4532 Architecture
The iSPAN 4532 PMC ATM Over OC3/STM-1 Communications Controller is a member of the Interphase line of MPC8260A-based controllers for carrier-class telecommunications environments. The software selectable interface for SONET OC-3c or SDH STM-1 makes the 4532 a universal interface module and enables maximum flexibility to support multiple international standard variants with just one board.
The 64-bit, 66 MHz 60x data bus connects the core RISC CPU to the 64-bit wide SDRAM memory and the local side of the Tundra PowerSpan PCI bridge. I/O transfers across the bridge to the PCI bus are executed at 32-bits, 33 MHz or 66 MHz. Also connected to the 60x data bus is an 16-bit 8 MB downloadable Flash memory (4 MB of 8-bit Flash on original 4532 models) that can be used to store boot code and operational firmware.
The MPC8260A CPM co-processor interfaces to the SONET/ SDH ATM framer via a master UTOPIA bus interface, which in turn connects to the optical transceiver that connects to the transmission line. The MPC8260A CPM performs all ATM layer functions, including ATM layer, and up to the Common Part Convergence Sublayer (CPCS) AAL functionality. The CPM has separate and unimpeded access to a second block of 8 MB of SDRAM memory, which can be used for storing virtual connection lookup tables and traffic descriptors.
A second slave-mode UTOPIA interface from the 8260A CPM coprocessor is available to a carrier card via the PMC P3 connector, and can carry ATM traffic to and from the carrier card. In this mode, the 4532 can be used as the front-end to an ATM switch as a peripheral I/O card. Furthermore, the 8260A core RISC CPU can be disabled, in which case the 4532 utilizes the CPM co-processor and the ATM framer only to act as the physical I/O interconnect to an ATM link.
Processor/Memory
•PowerQUICC II (MPC8260A) 64-bit RISC processor allows full support of various communications protocols, reducing host CPU
processing•Dual bus architecture: 64-bit 60x bus and 32-bit local CPM bus•300 MHz core, 200 MHz CPM, 570 MIPs CPU•128 MB 64-bit SDRAM memory•8 MB downloadable 16-bit Flash memory•8 MB 32-bit Connection MemoryInterfaces
•One front access or rear access software selectable OC-3/STM-1 interface (rear access via PCI Interface Module (PIM))
•Long-range single-mode, intermediate-range single-mode and short-range multi-mode fiber interfaces available:
•Long-range single-mode fiber: Up to 24.85 miles/40 km•Intermediate-range single-mode fiber: Up to 12.4 miles/20 km•Short-range multimode fiber: Up to 1.24 miles/2 km•ATM over WAN SONET framer supports direct connection to long haul optical network
•Support for SONET and SDH overhead channels, including facility Data Link channels, alarms and indications, error and performance monitoring; connects directly to SONET/SDH facilities
•One Fast Ethernet interface on the front panel for remote boot or LAN capability with 10/100 Base-T transceiver
•One front access RS-232 TTY port provided on a 2.5 mm stereo jack•Optional JTAG debug portOptional Rear Access via PCI Interface Module (PIM)
•Standard PCI Interface Module (PIM) design•Single OC-3/STM-1 interface supporting long range single-mode, intermediate range single-mode, and short-range multimode fiber interfaces available (see above)
•Designed for use with any VITA 36-199x PIM-compatible Rear Transition Module (RTM)
PCI Interface
•32-bit, 33 MHz or 66 MHz PCI interface on P1 & P2 connectors•PCI 2.2 master/target bus interface with I2O messaging unit and four linked list DMA
•32-bit DMA exchanges for high-transfer performanceTelecom Clock Management
•The line interface can be configured in LT (clock slave) or NT (clock master) mode.
•Three line synchronization sources:•Free running internal clock•Recovered clock (loop back timing)•Network reference (via P3)•The recovered line clock is available to the carrier board via the P3 connector.
Tech Specs
| Architecture | |
| Bus Type | PMC (PCI 2.2 Compliant) |
| Bus Data Transfer | 32-bit, 33/66 MHz |
| Open Boot Interface | IEEE 1275 |
| Memory | 128 MB SDRAM |
| Mechanical | |
| Length | 149 mm (5.86 in.) |
| Width | 74 mm (2.9 in.) |
| Indicators | Board Operational, Link active |
| Operating Environment |
| Power Dissipation | 5 V: 0.4 A, 3.3 V: 1.7 A |
| Temperature | 0 to 55 ˚C (32 to 131 ˚F) |
| Storage Range | –40 to 80 ˚C (–40 to 176 ˚F) |
| Relative Humidity | 5% to 95% non-condensing |
| Altitude | 0 to 15,000 ft. |
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