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28529-DSH-001-K

产品描述Inverse Multiplexing for ATM (IMA) Family
文件大小2MB,共309页
制造商MACOM
官网地址http://www.macom.com
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28529-DSH-001-K概述

Inverse Multiplexing for ATM (IMA) Family

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M28525/9 Data Sheet
Inverse Multiplexing for ATM (IMA) Family
The M2852x family of devices provides system designers with a complete integrated IMA solution for up to 32 ports.
All devices include a Transmission Convergence block to perform cell delineation, 512 K internal RAM to meet ATM
forum requirements for differential delay compensation and a dual mode (UTOPIA or Serial) PHY layer interface.
Source code for all required software functions is available from Mindspeed. The M28529 supports 32 IMA groups
with 1-32 links per group.
The TC block is capable of bit level cell delineation, which allows for direct connection DSL serial data streams
without a frame sync pulse. Individual ports can be operated in a 'pass thru' mode without the IMA overhead.
The M28529 provides direct connection to 32 serial/interleaved highway links or a PHY side UTOPIA bus. In
addition, an external memory bus allows the differential delay memory to access up to 2 Mbytes of external
RAM.The M28529 supports both version 1.0 and 1.1 of IMA standard AF-PHY-0086.001
Distinguishing Features
• Complete IMA solution in a single package
• 16 port, M28525
• 32 port, M28529
• Field tested software available
• Up to 32 IMA groups with 1-32 links/group
• Supports 50 ms (beyond the IMA standard requirements for 25 ms)
differential delay with 512K Internal memory
• Memory expandable to 2 M bytes via external bus
• UTOPIA level 2 interfaces
• Glueless serial and interleaved highway interfaces to Mindspeed
Framers
• Octet or Bit level cell delineation
• Variable link data rates (64K–8.192 Mb/s)
Functional Block Diagram
M 28529
E x t e rn a l M e m o r y
I n t e rf a c e
T C B lo c k
IMA Bypass Enabled
C e ll
proc es s or
C e ll
proc es s or
TC BLOCK UTOPIA INTERFACE
L in e in t e r f a c e
0
L in e in t e r f a c e
1
I n t e rn a l
512Kx8
SR AM
IM A
B lo c k
0
e x tm e m s e l p in
1
IMA and TC Enabled
Serial/Interleaved mode enabled
IMA Bypass Enabled
RX FIFO
i
D if f e r e n t ia l D e la y
m e m o r y in t e r f a c e
R x B lo c k a n d
P as s t hrough
UTOPIA 2 Interface
Registers
low
T x B lo c k a n d
P as s t hrough
TX FIFO
IM A
E n g in e
Interface
TX FIFO
C e ll
proc es s or
C e ll
proc es s or
L in e in t e r f a c e 3 0
L in e in t e r f a c e 3 1
Registers
Control
Status
Clock
O n e Se c
IM A c l o c ks
IMA_SysClk
IMA_RefClk
JTAG
M ic r o
I n te rf a c e
Micro Clk
M ic r o
C l o c ks
OneSecIO
TxTRL[1]
TxTRL[0]
* N o t e : T h e M 2 8 5 2 5 o n ly s u p p o r t s 1 6 T C P o r t s
28529-DSH-001-K
Mindspeed Technologies
®
Mindspeed Proprietary and Confidential
8KHzIn
Utopia mode enabled
TC
C o u n te r s
T C S ta tu s
R e g i s te r s
T C C o n tr o l
R e g i s te r s
September 2007
PHY Side Interface Pins
PHY Layer
Phy IntFc Sel Pin
ATM Layer UTOPIA Interface Pins
...
IMA and TC Enabled
RX FIFO
UTOPIA 2 interface
high
ATM layer

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描述 Inverse Multiplexing for ATM (IMA) Family Inverse Multiplexing for ATM (IMA) Family

 
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