參數(shù)資料
型號: AM79C874VC
廠商: ADVANCED MICRO DEVICES INC
元件分類: 網(wǎng)絡(luò)接口
英文描述: NetPHY-1LP Low Power 10/100-TX/FX Ethernet Transceiver
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP80
封裝: 12 X 12 MM, PLASTIC, MO-136BAM, TQFP-80
文件頁數(shù): 48/60頁
文件大小: 869K
代理商: AM79C874VC
48
Am79C874
P R E L I M I N A R Y
MII Signals
100 Mbps MII Transmit Timing
Figure 18.
100 Mbps MII Transmit Start of Packet Timing
Symbol
t
MTS100
t
MTH100
t
MTEJ100
t
MTECRH100
t
MTECOH100
t
MTDCRL100
t
MTDCOL100
t
MTIDLE100
t
MTP100
t
MTWH100
t
MTWL100
Parameter Description
TX_ER,TX_EN, TXD[3:0] Setup Time to TX_CLK Rising Edge
TX_ER, TX_EN, TXD[3:0] Hold time From TX_CLK Rising Edge
Transmit Latency TX_EN Sampled by TX_CLK to First Bit of /J/
CRS Assert From TX_EN Sampled HIGH
COL Assert From TX_EN Sampled HIGH
CRS De-assert From TX_EN Sampled LOW
COL De-assert From TX_EN Sampled LOW
Required De-assertion Time Between Packets
TX_CLK Period
TX_CLK HIGH
TX_CLK LOW
Min.
12
0
60
-
-
-
13
120
39.998
18
18
Max.
-
-
140
40
200
160
240
-
40.002
22
22
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
TX_CLK
TX_EN
t
MTS100
CRS
COL
TXD[3:0]
TX_ER
TX±
t
MTWH100
t
MTWL100
t
MTP100
t
MTECRH100
t
MTECOH100
t
MTEJ100
t
MTS100
t
MTH100
/J/
22235I-20
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