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CHAPTER 4 VPD and ENV Commands
VPD—Display Vital Product Data ...........................................................................4-1
ENV—Set Environment ...........................................................................................4-2
CHAPTER 5 Functional Description
MBX Block Diagrams ..............................................................................................5-1
MBX Features Summary ..........................................................................................5-5
MBX Features Description .......................................................................................5-6
General Description ...........................................................................................5-6
Processor ...........................................................................................................5-7
MPC860 .....................................................................................................5-7
MPC821 .....................................................................................................5-8
Real-Time Clock/Timer Functions ....................................................................5-8
DRAM ...............................................................................................................5-9
Flash Memory ..................................................................................................5-10
NVRAM ..........................................................................................................5-11
On-board Backup Battery ................................................................................5-11
Switches and Status Indicators ........................................................................5-12
Abort Switch ............................................................................................5-12
Reset Switch .............................................................................................5-12
Status Indicators .......................................................................................5-13
Power Monitor Circuit .....................................................................................5-13
Peripheral I/O Controller .................................................................................5-13
Asynchronous Serial Port .........................................................................5-13
Parallel Port ..............................................................................................5-14
2.88MB Floppy Disk Drive Controller ....................................................5-15
Keyboard and Mouse Interface ................................................................5-15
Ethernet Interface ............................................................................................5-15
PCMCIA Interface ..........................................................................................5-16
LCD Interface (MBX821 Only) ......................................................................5-16
MPC8xx Serial Communications Interface .....................................................5-17
MPC8xx Bus Interface ....................................................................................5-18
PCI/ISA Interface ............................................................................................5-18
PCI/ISA Bridge Controller ..............................................................................5-19
Polyswitches (Self-resetting Fuses) .................................................................5-20
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