參數(shù)資料
型號: E-110
廠商: LSI Corporation
英文描述: 100BASE-T Fast Ethernet Core(100BASE-T快速以太網(wǎng)處理芯片 Fast Ethernet Core)
中文描述: 100兆- T的快速以太網(wǎng)核心(100兆- T的快速以太網(wǎng)處理芯片快速以太網(wǎng)核心)
文件頁數(shù): 36/130頁
文件大?。?/td> 770K
代理商: E-110
2-4
Signal Descriptions
TPDN
Transmit Packet Done
When asserted, the TPDN signal indicates successful
completion of the packet transmit process. The MAC
keeps TPDN asserted until the MAC receives a fresh
request to transmit, which is indicated when the MAC
control module asserts the TPSF signal. The TPDN
signal is also connected to the optional MAC control
module core.
Output
TPEF
Transmit Packet End of Frame
The host asserts the TPEF signal to indicate the last byte
of the transmit packet is available from the host. TPEF
must be valid for two MTXC clock periods before it is
deasserted.
Input
TPRT
Transmit Packet Retry
The MAC asserts the TPRT signal to indicate that the
MAC function encountered at least one collision during a
transmit attempt. The MAC asserts TPRT until the MAC
receives a fresh request to transmit, which is indicated
when the MAC control module asserts TPSF.
Output
TPSF
Transmit Packet Start Of Frame
The MAC control module, if implemented, asserts the
TPSF signal to request the E-110 core to transmit a new
packet. If the MAC control module is not implemented,
the host must assert the TPSF signal.
Input
This paragraph describes how the host must control the
TPSF signal. The host interface asserts the TPSF signal
to request the MAC to transmit a new packet. The host
must keep the TPSF signal asserted for one transmit
clock period after the E-110 core asserts the TPUD
signal. The TPSF signal is synchronous to MTXC.
For a description of how the MAC control module controls
the TPSF signal, see Section 2.1.3, “MAC Control Mod-
ule Signals (optional)” on page 2-7.
TPUD
Transmit Packet Data Used
The E-110 MAC function asserts the TPUD signal to
indicate that the preamble has been transmitted. Every
two clocks thereafter, the host must place the TPD[7:0]
signals on the bus for the MAC. The MAC keeps TPUD
asserted until the MAC accepts all the data bytes in the
transmit packet from the host.
Output
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