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SDRAM is one of the DRAM te
asynchronous and do not have
168-pin
DIMM
and operates at 3.3V. AOpen is the first company to support dual-SDRAM DIMMs onboard (AP5V), from Q1 1996
2
2
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S
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h
a
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d
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A memory space in Flash-ROM to simulate
battery-less design
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SIMM socket is only 72-pin, and is only
was called Single In Line. SIMM is ma
current motherboard design.
S
M
B
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t
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m
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S
M
B
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SMBus is also called I2C bus. It is a two-wire bus developed
For example, set clock of clock generator for jumper-less m
allows one host to communicate with CPU and many masters and slaves to send/receive message.
o
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chnologies that allow DRAM to use the same clock as the CPU host bus
clock signal). It is similar as
2
E
PROM operation, AOpen motherboard uses Shadow E
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single side. The golden finger signals on each side of PCB are identical. That is why it
de by FPM or
EDO
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)
a
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)
PBSRAM
to use burst mode transfer. SDRAM comes in 64-bit
)
)
DRAM and supports 32-bit data. SIMM had been phased out on
for component communication (especially for semiconductor IC).
otherboard. The data transfer rate of SMBus is only 100Kbit/s, it
113
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(EDO
and FPM are
2
PROM for jumper-less and
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