Datasheet

MPC8260A PowerQUICC™ II Integrated Communications Processor Hardware Specifications, Rev. 2.0
4 Freescale Semiconductor
Features
— 32-bit address decodes with programmable bank size
— Three user programmable machines, general-purpose chip-select machine, and page-mode
pipeline SDRAM machine
— Byte selects for 64 bus width (60x) and byte selects for 32 bus width (local)
— 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 (only FCC1 and
FCC2 on the MPC8255):
– 10/100-Mbit Ethernet/IEEE Std. 802.3® CDMA/CS interface through media independent
interface (MII)
– ATM—Full-duplex SAR protocols at 155 Mbps, through UTOPIA interface, AAL5, AAL1,
AAL0 protocols, TM 4.0 CBR, VBR, UBR, ABR traffic types, up to 16 K external
connections
– Transparent
– HDLC—Up to T3 rates (clear channel)
— Two multichannel controllers (MCCs) (only MCC2 on the MPC8255)
– Each MCC handles 128 serial, full-duplex, 64-Kbps data channels.Each 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