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參數(shù)資料
| 型號： | S2060B |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | GIGABIT ETHERNET TRANSCEIVER |
| 中文描述： | 千兆以太網(wǎng)收發(fā)器 |
| 文件頁數(shù)： | 3/22頁 |
| 文件大?。?/td> | 693K |
| 代理商： | S2060B |
3
S2060
GIGABIT ETHERNET TRANSCEIVER
March 7, 2001 / Revision H
TRANSMITTER DESCRIPTION
The S2060 transmitter accepts 10-bit parallel input
data and serializes it for transmission over fiber optic
or coaxial cable media. The chip is fully compatible
with the IEEE 802.3z Gigabit Ethernet standard, and
supports the Gigabit Ethernet data rate of 1250.0
Mbps. The S2060 uses a PLL to generate the serial
rate transmit clock. The transmitter runs at 10 times
the TBC input clock, and operates in either full rate
or half rate mode. At the full VCO rate the transmitter
runs at 1.25 GHz, while in half rate mode it operates
at 625 MHz.
Parallel-to-Serial Conversion
The parallel-to-serial converter takes in 10-bit wide
data from the input latch and converts it to a serial
data stream. Parallel data is latched into the trans-
mitter on the positive going edge of TBC. The data is
then clocked into the serial output shift register. The
shift register is clocked by the internally generated
bit clock which is 10x the TBC input frequency. TX[0]
is transmitted first.
Transmit Byte Clock (TBC)
The Transmit Byte Clock input (TBC) must be sup-
plied from a clock source with 100 ppm tolerance to
assure that the transmitted data meets the Gigabit
Ethernet frequency limits. The internal serial clock is
frequency locked to TBC (125.00 MHz).
TBC may be 62.5 MHz or 125 MHz, determined by
the state of the RATEN input. Operating rates are
shown in Table 2.
Transmit Latency
The average transmit latency is 4 byte times.
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T
A
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p
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e
R
a
P
b
M
(
y
c
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)
H
e
r
F
(
C
B
T
M
t
u
p
p
)
p
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u
b
b
O
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l
e
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S
0
5
2
1
5
2
1
5
2
1
5
6
5
6
5
2
6
Table 2. Operating Rates
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