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参数资料
| 型号： | MPC850ZT33 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | RISC PROCESSOR, PBGA256 |
| 封装： | PLASTIC, BGA-256 |
| 文件页数： | 8/12页 |
| 文件大小： | 70K |
| 代理商： | MPC850ZT33 |
MOTOROLA
MPC850/MPC850SE Technical Summary
5
QUICC multichannel controller (QMC) microcode features
— Up to 64 independent communication channels on a single SCC
— Arbitrary mapping of 0–31 channels to any of 0–31 TDM time slots
— Supports either transparent or HDLC protocols for each channel
— Independent Tx/Rx buffer descriptors and event/interrupt reporting for each channel
ATM support
— Compliant with ATM forum UNI 4.0 specification
— Cell processing up to 50–70 Mbps at 50-MHz system clock
— Cell multiplexing/demultiplexing
— Support of AAL5 and AAL0 protocols on a per-VC basis
– (AAL0 support enables OAM and software implementation of other protocols)
— ATM pace control (APC) scheduler, providing:
– Direct support of constant bit rate (CBR)
– Direct support of unspecified bit rate (UBR)
– Control mechanisms enabling software support of available bit rate (ABR)
— Support for two types of physical interfaces
– UTOPIA
– Byte-aligned serial (e.g. T1/E1/ADSL)
— UTOPIA-mode ATM supports:
– UTOPIA level 1 master with cell-level handshake
– Multi-PHY (up to 4 physical layer devices)
– Connection to 25 Mbps, 51 Mbps, or 155 Mbps framers
– UTOPIA clock rates of 1:2 or 1:3 system clock rates
— Serial-mode ATM connection supports:
– Transmission convergence (TC) function for T1/E1/ADSL lines
– Cell delineation
– Cell payload scrambling/descrambling
– Automatic idle/unassigned cell insertion/stripping
– Header error control (HEC) generation, checking, and statistics
– Glueless interface to Motorola CopperGold ADSL transceiver
— Receive VP/VC connection lookup mechanisms, including:
– Internal sequential lookup table supporting up to 32 connections
– Support for up to 64K connections using external memory via address compression or
content-addressable memory (CAM)
— Independent transmit/receive buffer descriptor ring data structures for each connection
— Interrupt report per channel using exception queue
— Supports 53-byte or up to 64-byte (expanded) ATM cells
— AAL5 segmentation and reassembly (SAR) features for segmentation
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