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参数资料
| 型号： | WJLXT972MLC.A4-864101 |
| 厂商： | CORTINA SYSTEMS INC |
| 元件分类： | 网络接口 |
| 英文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| 封装： | ROHS COMPLIANT, LQFP-48 |
| 文件页数： | 14/99页 |
| 文件大小： | 1526K |
| 代理商： | WJLXT972MLC.A4-864101 |
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Page 21
Cortina Systems LXT971A Single-Port 10/100 Mbps PHY Transceiver
LXT971A PHY
Datasheet
249414, Revision 5.2
13 September 2007
4.0 Signal Descriptions
D1
D2
5
6
TxSLEW0
TxSLEW1
I
Tx Output Slew Controls 0 and 1.
These pins select the TX output slew rate (rise and fall time)
as follows:
TxSLEW1
TxSLEW0
Slew Rate (Rise and Fall Time)
0
3.0 ns
0
1
3.4 ns
1
0
3.9 ns
1
4.4 ns
C2
4
RESET_L
I
Reset.
This active Low input is ORed with the control register Reset
bit (register bit 0.15). The PHY reset cycle is extended to 258
μs (nominal) after reset is de-asserted.
H1
17
RBIAS
AI
Reference Current Bias.
This pin provides bias current for the internal circuitry. Must
be tied to ground through a 22.1 k
Ω, 1% resistor.
H8
33
PAUSE
I
Pause.
When set High, the PHY advertises Pause capabilities during
auto-negotiation.
H7
32
SLEEP
I
Sleep.
When set High, this pin enables the PHY to go into a low-
power sleep mode. The value of this pin can be overridden by
register bit 16.6 when in managed mode.
E8
39
PWRDWN
I
Power Down.
When set High, this pin puts the PHY in a power-down mode.
B1
C1
1
2
REFCLK/XI
XO
I and
O
Reference Clock Input / Crystal Input and Crystal Output.
A 25 MHz crystal oscillator circuit can be connected across XI
and XO. A clock can also be used at XI.
For clock requirements, see Section 5.3.2, Clock
Requirements, on page 30 in the Functional Description
section.
E6
F7
F8
38
37
36
LED/CFG1
LED/CFG2
LED/CFG3
I/O
LED Drivers 1-3.
These pins drive LED indicators. Each LED can display one
of several available status conditions as selected by the LED
Configuration Register. (For details, see Table 60, LED
Configuration Inputs 1-3.
These pins also provide initial configuration settings. (For
details, see Table 13, Hardware Configuration Settings, on
page 33.)
Table 9
Configuration and LED Driver Signal Descriptions (Sheet 2 of 2)
PBGA
Pin#
LQFP
Pin#
Symbol
Type
Signal Description
相关PDF资料 |
PDF描述 |
|---|---|
| WJLXT972MLC.A4-864115 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4SE001 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4SE000 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4SE001 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4SE000 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
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