Motorola MCPN750A, Инструкция по установке и эксплуатации

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6-1
6
6 Functional Description
Introduction
This chapter describes the MCPN750A single-board computer on a block
diagram level. The General Description provides an overview of the
MCPN750A, followed by a detailed description of several blocks of
circuitry.
Figure 6-1 shows a block diagram of the overall board
architecture.
Detailed descriptions of other MCPN750A blocks, including
programmable registers in the ASICs and peripheral chips, can be found in
the MCPN750A CompactPCI Single Board Computer Programmer’s
Reference Guide (MCPN750A/PG). Refer to it also for additional
functional description information.
Features
The following table summarizes the features of the MCPN750A single-
board computers.
Table 6-1. MCPN750A Features
Feature Description
Microprocessor MPC750 PowerPC processor
ECC DRAM 16MB-256MB of memory through onboard DRAM devices
L2 cache memory Populated with 1MB on base board
Flash Memory
Two 32-pin PLCC sockets (1MB 16-bit Flash); four soldered devices
(4MB 64-bit Flash)
Real-time clock
8KB NVRAM with RTC and battery backup (SGS-Thomson
M48T559)
Switches
ABORT/RESET
as switch S1 on front panel
Status LEDs three:
BFL
,
CPU
,
and
HOT SWAP STATUS
Watchdog timers Provided in SGS-Thomson M48T559 and Raven ASIC