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FT122 Datasheet(PDF) 36 Page - Future Technology Devices International Ltd.

Part # FT122
Description  FT122 ENHANCED USB DEVICE CONTROLLER WITH PARALLEL BUS IC Datasheet Version 1.1
PDF  47 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.

FT122 Datasheet(HTML) 36 Page - Future Technology Devices International Ltd.

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Copyright © 2014 Future Technology Devices International Limited
36
Document No.: FT_000647
FT122 ENHANCED USB DEVICE CONTROLLER WITH PARALLEL
BUS
IC Datasheet Version 1.1
Clearance No.: FTDI#
313
Symbol
Parameter
VCCIO=3.3V VCCIO=1.8V
Unit
Min
Max
Min
Max
tAVWL
A0 Valid to WR_n Low Time
0
1
ns
tWHAX
WR_n High to A0 Transition Time
1
1
ns
tWL
WR_n Low Pulse Width
30
30
ns
tWDSU
Write Data Setup Time
5
8
ns
tWDH
Write Data Hold Time
1
1
ns
tWC
Write Cycle Time
40
40
ns
t(WC-WD)
Write command to write data
40
40
ns
Read Timings:
tCLRL
CS_n (DMACK_n) Low to RD_n Low Time
0
1
ns
tRHCH
RD_n High to CS_n (DMACK_n) High Time
1
1
ns
tAVRL
A0 Valid to RD_n Low Time
0
1
ns
tRL
RD_n Low Pulse Width
30
30
ns
tRLDD
RD_n Low to Data Valid Time
25
25
ns
tRHDZ
RD_n High to Data Hi-Z Time
20
20
ns
tRHNDV
RD_n High to Next Data Valid Time
40
50
ns
tRC
Read Cycle Time
40
50
ns
t(WC-RD)
Write command to read data
40
50
ns
Table 8-7
Parallel Interface IO timing
Figure 8-1 ALE Timing



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