challenges of IMA: differential delay between links. For detailed coverage of
these topics the reader should refer to the ATM forum's standard for IMA.
The CX2822x is composed of the following major functional blocks as shown in
Figure
IMA clocks
0
memory interface
Differential Delay
extmemsel pin
External Memory Interface
Engine
Rx Block
Tx Block
IMA
1-1.
1
Mindspeed Technologies
JTAG
IMA Block
Micro interface
Counters
TC
™
OneSec
TC Block
TC Status
Registers
cell processor
cell processor
cell processor
cell processor
cell processor
cell processor
cell processor
cell processor
Clocks
Micro
TC Control
Line interface 0
Line interface 1
Line interface 2
Line interface 3
Line interface 4
Line interface 5
Line interface 6
Line interface 7
Registers
500027_071
1
-
1