FT221XQ-T FTDI, FT221XQ-T Datasheet - Page 18
FT221XQ-T
Manufacturer Part Number
FT221XQ-T
Description
USB Interface IC USB to 8 bit SPI / FT1248 IC QFN-20
Manufacturer
FTDI
Datasheet
1.FT221XS-R.pdf
(47 pages)
Specifications of FT221XQ-T
Rohs
yes
Tradename
X-Chip
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5.5 FT1248 Timing
Figure 5.4: FT1248 Clock Format CPHA = 1
The timings will vary depending on VCCIO.
T1
T2
T3
T4
T5
T6
T7
T8
Table 5.3: 1V8 VCCIO timings
T1
T2
T3
T4
Min (ns)
Min (ns)
Copyright © 2013 Future Technology Devices International Limited
Typical (ns)
83.33ns
41.67ns
41.67ns
1
25
3
5
5
Typical (ns)
83.33ns
41.67ns
41.67ns
1
Max (ns)
30
Max (ns)
15
Description
SCLK Period
SCLK HIGH
SCLK LOW
SCLK rising or falling driving edge to
MIOSIO/MSIO
MIOSIO setup time to rising or falling sample
SCLK edge
MIOSIO hold time from rising or falling sample
SCLK edge
SS_n setup time to rising or falling SCLK edge
SS_n hold time from rising or falling sample SCLK
edge
Description
SCLK Period
SCLK HIGH
SCLK LOW
SCLK rising or falling driving edge to
MIOSIO/MSIO
Document No.: FT_000630 Clearance No.: FTDI# 263
Version 1.2
18
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