DS_FT2232D Datasheet, PDF (38/61 Pages) List of Unclassifed Manufacturers – Future Technology Devices International Ltd

Document No.: FT_000173
FT2232D DUAL USB TO SERIAL UART/FIFO IC Datasheet
Version 2.05
Clearance No.: FTDI# 127
8.3 245 FIFO Mode Timing Diagram
Figure 8.6 FIFO Read Cycle
Time
Description
T1
RD# Active Pulse
Width
T2
RD# to RD Pre-
Charge Time
T3
RD# Active to
Valid Data
**Note 19
T4
Valid Data Hold
Time from RD#
Inactive
**Note 19
T5
RD# Inactive to
RXF#
T6
RXF# inactive after
RD# cycle
Table 8.4 Read Cycle
Min
50
50 + T6
20
0
0
80
Max
ns
ns
50
ns
25
ns
Unit
RD# Active Pulse Width
RD# to RD Pre-Charge Time
ns
Valid Data Hold Time from RD#
Inactive **Note 19
ns
RXF# inactive after RD# cycle
** Note 19: Load 30 pF at standard drive level. These times will also vary if the high output drive level
is enabled
Figure 8.7 FIFO Write Cycle
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