FT221XS-U FTDI, FT221XS-U Datasheet - Page 45

• Manufacturer Part Number: FT221XS-U
• Description: USB Interface IC USB to 8 bit SPI / FT1248 IC SSOP-20
• Manufacturer: FTDI

Specifications of FT221XS-U

• Rohs: yes
• Tradename: X-Chip

FT221X USB 8-BIT SPI/FT1248 IC Datasheet
Version 1.2
Document No.: FT_000630 Clearance No.: FTDI# 263
Appendix B - List of Figures and Tables
List of Figures
Figure 2.1 FT221X Block Diagram ................................................................................................... 4
Figure 3.1 QFN Schematic Symbol .................................................................................................. 7
Figure 3.2 SSOP Schematic Symbol ................................................................................................ 9
Figure 5.1: FT1248 Basic Waveform Protocol. ................................................................................. 14
Figure 5.2: FT1248 Command Structure ........................................................................................ 15
Figure 5.3: FT1248 Clock Format CPHA = 1 ................................................................................... 17
Figure 5.4: FT1248 Clock Format CPHA = 1 ................................................................................... 18
Figure 7.1 Bus Powered Configuration ........................................................................................... 26
Figure 7.2 Self Powered Configuration ........................................................................................... 27
Figure 7.3 Bus Powered with Power Switching Configuration ............................................................ 28
Figure 7.4 USB Battery Charging Detection .................................................................................... 29
Figure 8.1 Application Example showing USB to FT1248 host ........................................................... 30
Figure 8.2 FT1248 8- bit write timing diagram ................................................................................ 31
Figure 8.3 FT1248 8- bit read timing diagram ................................................................................ 32
Figure 9.1: Simplified memory map for the FT-X ............................................................................ 35
Figure 10.1 SSOP-20 Package Dimensions ..................................................................................... 38
Figure 10.2 QFN-20 Package Markings .......................................................................................... 39
Figure 10.3 QFN-20 Package Dimensions ....................................................................................... 40
Figure 10.4 QFN-20 Package Markings .......................................................................................... 41
Figure 10.5 FT221X Solder Reflow Profile ....................................................................................... 42
List of Tables
Table 3.1 Power and Ground .......................................................................................................... 7
Table 3.2 Common Function pins .................................................................................................... 8
Table 3.3 FT1248 Interface and CBUS Group (see note 1).................................................................. 8
Table 3.4 Power and Ground .......................................................................................................... 9
Table 3.5 Common Function pins .................................................................................................... 9
Table 3.6 FT1248 Interface and CBUS Group (see note 1)................................................................ 10
Table 3.7 CBUS Configuration Control ........................................................................................... 11
Table 5.1: FT1248 Commands ...................................................................................................... 16
Table 5.2: CPOL & CPHA Mode Numbers ........................................................................................ 16
Table 5.3: 1V8 VCCIO timings ...................................................................................................... 18
Table 5.4: 2V5 VCCIO timings ...................................................................................................... 19
Table 5.5: 3V3 VCCIO timings ...................................................................................................... 19
Table 6.1 Absolute Maximum Ratings ............................................................................................ 20
Table 6.2 ESD and Latch-Up Specifications .................................................................................... 20
Table 6.3 Operating Voltage and Current ....................................................................................... 21
Table 6.4 I/O Pin Characteristics VCCIO = +3.3V (except USB PHY pins) ........................................... 22
Table 6.5 I/O Pin Characteristics VCCIO = +2.5V (except USB PHY pins) ........................................... 23
Table 6.6 I/O Pin Characteristics VCCIO = +1.8V (except USB PHY pins) ........................................... 24
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