参数资料
型号: WJLXT971ALC.A4-857344
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64
文件页数: 21/80页
文件大小: 931K
代理商: WJLXT971ALC.A4-857344
Page 28
Cortina Systems LXT972A Single-Port 10/100 Mbps PHY Transceiver
LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
5.5 Establishing Link
For pin settings used during a hardware reset, see Section 5.4.4, Hardware Configuration
Settings. During a hardware reset, configuration settings for auto-negotiation and speed
are read in from pins, and register information is unavailable for 1 ms after de-assertion of
the reset.
5.4.4
Hardware Configuration Settings
The LXT972A PHY provides a hardware option to set the initial device configuration. As
listed in Table 13, the hardware option uses the hardware configuration pins, the settings
for which provide control bits.
5.5
Establishing Link
Figure 6 shows an overview of link establishment for the LXT972A PHY.
Note:
When a link is established by using parallel detection, the LXT972A PHY sets the duplex
mode to half-duplex, as defined by the IEEE 802.3 standard.
Table 13
Hardware Configuration Settings
Desired Mode
LED/CFG
Pin
Settings1
Resulting register bit Values
Control Register
Auto-Negotiation Advertisement
Register
Auto-Neg.
Speed
(Mbps)
Duplex
123
Auto-
Neg.
0.12
Speed
0.13
Full-
Duplex
0.8
100
BASE-TX
Full-
Duplex
4.8
100
BASE-
TX
4.7
10
BASE-T
Full-
Duplex
4.6
10
BASE-T
4.5
Disabled
10
Half
LLL
0
00
N/A
Auto-Negotiation
Advertisement
Full
L
H
0
1
100
Half
L
H
L
1
0
Full
L
H
1
Enabled
100
Only
Half
H
L
1
10
0
1
0
Full/Half
H
L
H
1
0
10/100
Half Only
H
L
1
0
1
0
1
Full or Half
H
1
1. L = Low, and H = High. For LED/CFG pin assignments, see Section 3.0, Ball and Pin Assignments
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WJLXT971ALE.A4-857343 DATACOM, ETHERNET TRANSCEIVER, PQFP64
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