FT122Q-R FTDI, FT122Q-R Datasheet - Page 4

• Manufacturer Part Number: FT122Q-R
• Description: USB Interface IC USB CONTROLLER W/ PARALLEL BUS IC
• Manufacturer: FTDI

Specifications of FT122Q-R

• Rohs: yes
• Product: USB 2.0
• Interface Type: Parallel
• Operating Supply Voltage: 1.65 V to 3.6 V, 4 V to 5.5 V
• Operating Supply Current: 3.9 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-28
• Minimum Operating Temperature: - 40 C

Table of Contents
1
2
3
4
5
6
1.1
1.2
3.1
3.2
3.3
4.1
4.2
5.1
5.2
6.1
6.2
6.3
6.4
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
6.3.9
6.3.10
6.4.1
6.4.2
6.4.3
6.4.4
Typical Applications ...................................................................... 2
Block Diagrams ............................................................................ 3
Device Pin Out and Signal Description .......................................... 6
Function Description..................................................................... 9
Endpoint Buffer Management ..................................................... 11
Commands and Registers ........................................................... 14
Part Numbers...................................................................................... 2
USB Compliant .................................................................................... 2
TSSOP-28 Package Pin Out ................................................................. 6
QFN-28 Package Pin Out ..................................................................... 6
Pin Description ................................................................................... 7
Functional Block Descriptions ............................................................. 9
Interrupt Modes ................................................................................ 10
Endpoint Buffer Management in Default Mode .................................. 11
Endpoint Buffer Management in Enhanced Mode .............................. 12
Command Summary .......................................................................... 14
Initialization Commands ................................................................... 19
Data Flow Commands ....................................................................... 23
General Commands ........................................................................... 28
Set Address Enable .................................................................................................... 19
Set Endpoint Enable ................................................................................................... 19
Set Mode .................................................................................................................. 19
Set DMA ................................................................................................................... 21
Set Endpoint Configuration (for Enhanced Mode) ........................................................... 22
Read Interrupt Register .............................................................................................. 23
Select Endpoint ......................................................................................................... 25
Read Last Transaction Status ...................................................................................... 25
Read Endpoint Status ................................................................................................. 26
Read Buffer ............................................................................................................... 27
Write Buffer .............................................................................................................. 27
Clear Buffer .............................................................................................................. 27
Validate Buffer .......................................................................................................... 28
Set Endpoint Status ................................................................................................... 28
Read Current Frame Number ....................................................................................... 29
Send Resume ............................................................................................................ 29
Set Buffer Interrupt Mode ........................................................................................... 29
Read Vendor ID ......................................................................................................... 30
Acknowledge Setup ................................................................................................ 28
Copyright © 2012 Future Technology Devices International Limited
FT122 ENHANCED USB DEVICE CONTROLLER WITH PARALLEL
BUS
Document No.: FT_000647
Clearance No.: FTDI#
IC
Datasheet Version 1.0
313
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