Beyond Bits VII - Freescale Semiconductor
Beyond Bits VII - Freescale Semiconductor
Beyond Bits VII - Freescale Semiconductor
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Back to Table of Contents<br />
Ethernet Subsystem<br />
Real-time networked measurement and control<br />
Vybrid devices, depending on the<br />
particular family, have dual Ethernet<br />
controllers and an L2 switch. The<br />
dual Ethernet controller modules, in<br />
conjunction with an external Ethernet<br />
PHY, are used to add Ethernet<br />
connectivity. Hardware IEEE ® 1588<br />
time stamping provides precision<br />
clock synchronization for real-time<br />
control in networked automation, test<br />
and measurement applications. Midto<br />
high-end industrial applications<br />
typically use dual Ethernet controllers.<br />
One Ethernet MAC can be used to<br />
manage the control nodes while the<br />
other Ethernet MAC can be used to<br />
connect to a remote sever for control<br />
or for redundancy. Most industrial<br />
Ethernet options (i.e., Profinet IRT or<br />
Ethernet Subsystem<br />
Application I/F Application I/F<br />
freescale.com/Vybrid<br />
uDMA<br />
+ AHB I/F<br />
uDMA<br />
+ AHB I/F<br />
3<br />
0<br />
Profinet IRT+) require determinism,<br />
where IEEE 1588 is the enabling<br />
feature. Dual Ethernet with the L2<br />
switch allows daisy chaining which<br />
would otherwise need an expensive<br />
external switch. The function of the L2<br />
switch is to route packets from one<br />
Ethernet port to the other Ethernet<br />
port without any CPU intervention.<br />
Ethernet Subsystem<br />
Features<br />
• Dual 10/100 Ethernet MAC (MAC-<br />
NET)<br />
Hardware support for IEEE 1588<br />
standard for a precision clock<br />
synchronization protocol for<br />
networked measurement and<br />
control systems<br />
L2 Switch<br />
2<br />
1<br />
Receive<br />
FIFO<br />
Transmit<br />
FIFO<br />
<strong>Beyond</strong> <strong>Bits</strong> Vybrid Edition<br />
Ethernet MAC<br />
TOE Functions<br />
TCP/IP<br />
Performance<br />
Optimization<br />
TCP/IP<br />
Performance<br />
Optimization<br />
Reduced media independent<br />
interface (RMII) support<br />
Interfaces with unified DMA<br />
Supports wakeup from lowpower<br />
mode through magic<br />
packets<br />
Multiple clock source options for<br />
time-stamping clock<br />
• L2 Ethernet switch<br />
3-port switch<br />
Supports two MAC-NETs<br />
Supports 64-bit Atlantic/FIFO<br />
ports<br />
IEEE 1588 support<br />
Fast cut-through mode<br />
QoS with eight queues per port<br />
Port mirroring<br />
Level 3 IP snooping<br />
Configuration<br />
Statistics<br />
Register Interface<br />
• Dual unified DMA<br />
RX Control<br />
CRC<br />
Check<br />
CRC<br />
Generate<br />
Pause<br />
Frame<br />
Terminate<br />
TX Control<br />
Pause<br />
Frame<br />
Terminate<br />
MDIO<br />
Master<br />
MII/RMII<br />
Receive<br />
Interface<br />
MII/RMII<br />
Receive<br />
Interface<br />
PHY<br />
Management<br />
Interface<br />
31
Change language