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FT232H Datasheet(PDF) 29 Page - Future Technology Devices International Ltd.

Part # FT232H
Description  FT232H Single Channel Hi-Speed USB to Multipurpose UART/FIFO IC
PDF  65 Pages
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Manufacturer  FTDI [Future Technology Devices International Ltd.]
Direct Link  http://www.ftdichip.com
Logo FTDI - Future Technology Devices International Ltd.

FT232H Datasheet(HTML) 29 Page - Future Technology Devices International Ltd.

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Copyright © 2014 Future Technology Devices International Limited
29
Document No.: FT_000288
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 1.81
Clearance No.: FTDI #199
4.5 FT245 Style Asynchronous FIFO Interface Mode Description
The FT232H can be configured as an asynchronous FIFO interface. This mode is similar to the
synchronous FIFO interface with the exception that the data is written to or read from the FIFO on the
falling edge of the WR# or RD# signals.
This mode does not provide a CLKOUT signal and it does not expect an OE# input signal. The following
diagrams illustrate the asynchronous FIFO mode timing.
Figure 4.5 FT245 Asynchronous FIFO Interface READ Signal Waveforms
Figure 4.6 FT245 Asynchronous FIFO Interface WRITE Signal Waveforms
Time
Description
Min
Max
Units
T1
RD# inactive to RXF#
1
14
ns
T2
RXF# inactive after RD# cycle
49
ns
T3
RD# to DATA
1
14
ns
T4
RD# active pulse width
30
ns
T5
RD# active after RXF#
0
ns
T6
WR# active to TXE# inactive
1
14
ns
T7
TXE# active to TXE# after WR# cycle
49
ns
T8
DATA to WR# active setup time
5
ns
T9
DATA hold time after WR# inactive
5
ns
T10
WR# active pulse width
30
ns
T11
WR# active after TXE#
0
ns
Table 4.2 Asynchronous FIFO Timings (based on standard drive level outputs)



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