Remote Processing RPC-210 - Manual (Page 54)

ACCESSING I/O BASIC SECTION 13
Page 13-1
INTRODUCTION
A C C E S SI N G I/ O SECT ION 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 com mand and function.
A = LINEB(ADDRESS) Read
LINEB,ADDRESS,data Write
U s e t he fo ll ow i ng ta b le a s a q ui ck g ui de fo r al l I / O
addresses.
Address Type/func tion
0A000H Expansion port select
0A100H Real time clock
0A200H Digital I/O (82C55) at J3
0A300H COM 1 select, RS-485 control, keypad
column select, extra output
0A400H Keypad r ow input, extra inpu ts
0A500H Extra pulse output
0A600H Counter access & control
0A700H Counter latch reset
Most addresses are explained in relevant application
program s. O nes not explained elsewher e are done so
below.
Extra pulse output
The extra p ulse output at J7-9 may be used w hen a fast
pulse (0. 5 micr o-second w idth) is needed. Nor mally 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 outpu t/SP I chip
select. 4 & 6
3 Interr upt 0 9
4 RTC squar e 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 4