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FT122 Datasheet(PDF) 37 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) 37 Page - Future Technology Devices International Ltd.

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Copyright © 2014 Future Technology Devices International Limited
37
Document No.: FT_000647
FT122 ENHANCED USB DEVICE CONTROLLER WITH PARALLEL
BUS
IC Datasheet Version 1.1
Clearance No.: FTDI#
313
Figure 8-2 Parallel interface timing
Symbol
Parameter
VCCIO=3.3V VCCIO=1.8V
Unit
Min
Max
Min
Max
Single-cycle DMA Timings:
tRHSH
DMREQ High to RD_n/WR_n High Time
120
120
ns
tAHRH
DMACK_n High to DMREQ High Time
330
330
ns
tSHAH
RD_n/WR_n High to DMACK_n High Time
130
130
ns
tEL
EOT_n
Low
Pulse
Width
(Simultaneous
DMACK_n, RD_n/WR_n and EOT_n low time)
10
10
ns
Burst DMA Timings:
tSLRL
RD_n/WR_n Low to DMREQ Low Time
15
40
ns
tRHSH
DMREQ High to RD_n/WR_n High Time
40
120
ns
tSHAH
RD_n/WR_n High to DMACK_n High Time
3
130
ns
EOT Timings:



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