FT240X USB 8-BIT FIFO IC Datasheet
Version 1.3
Document No.: FT_000626 Clearance No.: FTDI# 259
3.7 FT240X FIFO WRITE Timing Diagrams
T12
T11
TXE#
WR
T8
T7
T9
T10
Valid Data
D[7...0]
Figure 3.4 FIFO Write Cycle
Time
T7
Description
Minimum Maximum Unit
WR Active Pulse Width
WR to WR Pre-Charge Time
50
50
-
-
ns
ns
T8
Valid data setup to WR falling
edge*
T9
20
0
-
-
ns
ns
Valid Data Hold Time from WR
Inactive*
T10
T11
T12
WR Inactive to TXE#
5
25
-
ns
ns
TXE# Inactive After WR Cycle
80
Table 3.11 FIFO Write Cycle
*Load = 30pF
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