Emerson PMPPC7448 Overview, Section, Components And Features, System Controller/PCI Bridge

Section 1

Overview

The Emerson PmPPC7448 module is a Processor PCI Mezzanine Card (PPMC). It is based on the Freescale® Semiconductor PowerPC™ MPC7448 central processor unit and provides additional processing power for the baseboard, which must be compatible with PPMC architecture. The PmPPC7448 module supports various memory configurations, program- mable user Flash memory, a PCI bridge/controller, three Ethernet interfaces, two serial ports, as well as a real-time clock, and EEPROM.

COMPONENTS AND FEATURES

The following is a brief summary of the PmPPC7448 hardware components and features:

CPU: The Freescale MPC7448 RISC PowerPC microprocessor has an internal speed of up to 1.4 GHz and 166 MHz local bus speed. The MPC7448 includes 32 kilobytes separate level-one (L1) data and instruction caches and 1 megabyte L2 cache. Standard power supply is 3.3 volts, with a configuration option for both 3.3 and 5 volts.

System Controller/PCI Bridge:

The Marvell® MV64460 (Discovery™III) is a single-chip solution that provides one PCI-X bus, three integrated gigabit Ethernet Medium Access Control (MAC) controllers, two- megabit integrated Synchronous Random Access Memory (SRAM), four Independent Direct Memory Access (IDMA) engines and two XOR Direct Memory Access (DMA) engines. The 64-bit PCI interface can operate up to 66 MHz (60X) or 133 MHz (PCI-X).

SDRAM: The PmPPC7448 includes a 32M x 72-bit Double Data Rate (DDR) Synchronous Dynamic Random Access Memory (SDRAM) Small-Outline Dual In-line Memory Module (SO-DIMM). Options include 256 megabytes, 512 megabytes, 1 gigabyte, and 2 gigabytes. The inter- face implements eight additional bits to permit the use of error-correcting code (ECC). The MV64460 bridge acts as the memory controller.

Flash: The PmPPC7448 includes Flash configuration options of 32 or 64 megabytes. The

PmPPC7448 is capable of booting from either an 8-bit, 32-pin PLCC ROM socket on the

Development Mezzanine Card (DMC) or from 32-bit soldered Flash (default).

Serial I/O: The PmPPC7448 includes up to two EIA-232 ports operating between 9600 and 115,200 baud. Serial port one is always routed to the Development Mezzanine Card (DMC) serial connector; build options include connections to the front panel serial connector, or the P14 connector. When routed to P14, the port has the option of either EIA-232 or TTL signaling levels. Serial port two is routed to P14 with the same signaling options.

Ethernet: The PmPPC7448 includes three Ethernet ports. Two Broadcom BCM5461S gigabit PHY devices route Ethernet (ports 0 and 1) through connector P14. The Micrel KSZ8721CL 10/100 PHY device routes Ethernet (port 2) through a mini-USB connector on the front panel. The Broadcom and Micrel devices are IEEE 802.3-compliant.

10006757-02 PmPPC7448 User’s Manual

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