Remote-processing RPC-210 Manual de usuario Pagina 29
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DIGITAL LINES BASIC SECTION 6
Page 6-1
Figure 6-1 Digital Input - Output connectors
INTRODUCTION
DIGITAL LINES SECTION 6
Digital I/O lines ar e used to inter face with opto-module
racks, switches, low current LED’s, and other TTL
Digital I/O lines ar e used to inter face with opto-module
racks, switches, low current LED’s, and other TTL
devices. The RP C-210 has 37 of these lines. 24 go to 26
pin connector J3. The remaining lines go to J5 and J7.
Some of the lines may be used for multiple uses. These
uses include:
LCD display at J4 (shared with J3)
Keypad at J5. Inputs only at J7
Keypad column outputs 1-4 are dedicated to the keypad.
This is because keypad scanning automatic in RPBASIC-
52. However, keypad row inputs m ay be used fo r inputs
at J7.
J7-17 is used for autorun detect. When this line is low,
RPBASIC-52 automatically executes the first BASIC
program on power up, reset, or CALL 0 command.
Three RPBASIC-52 commands are used to access lines
at J3: LINE, LINEB, and LINE #. Two event-driven
commands, ON LIN E and ON C OUNT, monitor the
lines. Lines at J3 ar e configured for inputs and outputs
using the CONFIG LINE command. L ines at the other
ports are accessed u sing LI NE B.
RPBASIC-52 Programming Manual difference
The syntax for LINEB is slightly different than shown in
the RPBA SIC-52 m anual.
A = LIN EB(address) Read from I/O area
LINEB, address, data Write to I/O area
There is no i/o bank param eter as shown in the m anual.
The Programming Manual states that lines are checked
every 5 mSec for ON COUNT and ON LINE. Lines are
checked every 10 mSec on the RPC-210. Maximum
counting frequency is effectively 45 Hz. Lines must be
stable for 10 mSec or longer to ensure detection.
ELECTRICAL CHARACTERISTICS
Digital output ports sink and source a limited amount of
current. Each por t is different as shown in the table
below:
Ports Current @ condition
J3 20 mA sink @ 1V (low)
20 mA source @ 3.6V (high)
J5 & J7 10 mA sink @ 1V (low)
10 mA source @ 3.6V (high)
Digital inputs at J3 have 100K resistor pull ups. Inputs
at J5 and J7 have 10K pull ups. For a m ore noise
immunity, add a lower value pull up r esistor to the inp ut.
NOTE: The 82C55 inputs at port A are latched.
- TRADEMARKS 1
- NOTICE TO USER 1
- FCC NOTICE 1
- TABLE OF CONTENTS 2
- OVERVIEW SECTION 1 4
- SETUP AND OPERATION SECTION 2 10
- INTRODUCTION 14
- SAVING A PROGRAM 14
- HIDING A PROGRAM 15
- WARNING: 15
- AUTORUNNING 15
- LOADING A PROGRAM 15
- SAVING AND READING DATA 16
- ASSEMBLY LANGUAGE INTERFACE 16
- SETTING FLASH SIZE 17
- COMMANDS 17
- APPLICATION PROGRAMS 18
- DESCRIPTION 19
- COM0 SERIAL PORT 19
- COM1 SERIAL PORT 20
- USING RADIO MODEMS 23
- ACCESSING SERIAL BUFFERS 23
- ACCESSING COM0 AND COM1 23
- DISABLING CONTROL-C 23
- SPI PORT 24
- RS-232 PORT PIN OUT 25
- RS-422/485 PORT PIN OUT 25
- RAM BASIC SECTION 5 26
- DIGITAL LINES BASIC SECTION 6 29
- ADDRESSING 35
- PROGRAMMING NOTES 35
- SETTING DATE AND TIME 35
- BATTERY LIFE 35
- STABILITY AND TEMPERATURE 36
- IDLE AND POWER DOWN MODES 36
- SQUARE WAVE OUTPUT 37
- READING CLOCK SERIAL NUMBER 37
- PROGRAMMABLE INTERRUPTS 37
- COUNTER/ENCODER 38
- J11 CONNECTOR PIN OUT 38
- PULSE OUTPUTS 38
- USING INTERRUPT 0 39
- PULSE WIDTH & FREQUENCY 39
- MEASUREMENT 39
- EXTERNAL INTERRUPTS SECTION 9 41
- ANALOG I/O BASIC SECTION 10 43
- CONNECTING DISPLAYS 49
- WRITING TO THE DISPLAY 49
- USING “UNSUPPORTED” DISPLAYS 50
- DISPLAY PIN OUTS 50
- CONTRAST/ANGLE ADJUSTMENT 50
- DISPLAY CONNECTOR PIN OUT 51
- DEMONSTRATION PROGRAMS 51
- EXPANSION PORT 52
- EXTERNAL POWER 52
- LOW POWER MODES 53
- Expansion Port Pin Out 53
- USING J7 FOR I/O 54
- RESOURCES SECTION 14 55
- MECHANICAL 58
- SHOCK AND VIBRATION 58
- MOUNTING TO A MOTHER BOARD 59
- CONNECTOR POSITION 60
- BOARD DIMENSION 60
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