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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PC215E
5.3.1 Programmable Peripheral Interface PPI-X Data Register Port A
This eight bit register writes to and reads from port A of the 82C55 Programmable Peripheral
Interface PPI-X. All input/output lines PA0 to PA7 of this device are available to the user on
connector SK1 as digital I/O.
Register
Offset
Write and/or
Read
Register
Width
Register
Title
Mnemonic
00
16
Write and Read 8 bits
82C55 Programmable Peripheral
Interface X Port A Data Register
PPI-X A
FUNCTION
The PPI-X Port A Data Register is used to write or read 8 bit data to port A of the 82C55
Programmable Peripheral Interface device PPI-X.
The PPI can be configured to operate in several modes. Further details may be found by
reference to the device manufacturer's 82C55 data sheets in the appendices.
The eight data bits of port A are data input, data output or bi-directional data I/O according to the
PPI mode:
Mode 0 Input or Output
Mode 1 Input or Output
Mode 2 Bi-Directional Input/output
The modes and programming of PPI operations are outlined in chapters 4 and 6 with the Digital
I/O connections shown in chapter 3.
BIT ASSIGNMENTS
The bit layout of the PPI-X port A data register is shown below.
01234567
PPI-X Port A Digital
I/O Data Bits
Digital I/O SK1
Pin Connections
SK1 3
SK1 61
SK1 22
SK1 41
SK1 2
SK1 60
SK1 21
SK1 40
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7