User Guide
148
M
M
X
X
3
3
W
W
O
O
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Open
A
with CPU and many masters and slaves to send/receive message.
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S
P
P
D
D
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SPD is a small ROM or EEPROM device resided on the DIMM or RIMM. SPD stores memory
module information such as DRAM timing and chip parameters. SPD can be used by BIOS
to
decide best timing for this DIMM or RIMM.
U
U
l
l
t
t
r
r
a
a
D
D
M
M
A
A
/
/
3
3
3
3
Unlike traditional PIO/DMA mode, which only uses the rising edge of IDE command signal to
transfer data. UDMA/33 uses both rising edge and falling edge, the data transfer rate is double of
the PIO mode 4 or DMA mode 2.
16.6MB/s x2 = 33MB/s
U
U
S
S
B
B
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U
U
n
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USB is a 4-pin serial peripheral bus that is capable of cascading low/medium speed peripherals
(less than 10Mbit/s) such as keyboard, mouse, joystick, scanner, printer and modem. With USB, the
traditional complex cables from back panel of your PC can be eliminated.