ADLINK Technology 72XX Series Manuel d'utilisateur Page 39
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- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Operation Theory 25
72XX Series
User’s Manual
4 Operation Theory
4.1 Digital I/O Ports
4.1.1 Introduction
The 7248/96 products can emulate one/two/four mode 0 configu-
ration of 8255 programmable peripheral interface (PPI) chips.
There are 24 DIO signals for every PPI.
4.1.2 8255 Mode 0
The basic functions of 8255 mode 0 are:
Two 8-bit I/O ports-port A (PA) and port B (PB)
Two nibble-wide (4-bit) ports C-PC upper and PC lower
Each port can be used as either input or output
Outputs are latched whereas inputs are buffered
16 different input/output configurations are available
4.1.3 Special Function of the DIO Signals
Two I/O signals (PC0 and PC3) of CN1 and CN2 can be used to
generate hardware interrupt. Refer to section 4.3 for details on the
interrupt control. In addition, the P1C4 signals can be used as
input signal of event counter.
- 72XX Series 1
- Table of Contents 3
- Table of Contents v 5
- List of Figures 7
- List of Tables 9
- 72XX Series 10
- User’s Manual 10
- Disclaimer 11
- Trademarks 11
- Getting Service 12
- 1 Introduction 15
- 1.1 Features 16
- 1.2 Applications 16
- 1.3 Specifications 17
- 1.4 Software Support 19
- 6 Introduction 20
- 2 Installation 21
- 2.2 Unpacking 22
- 2.3 PCB Layout 23
- 2.3.3 cPCI-7248 PCB Layout 24
- 2.3.4 cPCI-7249R PCB Layout 24
- Installation 11 25
- 2.4 Hardware Installation 26
- Installation 13 27
- 2.6 Connector Pin Assignment 28
- Installation 15 29
- 16 Installation 30
- Installation 17 31
- 18 Installation 32
- 2.7 Jumpers Description 33
- PCI-7296 35
- PCI-7248 35
- or DIN-24R 35
- TB-16P8R 36
- 3 Registers Format 37
- 3.2 I/O Address Map 38
- 4 Operation Theory 39
- 4.1.5 Control Word 41
- 4.1.6 Power On Configuration 42
- 4.1.7 Note for Output Data 42
- 4.1.8 Note for cPCI-7249R 42
- 4.2 Timer/Counter Operation 43
- 30 Operation Theory 44
- 4.3 Interrupt Multiplexing 45
- 32 Operation Theory 46
- 4.4 12V and 5V Power Supply 48
- 5 C/C++ Libraries 49
- 5.2 Programming Guide 50
- 5.3 _7248/96_Initial 51
- @ Argument 52
- @ Return Code 52
- 5.4 Digital Input 53
- 5.5 Digital Output 56
- 5.6 Configuration Port 57
- 5.7 Configuration Channel 59
- 5.8 Set Interrupt Control 61
- 5.9 Timer Start 63
- 5.10 Timer Read 64
- 5.11 Timer Stop 65
- 5.12 Cascaded Timer 66
- 5.13 Get IRQ Status 67
- 5.14 Clear IRQ 69
- 5.15 Software Reset 70
- @ Description 71
- @ Syntax 71
- 60 C/C++ Libraries 74
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