參數(shù)資料
型號: MSC8144E
廠商: 飛思卡爾半導體(中國)有限公司
元件分類: 數(shù)字信號處理
英文描述: Quad Core Digital Signal Processor
中文描述: 四核心數(shù)字信號處理器
文件頁數(shù): 56/80頁
文件大?。?/td> 1145K
代理商: MSC8144E
MSC8144E Quad Core Digital Signal Processor Data Sheet, Rev. 6
Freescale Semiconductor
56
Figure 29
shows the RMII transmit and receive AC timing diagram.
Figure 30
provides the AC test load.
2.7.10.5
SMII AC Timing Specification
Figure 31
provides the AC test load.
Figure 29. RMII Transmit and Receive AC Timing
Figure 30. AC Test Load
Table 49. SMII Mode Signal Timing
Characteristics
Symbol
Min
Max
Unit
ETHSYNC_IN, ETHRXD to ETHCLOCK rising edge set-up time
ETHCLOCK rising edge to ETHSYNC_IN, ETHRXD hold time
ETHCLOCK rising edge to ETHSYNC, ETHTXD output delay
Notes:
1.
Typical REF_CLK clock period is 8ns
2.
Measured using a 5 pF load.
3.
Measured using a 15 pF load
4.
REF_CLK duty cycle is TBD.
5.
Program GCR4 as 0x00002008
t
SMDVKH
t
SMDXKH
t
SMXR
1.5
1.0
1.5
5.0
ns
ns
ns
REF_CLK
TXD[1–0]
TX_EN
t
RMTKHDX
t
RMX
t
RMXH
t
RMXR
t
RMXF
RXD[1–0]
CRS_DV
RX_ER
t
RMRDXKH
t
RMRDVKH
Valid Data
Output
Z
0
= 50
Ω
V
DDGE
/2
R
L
= 50
Ω
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