- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369734 > LDB901 LDB901 - LDB901 Universal Demo Board for 10BASE-T and AUI Applications PDF資料下載
參數(shù)資料
| 型號(hào)： | LDB901 |
| 英文描述： | LDB901 - LDB901 Universal Demo Board for 10BASE-T and AUI Applications |
| 中文描述： | LDB901 - LDB901通用演示板的10Base - T的和AUI應(yīng)用 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 224K |
| 代理商： | LDB901 |
Universal Demo Board for 10BASE-T and AUI Applications
—
LDB901
Developer Manual
11
4.0
Jumpers
There are 17 jumpers on the LDB901 Demo Board. There are nine 3-pin jumpers that can be set
High by placing a jumper across pins 1 and 2 or can be set Low by placing a jumper across pins 2
and 3. There are seven 2-pin jumpers that are either installed or left open and one 3X2 Header
(JP11).
Table 5
describes these jumpers and their functions.
Table 5. LDB901 Jumper Descriptions
Ref Des
Symbol
Function
JP1
UTP
(901)
DSQE
(907/908)
Unshielded Twisted-Pair:
Selects media termination for LXT901 only.
Set High to select 100
termination for unshielded TP. Set Low to select 150
termination for shielded TP.
Signal Quality Error Disable: Disables SQE for LXT907 and LXT908 only. Set High to disable SQE.
Set Low to enable SQE.
JP2
PAUI
Port/AUI Selection:
Selects active port. Set High to select AUI port. Set Low to select TP port. If
Automatic Port Selection is enabled, PAUI is ignored.
JP3
NTH
Normal Threshold: Set High to select normal TP squelch threshold. Set Low to reduce normal
threshold by 4.5dB.
JP4
MDO
Mode Select 0:
Selects controller compatibility mode as specified in
Table 6
.
JP5
MD1
Mode Select 1:
Selects controller compatibility mode as specified in
Table 6
.
JP6
LI
Link Test Enable:
Set High to enable link integrity test. Set Low, link integrity test is disabled.
JP7
TEST
Test:
Connect to VCC.
JP8
AUTOSEL
Automatic Port Select:
With jumper installed automatic port selection is enabled. (When
automatic port selection is enabled, the LDB901 defaults to the Twisted-Pair port until the link
integrity test fails.)
With the jumper open, manual port selection is enabled and PAUI (JP2) determines the active port.
JP9
PDN
Power Down:
This jumper enables Power Down Mode. With the jumper open, Power Down Mode
is disabled.
JP10
FDE
Full Duplex:
This jumper enables Full Duplex Mode. With the jumper open, the LDB901 operates
in normal half duplex mode.
JP11
LBK
Loopback:
If jumper is placed in pins 2 and 4, standard loopback function is enabled. Data
transmitted from the back-end is internally looped back through the device and returned to the back-
end.
JP12
-
Transformer Termination:
JP12 and JP13 selects transformer termination.
Leave both jumpers open when evaluating LXT901 or LXT907. This configuration requires
magnetics with a 1:
√2
ratio for the transmit transformer and a 1: 1 ratio for the receive transformer.
Install both jumpers when evaluating LXT908. This configuration requires magnetics with a 1:2 ratio
for the transmit transformer and a 1:1 ratio for the receive transformer.
JP13
-
JP19
-
Voltage Regulator: Jumpers installed on pins 1 and 2 selects 5V operation. Jumpers installed on
pins 2 and 3 converts to 3.3V.
1
JP20
-
Voltage Dividers: When jumpers are left open, attenuates the transmitted signals for 3.3V
operation. When the jumpers are installed, attenuation circuitry is bypassed.
JP21
JP22
1. JP20, JP21 and JP22 must be left open when operating at 3.3V.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LDD-A4302RI | Optoelectronic |
| LDD-A4303RI | Optoelectronic |
| LDD-A4304RI | Optoelectronic |
| LDD-A4306RI | Optoelectronic |
| LDD-A5002RI | Optoelectronic |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LDBAA2120JC5N0 | 功能描述:薄膜電容器 16volts 0.012uF 5% RoHS:否 制造商:Cornell Dubilier 產(chǎn)品類型: 電介質(zhì):Polyester 電容:0.047 uF 容差:10 % 電壓額定值:100 V 系列:225P 工作溫度范圍:- 55 C to + 85 C 端接類型:Radial 引線間隔:9.5 mm |
| LDBAA2150GC5N0 | 制造商:Arcotronics Group 功能描述:Capacitor, Film SMT, 1206, 0.015uF 16 VDC 1206 2% |
| LDBAA2150JC5N0 | 功能描述:薄膜電容器 16volts 0.015uF 5% RoHS:否 制造商:Cornell Dubilier 產(chǎn)品類型: 電介質(zhì):Polyester 電容:0.047 uF 容差:10 % 電壓額定值:100 V 系列:225P 工作溫度范圍:- 55 C to + 85 C 端接類型:Radial 引線間隔:9.5 mm |
| LDBAA2180GC5N0 | 功能描述:薄膜電容器 16Volts 18pF 2% RoHS:否 制造商:Cornell Dubilier 產(chǎn)品類型: 電介質(zhì):Polyester 電容:0.047 uF 容差:10 % 電壓額定值:100 V 系列:225P 工作溫度范圍:- 55 C to + 85 C 端接類型:Radial 引線間隔:9.5 mm |
| LDBAA2180JC5N0 | 功能描述:薄膜電容器 16Volts 18pF 5% RoHS:否 制造商:Cornell Dubilier 產(chǎn)品類型: 電介質(zhì):Polyester 電容:0.047 uF 容差:10 % 電壓額定值:100 V 系列:225P 工作溫度范圍:- 55 C to + 85 C 端接類型:Radial 引線間隔:9.5 mm |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。