參數(shù)資料
型號(hào)： 101-1226
廠商： Rabbit Semiconductor
文件頁數(shù)： 97/168頁
文件大?。?/td> 0K
描述： RCM3900 DEV KIT UNIVERSAL
標(biāo)準(zhǔn)包裝： 1
系列： RabbitCore 3900
類型： MPU 模塊
適用于相關(guān)產(chǎn)品： RCM3900
所含物品： RabbitCore 模塊、開發(fā)板、交流適配器、纜線和 Dynamic C? 光盤
其它名稱： 316-1137
RabbitCore RCM3900 User’s Manual
34
4.2.2 Ethernet Port
Figure 7 shows the pinout for the RJ-45 Ethernet port (J3). Note that some Ethernet
connectors are numbered in reverse to the order used here.
Figure 7. RJ-45 Ethernet Port Pinout
The RJ-45 connector is shielded to minimize EMI effects to/from the Ethernet signals.
The Ethernet chip supports auto MDI/MDIX on the Ethernet port to choose the Ethernet
interface automatically based on whether a crossover cable or a straight-through cable is
used in a particular setup. The Ethernet chip may spike the current draw by up to 200 mA
while it is searching to determine the type of Ethernet cable. This search is repeated every
second if no Ethernet cable is detected. If you do not plan to connect an Ethernet cable,
use the Dynamic C pd_powerdown() function call to turn off the Ethernet chip. The
pd_powerup()
function call is available to turn the Ethernet chip back on at a later time.
These function calls are described in the Dynamic C TCP/IP User’s Manual, Volume 1.
Three LEDs are placed next to the RJ-45 Ethernet
jack, one to indicate Ethernet link/activity (LNK/
ACT
), one to indicate when the RCM3900 is con-
nected to a functioning 100Base-T network (SPD),
and one (FDX/COL) to indicate whether the Ether-
net connection is in full-duplex mode (steady on) or
that a half-duplex connection is experiencing colli-
sions (blinks).
The transformer/connector assembly ground is con-
nected to the RCM3900 printed circuit board digital
ground via a ferrite bead, L1, as shown in Figure 8.
Figure 8. Ferrite Bead Isolation
ETHERNET
RJ-45 Plug
1. E_Tx+
2. E_Tx
3. E_Rx+
6. E_Rx
1
8
RJ-45 Jack
RJ-45 Ethernet Jack
L1
Chassis
Ground
Board
Ground
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10-11-2264 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:2.54mm (.100") Pitch KK?? Crimp Terminal Housing, High Pressure, 1 Circuits
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