參數(shù)資料
型號(hào): FT2232C
廠商: Electronic Theatre Controls, Inc.
英文描述: FT2232C Dual USB UART / FIFO I.C.
中文描述: FT2232C雙USB的UART / FIFO的集成電路
文件頁(yè)數(shù): 34/51頁(yè)
文件大?。?/td> 907K
代理商: FT2232C
DS2232C Version 1.4
Future Technology Devices International Ltd. 2005 Page 34 of 54
FT2232C Dual USB UART / FIFO I.C.
245 FIFO Mode TIMING DIAGRAMS
Figure 19 - 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 19
Valid Data Hold Time from RD# Inactive
**
Note 19
20
0
50
ns
ns
T5
T6
RD# Inactive to RXF#
RXF# inactive after RD# cycle
0
80
25
ns
ns
**
Note 19 :
Load 30 pF at standard drive level. These times will also vary if the high output drive level is enabled.
Figure 20 - 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
RXF#
RD#
D[7...0]
T3
T1
T5
T6
T2
T4
Valid Data
Valid Data
D[7...0]
WR
TXE#
T7
T12
T11
T8
T9
T10
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