參數(shù)資料
型號(hào): FT245BQ
廠商: Electronic Theatre Controls, Inc.
英文描述: FT245BQ USB FIFO ( USB - Parallel ) I.C.
中文描述: FT245BQ USB先進(jìn)先出(USB端口-并行)集成電路
文件頁(yè)數(shù): 11/24頁(yè)
文件大?。?/td> 505K
代理商: FT245BQ
DS245BL Version 1.6 Future Technology Devices Intl. Ltd. 2005
Page 11 of 24
FT245BL USB FIFO ( USB - Parallel ) I.C.
FT245BL TIMING DIAGRAM – FIFO READ CYCLE
Time
T1
Description
RD Active Pulse Width
Min
50
Max
Unit
ns
T2
RD to RD Pre-Charge Time
50 + T6
ns
T3
T4
RD Active to Valid Data
***
Note 4
Valid Data Hold Time from RD Inactive
***
Note 4
20
0
50
ns
ns
T5
T6
RD Inactive to RXF#
RXF inactive after RD cycle
0
80
25
ns
ns
***
Note 4
- Load 30 pF
FT245BL TIMING DIAGRAM – FIFO WRITE CYCLE
Time
T7
T8
T9
T10
T11
T12
Description
WR Active Pulse Width
WR to WR Pre-Charge Time
Data Setup Time before WR inactive
Data Hold Time from WR inactive
WR Inactive to TXE#
TXE inactive after WR cycle
Min
50
50
20
0
5
80
Max
Unit
ns
ns
ns
ns
ns
ns
25
valid data
TXE#
T7
T8
T12
T9
T10
T11
WR
D0..D7
D0..D7
RD#
RXF#
valid data
T1
T2
T6
T3
T4
T5
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