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Chapter 3
CPU (U1)
The LittleBoard 700 offers three Intel processor choices; high performance 933MHz Low Voltage (LV)
Pentium® III processor, 650MHz LV Celeron® processor, or the low cost, 400MHz LV Celeron
processor.
Celeron Processors
The Celeron (0.13µ) processors at 650MHz or 400MHz have 256kB L2 Cache on board and use a
100MHz FSB (front side bus). The Celeron processors require a heatsink, but no fan.
Pentium III Processor
The Pentium III (0.13µ) processor at 933MHz has 512kB L2 Cache on board and uses a 133MHz FSB.
The Pentium III processor requires a heatsink and fan.
Memory
The LittleBoard 700 memory consists of the following elements:
•
SDRAM
•
Flash memory
•
Serial EEPROM (SEEP)
SDRAM Memory
The LittleBoard 700 supports a single standard 168-pin DIMM slot.
• DIMM slot can support up to 1GB of memory
• Supports PC 133 (133MHz, 7.5ns) and PC 100 (100MHz, 10ns)
• +3.3V SDRAM
NOTE
Ampro recommends using only PC 133 (133MHz), 3.3V, 7.5ns, 168-
pin, SDRAM DIMM, but PC 100 (100MHz, 10ns) will function. PC
133 provides the best performance for the Pentium processor, and
enhances the performance of the Celeron processors.
Flash Memory (U17)
There is an 8-bit wide, 512kB flash device used for system BIOS that is connected to the Southbridge,
VT82C686B, through an ISA bus transceiver. The BIOS is re-programmable and the supported features
are detailed in Chapter 4, BIOS Setup.
Serial EEPROM (SEEP)
The 2-wire Serial EEPROM (SEEP) contains 4k-bits and at least 512-bit area is reserved for the user.
The SEEP is used to store system parameters for battery-free boot capability when there is no battery
present. The SEEP uses the SMBus as its 2-wire interface.
22
Reference Manual
Hardware
LittleBoard 700
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