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Discription:
The WiZ232-A is a specialized integrated circuit which features a fast serial communication interface port and 29 input/output lines available in four general purpose ports. This product provides a means of communicating with a computer or terminal through the RS232 (serial communication) port. It is capable of operating at baud rates from 9,600 to 230,400, making it suitable for a wide variety of uses. Typical applications in which the WiZ232 can be used include any circuitry requiring computer control and/or data acquisition, robotics (controlling DC, stepper and servo motors), environmental control and instrumentation.
Not only does the WiZ232 provide a solid, dependable serial communications interface but it also offers a number of embedded functions which greatly expand the number of applications for which it can be used.
Foremost among these functions is the embedded logic for stepper motor control. The WiZ232 provides a stepper motor control port with all the necessary signals to control external drivers with features including half step and full step (biphasic and monophasic) operation, acceleration and deceleration from 0 to 255 steps/second2, a 24 bit position register, and stepping rates of 16 to 8,500 steps/second.
Other functions include the measurement of period, resistance and capacitance, and the generation of a PWM signal. The WiZ232 also features an Serial Peripheral Interface (SPI) port which can be used for connecting a number of synchronous devices such as: serial analog to digital converters, digital to analog converters, shift registers (useful for generating complex wave forms), and E2PROM.
The capability to read a serial analog to digital converter (ADC) through the SPI port provides a real time data acquisition feature. With the WiZ232, samples can be taken from an analog signal at speeds from 20 to 2,500 samples per second. This allows samples to be obtained in real time and can be used for applications such as spectrum analysis using FFT and digital filtering of noise.
The features and functions of the WiZ232 are accessible through the use of an embedded set of commands. These commands allow control of this product from both commercial communication programs such as PROCOMM and Telix as well as custom programs written in a variety of popular programming language such as Visual Basic, Q Basic, C/C++, Visual C++, Pascal, Delphi etc.
The WiZ232-A is available in a 40 pin DIP or 44 pin PLCC package.
Features:
Lines
|
24 digital I/O (TTL compatible) |
Baud rate
|
Software selectable baud rate |
Interface
|
High speed serial interface |
Peripheral Interface
|
Serial peripheral interface |
Interrupt
|
Interrupt pin (IRQL) |
Sampling
|
Real time sampling |
Ease of sampling
|
Gate pulse to IRQL can be used to start sampling |
Intelligence
|
On-board intelligence |
Pre-programming functions
include
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- PWM/Pulse Width Generator |
| - Measurement of resistance, capacitance & period |
| - Stepper motor control |
Ease of connection to lines
|
Phone jacks (RJ11/12) and terminal strip pads
on board for easy hook up to a variety of link wire sizes. |
Line protection
|
All power lines are reverse polarity protected
by diodes in series. |
PWM
|
Two independent 10-10,000 Hz, 0-100% duty cycle
Pulse Width Modulation channels. |
Interrupt lines
|
High and Low interrupt lines (edge sensitive)
available when the station is active. |
Baud rate
|
Baud rate configurable, via software, from 300
baud up to 115200 baud. |
Resistance, conductance & capacitance reading
|
Eight channels for reading relative resistance,
fluid conductance or capacitance. |
Stepper motors
|
Four stepper motor ports with all the necessary
logic embedded to facilitate monophasic, biphasic and half-step
modes. |
Repeat ease
|
Single "Again" command allows repeat of previous
command at a fast rate. |
Easy access to active configuration
|
A configurable status feature which sends the
active configuration of any parallel port, stepper motor port,
or the PWM back to the terminal. |
Analog-to-digital channels
|
Eleven channel analog-to-digital converter with
either 8, 10 or 12 bit resolution is available. |
Hardware & software
|
Associated hardware and software development
is easy and cost effective. |
Ease of access to functions
|
All functions can be called by means of simple
ASCII commands. |
Low cost per station
due to
|
Intrinsic low cost of the units. |
| No need for "on-board" programming thus allowing
for very low costs associated with software development. |
| The set of functions embedded in the ITC232-A
IC drastically reduces associated hardware. As an example, an
excellent precision liquid level measurement system based on
conductivity can be implemented with the addition of only two
4066 IC's, an inverter (4069 )or transistor and a capacitor.
The use of the ITC232-A also brings in the well known simplicity
advantage this chip offers. |
Cable jumpers
|
Cable selection jumpers |
Mnemonic command set including
|
- Library: 32 bit Dynamic Link Library (DLL) |
| - Reading: Command for reading serial A/DC |
| - Ease of repetition: 'Again' command |
Technical Specifications:
| Serial Interface |
High speed serial port interface from 9600 to 230400 baud. |
| Serial Port Connection |
Three wire connection (Rx,Tx,GND) |
Digital Lines
|
29 digital I/O arranged into three 8 bit general purpose ports (PA, PB, PC)
and a 5 bit I/O port (PD). Each pin individually configurable as input or output. SPI port
(PS) also available. |
A/D Sampling rate
|
20 to 2,500 samples/sec. |
PWM
|
Pulse rate from 15 Hz to 15 kHz with variable duty cycle. 24 bit output
pulse counter up to 16 million. |
Resistance
|
500 Ohms to 10 MOhms |
Capacitance
|
100pF to 10µF |
Period
|
Measurement of period from 65µS to 100mS. Minimum signal frequency 10 Hz,
maximum 15 KHz. On-board pulse clipper allows use with AC signals from 500 mV rms to 5 V
rms. |
Stepper Control
|
Step speeds from 16 steps/sec to 8,500 steps/sec. Linear acceleration and
deceleration between 0 to 255 steps/sec2. 24 bit position/stepping register. 4 output signals
(pulse, direction, pause, trigger) for full (biphasic and monophasic) and half step modes.
Steps to go feature between 1 to 8 million steps |
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Rating
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Value
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Units
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| Supply Voltage |
-0.3 to + 7.0 |
V |
| Input Voltage |
VSS-0.3 to VDD+0.3 |
V |
| Current drain per pin |
25 |
mA |
| Storage temperature range |
-65 to +150 |
Deg. Celsius |
| Operating temperature range |
0 to +70 |
Deg. Celsius |
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