参数资料
型号: CORE10/100-RM
厂商: Microsemi SoC
文件页数: 90/106页
文件大小: 0K
描述: IP CORE10/100 ETHERNET MAC
标准包装: 1
系列: *
Transmit and Receive Functional Timing Examples
Core10100 v4.0
(2)
(4)
(6)
(8)
(10)
(1)
(3)
(5)
(7)
(9)
CLKDMA
DATAACK
DATAREQ
DATARW
DATAEOB
DATAI[15:0] 0000
07FF
0000
DATAADDR[31:0] FFFF FFFF
TWE
TWADDR[9:0] 000
TWDATA[15:0] 0000
Figure B-5 · Transmit Descriptor Fetch in 16-Bit Mode
Transmit Descriptor and Data Fetch in 8-Bit Mode
1.
2.
3.
4.
5.
6.
7.
Four reads of the first to fourth 8-bit words of the transmit descriptor.
Four reads of the fifth to eighth 8-bit words of the transmit descriptor.
Four reads of the ninth to twelfth 8-bit words of the transmit descriptor.
Read the first 8-bit data fetch and write into the transmit FIFO.
Read the second 8-bit data fetch and write into the transmit FIFO.
Read the third 8-bit data fetch and write into the transmit FIFO.
Read the fourth 8-bit data fetch and write into the transmit FIFO.
(5)
(7)
(1)
(2)
(3)
(4)
(6)
CLKDMA
DATAACK
DATAREQ
DATARW
DATAEOB
DATAI[7:0] 0 0
DATAADDR[31:0]
TWE
TWADDR[10:0]
000
FF
00
Figure B-6 · Transmit Descriptor Fetch in 8-Bit Mode
90
v4.0
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