Instruction manual
Table Of Contents
- INTRODUCTION
- GETTING STARTED
- MAKING THE CONNECTIONS
- USING THE PC215E
- STRUCTURE AND ASSIGNMENTS OF THE REGISTERS
- Register Assignments
- Register Groups
- The Register Details
- Programmable Peripheral Interface PPI-X Data Register Port A
- Programmable Peripheral Interface PPI-X Data Register Port B
- Programmable Peripheral Interface PPI-X Data Register Port C
- Programmable Peripheral Interface PPI-X Command Register
- Programmable Peripheral Interface PPI-Y Data Register Port A
- Programmable Peripheral Interface PPI-Y Data Register Port B
- Programmable Peripheral Interface PPI-Y Data Register Port C
- Programmable Peripheral Interface PPI-Y Command Register
- Z1 Counter 0 Data Register
- Z1 Counter 1 Data Register
- Z1 Counter 2 Data Register
- Counter/Timer Z1 Control Register
- Z1 Counter/Timer Status Register
- Z2 Counter 0 Data Register
- Z2 Counter 1 Data Register
- Z2 Counter 2 Data Register
- Counter/Timer Z2 Control Register
- Z2 Counter/Timer Status Register
- Group Z Clock Connection Register
- Group Z Gate Connection Register
- Interrupt Source Selection Register
- Interrupt Status Register
- PROGRAMMING THE PC215E
- Copyright
- Files installed from the Distribution Diskette
- Windows DLL and Examples
- DOS 'C' Library and Examples
- Using the Dynamic Link Library
- Windows and DOS Library Functions
- Initialisation Functions
- Interrupt Control Functions
- Data Buffer Functions
- Timer/Counter Functions
- Differential Counter Functions
- Frequency Generation Functions
- Millisecond Stopwatch Functions
- Frequency Input and Output Functions
- Digitally- and Voltage-Controlled Oscillator Functions
- Digital Input/Output Functions
- Switch Scanner Matrix Functions
- Bi-Directional Data Bus Functions
- PC215E Library Error Codes
- PC215E Interface Guide For LABTECH NOTEBOOK
- Guide to User Programming
- Signal Centre
- CONTENTS
- DECLARATION OF CONFORMITY
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113
PC215E
Interface: A shared boundary defined by common physical interconnection characteristics, signal characteristics
and meanings of interchanged signals.
Interrupt: A computer signal indicating that the CPU should suspend its current task to service a designated
activity.
I/O Address: A method that allows the CPU to distinguish between different boards and I/O functions in a system.
See Base Address.
Latch: A device to store the state of a digital signal until it is changed by another external command signal. The
action of storing this signal.
Least Significant Bit (LSB): In a system in which a numerical magnitude is represented by a series of digits, the
least significant bit (binary digit
) is the digit that carries the smallest value or weight.
Linearity: Compliance with a straight line law between the input and output of a device.
Load Voltage Sensing: A technique for maintaining accuracy of an analog signal at the load by monitoring the
voltage and compensating for errors due to cable and source resistance.
Micro Channel Architecture (MCA): A unique architecture defined by IBM™ to provide a standard input/output
bus for Personal System computers.
Monotonic: A DAC is said to be monotonic if the output increases as the digital input increases, with the result
that the output is always a single valued function of the input.
Most Significant Bit (MSB): In a system in which a numerical magnitude is represented by a series of digits, the
most significant bit (binary digit
) is the digit that carries the greatest value or weight.
Multiplexer: A multiple way analog switch q.v., where a single path through the switch is selected by the value of
a digital control word.
Multiplying DAC: A Multiplying DAC (or Digital-Analog Multiplier) operates with varying or AC reference signals.
The output of a Multiplying DAC is proportional to the product of the analog ‘reference’ signal and the fractional
equivalent of the digital input number.
Noise: An undesirable electrical interference to a signal.
Normal Mode Signal: Aka Series mode signal. In a differential analog measuring system, the normal mode
signal is the required signal and is the difference between the voltages on the two input signal lines with respect to
ground level of the measuring system.
Offset: (a) A fixed, known voltage added to a signal.
(b) The location of a register above the base address.
Pascal: A high level programming language originally developed as a tool for teaching the concepts of structured
programming. It has evolved into a powerful general-purpose language popular for writing scientific and business
programs. Borland Turbo Pascal is a dialect of Pascal.
Passive Filter: A filter circuit using only resistors, capacitors and inductors.
PC: Personal Computer (Also printed circuit - see PCB)
PCB: Printed Circuit Board
Port: An interface on a computer capable of communication with another device.
Range: Refers to the maximum allowable full-scale input or output signal for a specified performance.
Real Time: Data acted upon immediately instead of being accumulated and processed at a later time.
Reed Relay: An electro-mechanical relay where the contacts are enclosed in a hermetically sealed glass tube
which is filled with an inert gas.
Repeatability: The ability of a measuring system to give the same output or reading under repeated identical
conditions.
Resolution: A binary converter is said to have a resolution of n-bits when it is able to relate 2
n
distinct analog
values to the set of n-bit binary words.
Rollover: Symmetry of the positive and negative values in a bipolar conversion system.
RTD (Resistive Temperature Device): An electrical circuit element characterised by a defined coefficient of
resistivity.
Sample/Hold: A circuit which acquires an analog voltage and stores it for a period of time.
Sensor: Device that responds to a physical stimulus (heat, light, sound, pressure, motion etc.) producing a
corresponding electrical output.
Settling Time: The time taken for the signal appearing at the output of a device to settle to a new value caused
by a change of input signal.
Signal to Noise Ratio: Ratio of signal level to noise in a circuit. Normally expressed in decibels.
Simultaneous Sample/Hold: A data acquisition system in which several sample/hold circuits are used to
simultaneously sample a number of analog channels and hold these values for sequential conversion. One
sample/hold circuit per analog channel is required.