參數(shù)資料
型號(hào)： GCIXF440ACT
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù)： 83/128頁
文件大?。?/td> 1262K
代理商： GCIXF440ACT
Intel
IXF1002 Dual Port Gigabit Ethernet Controller
Datasheet
83
CRC error
The 32-bit CRC, received with the frame, did not match the CRC calculated upon reception.
Receive error
An receive error was detected during frame reception.
Frame too short
A frame containing less than 64 bytes (including CRC) was received.
Frame too long
A frame containing more than the programmed maximum size (in PKT_MAX_SIZE register)
was received.
6.5.5
Flow Control
The IXF1002 identifies standard flow-control frames during reception. If a flow-control frame is
received and flow-control mode is enabled (TX_RX_PARAM<FLCE>), frame transmission will
be stopped until expiration of the pause time. If flow-control frames are received during frame
transmission, the frame will be completely transmitted on the line, and transmission will then stop.
The IXF1002 identifies flow-control frames according to the field matching described in
Table 13
,
and correctness of the CRC.
The value of fields 17
–
18 in the frame indicates the transmit pause time, represented in units of
slot times.
By default, flow-control frames are not loaded into the receive FIFO and are discarded following
identification, unless the IXF1002 is programmed to pass them (TX_RX_ERR<PFLC>).
6.6
MAC Loopback Operations
The IXF1002 supports two loopback modes:
Internal loopback
External loopback
6.6.1
Internal Loopback Mode
The internal loopback mode enables verification of correct internal logic operation. In this mode,
frames loaded in the transmit FIFO are transferred to the receive FIFO through the transmit logic
and receive logic. In the internal loopback mode, the IXF1002 disconnects from the network.
Frames are not transmitted onto the line, and frames received from the line are rejected.
Table 13. Flow-Control Field Matching
Byte Number
Value (Canonic Form)
Destination Address
1-6
01-80-C2-00-00-01
Type
13-14
88-08
Op-Code
15-16
00-01
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