MPC8250 datasheet(4/60 Pages) FREESCALE

4 / 60 page

MPC8250 Hardware Specifications, Rev. 1

Freescale Semiconductor

Features

— Dedicated interface logic for SDRAM

•

CPU core can be disabled and the device can be used in slave mode to an external core

•

Communications processor module (CPM)

— Embedded 32-bit communications processor (CP) uses a RISC architecture for flexible support

for communications protocols

— Interfaces to G2 core through on-chip 32-Kbyte dual-port RAM and DMA controller

— Serial DMA channels for receive and transmit on all serial channels

— Parallel I/O registers with open-drain and interrupt capability

— Virtual DMA functionality executing memory-to-memory and memory-to-I/O transfers

— Three fast communications controllers supporting the following protocols:

– 10/100-Mbit Ethernet/IEEE 802.3 CDMA/CS interface through media independent

interface (MII)

– Transparent

– HDLC—Up to T3 rates (clear channel)

— One multichannel controller (MCC2)

– Handles 128 serial, full-duplex, 64-Kbps data channels. The MCC can be split into four

subgroups of 32 channels each.

– Almost any combination of subgroups can be multiplexed to single or multiple TDM

interfaces up to four TDM interfaces per MCC

— Four serial communications controllers (SCCs) identical to those on the MPC860, supporting

the digital portions of the following protocols:

– Ethernet/IEEE 802.3 CDMA/CS

– HDLC/SDLC and HDLC bus

– Universal asynchronous receiver transmitter (UART)

– Synchronous UART

– Binary synchronous (BISYNC) communications

– Transparent

— Two serial management controllers (SMCs), identical to those of the MPC860

– Provide management for BRI devices as general circuit interface (GCI) controllers in time-

division-multiplexed (TDM) channels

– Transparent

– UART (low-speed operation)

— One serial peripheral interface identical to the MPC860 SPI

— One inter-integrated circuit (I2C) controller (identical to the MPC860 I2C controller)

– Microwire compatible

– Multiple-master, single-master, and slave modes

— Up to four TDM interfaces

– Supports one group of four TDM channels

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