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| 型號(hào)： | S2068 |
| 廠(chǎng)商： | Applied Micro Circuits Corp. |
| 英文描述： | Dual GigaBit Ethernet Transceiver(雙千兆位以太網(wǎng)收發(fā)器) |
| 中文描述： | 雙千兆以太網(wǎng)收發(fā)器（雙千兆位以太網(wǎng)收發(fā)器） |
| 文件頁(yè)數(shù)： | 19/24頁(yè) |
| 文件大小： | 277K |
| 代理商： | S2068 |
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S2068
DUAL GIGABIT ETHERNET TRANSCEIVER
October 13, 2000 / Revision D
OTHER OPERATING MODES
Loopback Mode
When loopback mode is enabled, the serial data
from the transmitter is provided to the serial input of
the receiver. Loopback mode can be simultaneously
enabled for both channels using the loopback-en-
able input, LPEN.
The loopback mode provides the ability to perform
system diagnostics and off-line testing of the inter-
face to guarantee the integrity of the serial channel
before enabling the transmission medium.
Note that the high speed outputs are disabled during
loopback operation.
Test Modes
The RESET pin is used to initialize the transmit
FIFOs and must be asserted (LOW) prior to entering
the normal operational state (see section Transmit
FIFO Initialization).
Operating Frequency Rate
The S2068 is designed to operate at the Gigabit
Ethernet rate of 1.250 GHz.
output
disabled
CRU
CSU
Figure 15. S2068 Diagnostic Loopback Operation
Table 18. S2068 Receiver Timing
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