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參數(shù)資料
| 型號(hào)： | DNC3X3125 |
| 廠商： | Lineage Power |
| 英文描述： | 10/100 Mbits/s Ethernet Transceiver Macrocell(10M位/秒和100 M位/秒以太網(wǎng)收發(fā)器宏單元) |
| 中文描述： | 10/100 Mbits /秒以太網(wǎng)收發(fā)器宏單元（1000萬位/秒和100海里位/秒以太網(wǎng)收發(fā)器宏單元） |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 460K |
| 代理商： | DNC3X3125 |
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10
DNC3X3125
10/100 Mbits/s Ethernet Transceiver Macrocell
Advance Data Sheet
March 2000
4
Signal Information
(continued)
Table 6. Control/Status Signals
Signal
AUTO_EN
Type
I
Description
Autonegotiation Enable.
When this signal is high, autonegotiation is
enabled. Pulsing this signal will cause autonegotiation to restart. This input
has the same function as register 0, bit 12. This input and the register bit are
ANDed together.
Full-Duplex Mode.
When this signal is set high, the PHY will be in full-
duplex mode. A low on this signal will put it in half-duplex mode. This signal
is ignored when autonegotiation is enabled. This is the same function as
register 0, bit 8. This input and the register bit are ORed together.
Carrier Sense Select.
This signal may be used to select the mode of
MCRS operation. When this signal is pulled high, MCRS will be asserted on
receive activity only. This is the same function as register 29, bit 10. This
input and the register bit are ORed together.
Serial Mode Select.
This signal may be used to set the SERIAL_SEL func-
tion of register 30, bit 1 by pulling it high, if station management is unavail-
able. This input and the register bit are ORed together.
Carrier Integrity Enable.
If this signal is pulled high, it will enable the
carrier integrity function of register 29, bit 3, if station management is
unavailable. This input and the register bit are ORed together.
Encoder/Decoder Bypass.
If this signal is pulled high, it will enable the
encoder/decoder bypass function of register 29, bit 6, if station management
is unavailable. This input and the register bit are ORed together.
Scrambler/Descrambler.
This signal may be used to enable the scrambler/
descrambler bypass function by pulling this signal high, if station manage-
ment is unavailable. This is the same function as register 29, bit 4. This
input and the register bit are ORed together.
Speed.
This signal can be used to select the operating speed and is the
same function as register 0, bit 13:
F_DUP
I
CRS_SEL
I
SER_SEL_PIN
I
CARIN_IN
I
EDBT
I
SDBT
I
SPEED_PIN
I
I
If this signal is pulled high, it will enable 100 Mbits/s operation.
I
If this signal is pulled low, it will enable 10 Mbits/s operation.
This signal is ignored when autonegotiation is enabled. This signal and the
register bit are ANDed.
Management Address [4:0]
. These signals are used to set the MGT
address. Management address 00000 is not a broadcast address.
FX_MODE
. When this signal is high, it puts DNC3X3125 in fiber-optic
mode. This signal is ORed with register 29, bit 0 [29.0].
Fast Test
. This signal should be low for normal operation. When high, the
internal timers run faster than normal, with the speedup determined by
FASTSEL[1:0]
Fast Speed Select.
When FASTTEST is high, the speedup of the timers
(10 Mbit/s NLP link, 10 Mbit/s jabber, reset timers, autonegotiation counters)
is as follows:
00 = No speedup.
01 = 16x speedup.
10 = 64x speedup.
11 = 256x speedup. (Autonegotiation does not work at this speedup.)
Enhanced Link Integrity Test Function.
When this input is high, The link
will be deasserted when 31 Manchester violations have occurred.
MGT_ADD[4:0]
I
FX_MODE
I
FASTTEST
I
FASTSEL[1:0]
I
LITF_ENH
I
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