Remote-processing RPC-210 Manual de usuario descargar pdf (Pagina 54)

ACCESSING I/O BASIC SECTION 13

Page 13-1

INTRODUCTION

ACCESSING I/O SECTION 13

I/O on the RPC-210 is defined here as devices that are

not memory. These include the keypad, real time clock,

counter, an d expansion p ort.

I/O is accessed using the LINEB command and function.

A = LINEB(ADDRESS) Read

LINEB,ADDRESS,data Write

Use the following table as a quick guide for all I/O

addresses.

Address Type/function

0A000H Expansion port select

0A100H Real time clock

0A200H Digital I/O (82C55) at J3

0A300H COM1 select, RS-485 control, keypad

column select, extra output

0A400H Keypad row input, extra inputs

0A500H Extra pulse output

0A600H Counter access & control

0A700H Counter latch reset

Most addresses are explained in relevant application

program s. Ones not explained elsewher e are done so

below.

Extra pulse output

The extra pulse output at J7-9 may be used w hen a fast

pulse (0. 5 micro-second w idth) is needed. Normally this

pulse is high. Execution is fastest using the LINEB

command.

LINEB 0A500H,0

USING J7 FOR I/O

J7 is a potpourri of signals. Signals available at J7 are

discussed under relevant sections of this manual. T he

table below describes the signals and which section

further information on them can be found.

J7 Pin

Description Information

in section

1 Real time clock interrupt 7

2 Digital output/SPI chip

select.

4 & 6

3 Interrupt 0 9

4 RTC square wave output 7

5 COM 1 interrupt 4

6 Digital output 6

7 Ground

8 + 5V power

9 Pulse out 13

10 Digital output 6

11 Ground

12 RS-232 shut down 4

13 + 5V power

14 SPI data input 4

15 Ground

16 SPI data output 4

17 Auto run 3

18 SPI clock output 4

19 Digital input 6

20 Control to wake up board

from power down

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 60

Comentarios a estos manuales

Sin comentarios

Remote-processing RPC-210 Manual de usuario Pagina 54

Comentarios a estos manuales

Relacionado con productos y manuales para Ordenadores Remote-processing RPC-210