参数资料
型号: WBLXT975BHCA8
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP160
封装: ROHS COMPLIANT, PLASTIC, MS-002DD-1, HQFP-160
文件页数: 19/76页
文件大小: 1004K
代理商: WBLXT975BHCA8
LXT974/LXT975 — Fast Ethernet 10/100 Quad Transceivers
26
Datasheet
Individual chip addressing allows multiple LXT974/975 devices to share the MII in either mode.
Table 15 through Table 17 show how to set up the desired operating configurations using the
Hardware Control Interface.
Table 15. Configuring the LXT974/975 via Hardware Control
Desired Configuration
Pin Name
Input Value
MDIO Registers
Auto-Negotiation Enabled on all ports1, 2, 3
AUTOENA
High
0.12 = 1
SD/TPn
Low
19.2 = 0
Auto-Negotiation Disabled on all ports4
AUTOENA
Low
0.12 = 0
Scrambler Bypassed on all ports
BYPSCR
High
19.3 = 1
Scrambler Enabled on all ports
BYPSCR
Low
19.3 = 0
1. SD/TPn must be set Low for Auto-Negotiation operation.
2. Refer to Table 16 for Hardware Control Interface functions advertised when auto-negotiation is enabled.
3. Fiber operation can be forced per port via SD/TPn pins when auto-negotiation is enabled. See Table 17 for details.
4. Refer to Table 17 for Hardware Control Interface functions available when auto-negotiation is disabled.
Table 16. Configuring LXT974/975 Auto-Negotiation Advertisements Via
Hardware Control
Desired
Configuration
1,2
Pin Settings
MDIO Registers
SD/TPn
(per port)
FDE
(global)
CFG_2
(global)
CFG_1
(global)
CFG_0
3
(global)
4.5
4.6
4.7
4.8
Advertise All
Low
Ignore
Low
Ignore
1
Advertise 100 HD
Low
High
Low
Ignore
0
1
0
Advertise 100 HD/FD
Low
High
Low
Ignore
0
1
Advertise 10 HD
Low
High
Ignore
1
0
Advertise 10 HD/FD
Low
High
Low
High
Ignore
1
0
Advertise 10/100 HD
Low
High
Ignore
1
0
1
0
1. Refer to Table 15 for basic configurations.
2. Refer to Table 17 for Hardware Control Interface functions available when auto-negotiation is disabled.
3. Auto-Negotiation is not affected by CFG_0.
相关PDF资料
PDF描述
WBLXT974BHCA8 DATACOM, ETHERNET TRANSCEIVER, PQFP160
WBLXT974BHCA8 DATACOM, ETHERNET TRANSCEIVER, PQFP160
WBLXT9785EHC.C2V DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0-865110 DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0-865111 DATACOM, INTERFACE CIRCUIT, PQFP208
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