BIOPAC® Systems, Inc. Logo

USB-TTL Interface

Request More Info
USB-TTL interface
Part #: USB-TTL

USB-TTL Interface is a USB module which provides 16 TTL I/O lines that can have up to millisecond accuracy. It may be used to replace parallel port interfaces, which are no longer common on computers. This interface may be used for custom programming or for sending/receiving information from stimulus presentation programs. Compatible with all Psychology experiment generators, e.g., MATLAB, E-Prime, SuperLab, Presentation, Inquisit, DMDX, ERTS, DirectRT, PsyScope, PsychoPy, OpenSesame, etc.

USB TTL Module | Millisecond accurate* event marking across up to 16 I/O lines

Gender Changer | Use to connect the USB-TTL to an Isolated Digital Input module for MP160/150 System (STP100D-C/STP100C-C), directly to I/O Port on MP36/36R, or other 25-pin male device

USB Lead | Use to connect the USB-TTL Module to the Host PC

Setup may require a CBL110C—see ‘Hardware Connections‘ in Details below.

See More...

TTL I/O lines
View Spec PDF

Are You Looking for These?

Part #: USB-TTL

Subcategories: Computer Interface - , Stimulation - , Output Adapter - , Stimulus Presentation - , Computer Interface - , Stimulus Presentation -

Details

Compatibility


Key features

  • 16 Digital +5 V TTL Lines
    • 8 TTL Input
    • 8 TTL Output
  • TTL Input Lines configured as an 8 bit port
  • TTL Output Lines configured as an 8 bit port
  • Change detection on TTL Input lines
  • TTL Input to 2 hex bytes conversion representing 255 possible states
  • Event marking: 2 hex bytes to TTL Output across 8 bit port representing 255 possible states
  • TTL Output lines automatically latch once set
  • Works out of the box with PCs/Macs/Linux—fully plug in & play
  • Appears as a Virtual Com Port (VCP)
  • Compatible with all Psychology experiment generators, e.g., E-Prime, SuperLab, Presentation, Inquisit, DMDX, ERTS, DirectRT, PsyScope, PsychoPy, OpenSesame, etc.
  • Works with any software that can access a standard serial port
  • Comes complete with timing validation software which checks round trip timing on your PC
  • Fully documented API complete with examples
  • Small and unobtrusive—Dimensions (WxHxD): 67.1 mm x 28.2 mm x 67.1 mm
  • LED indicators for Input (green) and Output (red)
  • Full-speed USB 2.0 (compatible with USB 3.0)
  • Scans for TTL I/O changes 109,000 times each second
  • Millisecond accurate TTL event marking*

*Accuracy may be limited by PC and experiment generation software selected for stimulus presentation.


Utilizes The Black Box ToolKit technology.

Hardware Connections

how to connect IO cable to MP36/36R

Figure 1: Back of MP36 showing location of I/O Port

MP36, MP36, MP35R

Digital signals may be brought in and out of MP36 (or older MP35) or MP36R through the I/O Port on the back of the device.

To interface a parallel port or emulator, an STP35B (or older STP35A) must be connected to the I/O Port.

IMPORTANT!  These are NOT equivalent to straight-through cables. An off-the-shelf DB25 cable will not make the proper connections.

MP46 I/O cable interface

Figure 2: MP46 and BN-SMART-IOCBL

MP46 or Smart Center

MP46 and Smart Center can connect to a parallel port or emulator through BN-SMART-IOCBL.

The connection between BN-SMART-IOCBL and parallel port may be through a CBL110C or any other straight-through cable with appropriately gendered DB-25 connectors at the ends.

STP100C interface port for USB-TTL

Figure 3: Location of printer port on Isolated Digital Interface (shown on STP100C-C with MP150, same on STP100D-C with MP160)

MP160 or MP150

Digital signals may be brought into an MP160 (or older MP150) System via an STP100D-C isolated digital interface module (or older STP100C-C).

  • The connection should be made through a CBL110C or equivalent. The CBL110C is a straight-through cable and is included with STP100D-C..

Support

Application Notes

Downloads/Resources

Knowledge Base

Recommended Items

Spotlight On
BIOPAC ECG

ECG Smart Amplifier

Easily record great ECG data and derived signals for heart rate, RR interval, and R-wave amplitude. BIOPAC’s new Smart Amplifiers are designed for great data. Smart Amplifiers improve performance by amplifying the physiological signal close to the subject, which allows a high-level voltage connection to the data acquisition system and reduces noise artifact. AcqKnowledge Smart […]

View All
Latest News

New Citations | BIOPAC in HRV Analysis Research

BIOPAC provides researchers with a complete range of tools to gather data on heart rate variability (HRV). The following studies demonstrate just some of the ways in which HRV research benefits from the implementation of BIOPAC hardware and software solutions. PTSD and HRV Post-traumatic stress disorder (PTSD) has been associated with dysfunction of the autonomic […]

Electrocardiography Guide Now Available

BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]

Read All
Request a Demonstration
Request a Demonstration