Copyright © 2014 Future Technology Devices International Limited

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Document No.: FT_000648

FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC

Datasheet Version 1.2

Clearance No.: FTDI#

312

Table 6.8 Endpoint Configuration Register...................................................................................... 24

Table 6.9 Interrupt Register Byte 1 ............................................................................................... 25

Table 6.10 Interrupt Register Byte 2 ............................................................................................. 25

Table 6.11 Interrupt Register Byte 3 (for Enhanced Mode) ............................................................... 26

Table 6.12 Interrupt Register Byte 4 (for Enhanced Mode) ............................................................... 26

Table 6.13 Endpoint Status Register.............................................................................................. 27

Table 6.14 Endpoint Last Transaction Status Register...................................................................... 27

Table 6.15 Transaction error code................................................................................................. 28

Table 6.16 Endpoint Buffer Status Register .................................................................................... 29

Table 6.17 Endpoint Control Register ............................................................................................ 30

Table 6.18 Frame Number LSB Register......................................................................................... 31

Table 6.19 Frame Number MSB Register........................................................................................ 31

Table 6.20 IO Pad Drive Strength Register ..................................................................................... 32

Table 8.1 Absolute Maximum Ratings ............................................................................................ 34

Table 8.2 Operating Voltage and Current ....................................................................................... 35

Table 8.3 digital I/O Pin Characteristics (VCCIO=+3.3V).................................................................. 35

Table 8.4 digital I/O Pin Characteristics (VCCIO=+2.5V).................................................................. 35

Table 8.5 digital I/O Pin Characteristics (VCCIO=+1.8V).................................................................. 36

Table 8.6 USB I/O Pin (DP, DM) Characteristics .............................................................................. 36

Table 8.7 SPI slave timing ........................................................................................................... 37

Table 9.1 FT121Q Bottom Pad Assignments ................................................................................... 40

Table 9.2 Reflow Profile Parameter Values ..................................................................................... 42