Measurement Computing

(508) 946-5100

1

info@mccdaq.com

mccdaq.com

USB-DIO32HS

Measurement Computing

(508) 946-5100

1

info@mccdaq.com

mccdaq.com

High-Speed Digital I/O

Digital I/O

The 32 DIO bits are available as two

16-bit ports that are bit-configurable for

input or output. Each port is configured

independently, so both software polling

and hardware scanning operations can

be performed at the same time.

When performing software polling, the

port can contain any combination of

input or output bits. When performing

hardware-paced output scans, all bits in

the port must be set for output. For input

scans, however, the current state of any

bits in the port that are configured for

output are read.

Digital Output Scanning

Either digital port can output a 16-bit

digital pattern. The pattern is updated

at a rate up to 8 MS/s, and clocked using

the output scan clock. Use both ports to

output a 32-bit digital pattern. Data from

one port is read and stored in the FIFO

buffer until the second port is read. Both

ports are output simultaneously on the

rising edge of the next pacer clock signal.

Pull-Up/Down Configuration

The DIO bits can be pulled up to 5 V or

down to 0 V through 47 kΩ resistors via

onboard jumpers.

Clock I/O

Users can pace input scanning operations

with the onboard input scan clock or

with an external signal. The input clock

frequency is 8 MHz, maximum.

A duty cycle of 50% is maintained when

the internal input clock paces operations.

When using an external clock, the signal

is output immediately after the external

clock input is received.

Data Transfer

The USB-DIO32HS uses a delay between

the output scan clock and the data transfer

pin, which allows an external device that

is receiving the data to know that the

data is stable at that point, and ensures

a coherent data transfer between devices.

USB-DIO32HS devices provide 32 bits of high-speed digital I/O, input/output scan rates up to

8 MS/s, and simultaneous hardware and software scanning. The USB-DIO32HS-OEM (above

left) has a board-only form factor and header connectors. The USB-DIO32HS (above right) is

a cased version with screw terminals.

Triggering

Digital and pattern triggering are sup-

ported.

The TRIG pin is used for external TTL-level

triggering, and can be used to trigger input

or output scans. Trigger latency is less

than 1 µs. The trigger mode is software-

selectable for edge or level sensitive, and

high or low logic.

Either digital port can be used for pattern

triggering. A scan is triggered when a

specified pattern is detected. Specific bits

can be masked or ignored. Trigger latency

is 1 scan clock period. You can input or

output a digital pattern under the timing

control of a clock signal.

USB-DIO32HS-OEM

The USB-DIO32HS-OEM has a board-only

form factor with header connectors for

OEM and embedded applications (no

case, CD, or USB cable included). The

device can be further customized to meet

customer needs.

Features

• 32 bits of bidirectional TTL

digital I/O

• Pattern detection and

generation

• Input scan rate up to 8 MS/s

• Update rate up to 8 MS/s

• Independent input and output

scan clocks

• 24 mA source, 10 mA sink

output current

• External trigger and clock

inputs

• Available with enclosure and

screw terminals, or as a board-

only OEM version with header

connectors (no case, CD, or

USB cable included)

Supported Operating Systems •

Windows®

11/10/8/7/Vista®/

XP, 32/64-bit

• Linux®

• Android™

Overview

The USB-DIO32HS provides 32 bits of high-speed digital I/O, and features

independent input and output scan clocks, hardware and software triggering, and

pattern detection/generation.