Motorola MPC8260 - Manual (Page 85)

MOTOROLA Chapter 1. Overview 1-15
Part I. Overview
The MPC8260 CPM supports a total aggregate throughput of 710 Mbps at 133 MHz. This
includes two full-duplex 100 BaseT and one full-duplex 155 Mbps for ATM. The MPC603e
core can operate at a different (higher) speed, if the application requires it.
1.7.1.6 SONET Transmission Controller
Figure 1-8 shows a SONET transmission controller conÞguration .
Figure 1-8. SONET Transmission Controller ConÞguration
In this application, the MPC8260 implements super channeling with the MCC. Nine 64-
Kbps channels are combined to form a 576-Kbps channel. The MPC8260 at 133 MHz can
support up to sixteen 576-Kbps superchannels. The MPC8260 also supports subchanneling
(under 64 Kbps) with its MCC.
1.7.2 Bus ConÞgurations
The following sections describe the following possible bus conÞgurations:
¥ Basic system
¥ High-performance communication system
¥ High-performance system core
1.7.2.1 Basic System
In the basic system conÞguration., shown in Figure 1-9, the MPC8260 core is enabled and
uses the 64-bit 60x data bus. The 32-bit local bus data is needed to store connection tables
for many active ATM connections. The local bus may also be used to store data that does
MPC8260
10/100BaseT
60x Bus
SDRAM/DRAM/SRAM
Channelized Data
Local Bus
SDRAM/DRAM/SRAM
ATM
Connection
Tables
SMC/I 2 C/SPI/SCC
(10BaseT)
(up to 16 channels)
TDM0
TDM3
MII
Transceiver
576 Kbps
SONET
Transceivers
Slow
Comm
PHY