參數(shù)資料
型號: Am79C874
廠商: Advanced Micro Devices, Inc.
英文描述: NetPHY-1LP Low Power 10/100-TX/FX Ethernet Transceiver
中文描述: NetPHY - 1LP低功率10/100-TX/FX以太網(wǎng)收發(fā)器
文件頁數(shù): 52/60頁
文件大?。?/td> 869K
代理商: AM79C874
52
Am79C874
P R E L I M I N A R Y
10 Mbps MII Transmit Timing
Figure 22.
10 Mbps MII Transmit Start of Packet Timing
Symbol
t
MTS10
t
MTH10
t
MTEP10
t
MTECRH10
t
MTECOH10
t
MTDCRL10
t
MTDCOL10
t
MTIDLE10
t
MTP10
t
MTWH10
t
MTWL10
Parameter Description
TX_EN, TXD10[3:0] Setup Time to TX_CLK Rising Edge
TX_EN, TXD10[3:0] Hold time From TX_CLK Rising Edge
Transmit Latency TX_EN Sampled by TX_CLK to Start of Packet
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
240
-
-
-
-
300
399.98
180
180
Max.
-
-
360
130
300
130
130
-
400.02
220
220
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
TX_CLK
tMTS10
TX±
tMTECRH10
tMTECLH10
tMTEP10
tMTH100
tMTS10
TX_EN
CRS
COL
TXD[3:0]
tMTP10
tMTWH10
tMTWL10
22235I-24
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