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A
K
7
7
-
4
0
0
N
/
A
A
K
7
7
-
4
0
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A
E
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d
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The ECC mode needs 8 ECC bits for 64-bit data. Each time memory is accessed; ECC bits are updated and checked by a
special algorithm. The ECC algorithm has the ability to detect double-bit error and automatically correct single-bit error while
parity mode can only detect single-bit error.
E
E
P
R
O
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E
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2
Also known as E
PROM. Both EEPROM and
technology is different. Size of EEPROM is much smaller than flash ROM.
E
P
R
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M
(
E
r
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Traditional motherboard stores BIOS code in EPROM. EPROM can only be erased by ultra-violet (UV) light. If BIOS has to be
upgraded, you need to remove EPROM from motherboard, clear by UV light, re-program, and then insert back.
E
V
6
B
u
s
E
V
6
B
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EV6 Bus is the technology of Alpha processor from Digital Equipment Corporation. EV6 bus uses both rising and falling clock
edge to transfer data, similar as DDR RAM or ATA/66 IDE bus.
EV6 Bus Speed = CPU external bus clock x 2.
200 MHz EV6 bus, 200MHz = 100 MHz external bus clock x 2
K
7
7
-
4
0
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G
N
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Flash ROM
m
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m
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can be re-programmed by electronic signals, but the interface
80
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