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参数资料
| 型号： | MC144144P |
| 厂商： | MOTOROLA INC |
| 元件分类： | 颜色信号转换 |
| 英文描述： | Digital Signal Processors 44-JLCC -55 to 125 |
| 中文描述： | COLOR SIGNAL DECODER, PDIP18 |
| 封装： | PLASTIC, DIP-18 |
| 文件页数： | 41/44页 |
| 文件大小： | 565K |
| 代理商： | MC144144P |
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MC144144
41
MOTOROLA
APPENDIX
DEMONSTRATION PROGRAMS
COMMUNICATING WITH THE MC144144
Communications with the MC144144 is accomplished us-
ing its serial communications interface. Through hardware
setup, this interface can be configured into either of two seri-
al protocols, I2C or SPI. The details of hardware setup have
been provided in the data sheet and will not be dealt with in
this appendix. It is assumed that the user is familiar with the
serial protocol requirements.
In the following descriptions
<ENTER>
means press the
Enter key and
*
signifies that everything following the aster-
isk in that line is a comment.
I2C OPERATION
The MC144144 is configurable as an I2C slave device with
the slave address 0010100. The accompanying C language
programs enable a PC to perform as the I2C master device of
an application. The PC communicates with the MC144144
through the parallel port. These programs are not intended
as examples of how to program the application but are only
provided as a means of illustrating the serial control process.
The three programs provided are titled IICO, SCRIPTI,
and XDSCAP. These programs have been compiled and run
satisfactorily with the MC144144 in a test board. Compiled
versions are available on disk.
IICO Program
This program will send one byte to the MC144144 without
checking the status of the READY bit. The program returns
the contents of the serial status (SS) register after the com-
mand has been entered. When the program is active the
screen will display:
IIC Command Byte >
The user may enter any valid one byte command such as
FB (Reset) or 00 (NOP) and then hit the ENTER key. The
screen will then display the byte entered and the SS register
contents as follows:
IIC Byte = 00
IIC Status = 83h
The illustration above shows the NOP command was en-
tered. The SS register contents, 83h, indicates that the RDY,
FLD, and LOCK bits are “ones” indicating that the serial port
is ready for further input, that the input video signal was in
field 1 at the time the status was read, and that the part is
operating in video lock mode.
The IICO program is exited by entering a Control C (^C)
character.
For example, entering the following single byte commands
would:
FB,FC,00
* Resets the part.
00
* Clear the reset.
17
* Set the part to CC1 display
mode, decoder ON.
23
* Change to the XDS Graze
display mode, 16Sec Timer ON.
17
* Return to the CC1 display
mode, decoder ON.
The commands that control most of the display capability
of the MC144144 are all one byte commands which can be
entered using the IICO program. These commands are tabu-
lated below for convenience.
General Commands
Command
NOP
Reset
Byte
00
FB,FC,00
Caption/Text Display Commands
CMD
Byte
17
15
1F
1D
13
11
1B
19
Data Channel
and DEC ON
CC1
CC2
CC3
CC4
T1
T2
T3
T4
CMD
Byte
16
14
1E
1C
12
10
1A
18
Data Channel
and DEC OFF
CC1
CC2
CC3
CC4
T1
T2
T3
T4
XDS and Miscellaneous Display Mode Commands
CMD
Byte
23
27
21
25
20
24
*Does not effect the display mode currently in
operation.
XDS
Disp
XDSG
XDSG
XDSF
XDSF
*
*
16 Sec
Timer
ON
OFF
ON
OFF
ON
OFF
SCRIPTI Program
This program is designed to send any number of one or
two byte commands to the MC144144. The list of commands
to be executed are contained in script files that have the ex-
tension .SER. Examples of such files will be presented in the
following paragraphs. SCRIPTI can be used to control the
display modes in the same manner as the IICO program ex-
cept that the one byte command to be sent must be in a
Script file. For example a file called CC1.SER would contain
the one byte command:
{17}
* send CC1, decoder ON
The program is invoked by typing:
SI File_name <ENTER>
* File_name without
the .SER extension
The screen will display:
EEG CCD2 Serial Interface Script Player
Version x.xx
Slave Address is 28h
Script File Done
The responding slave address is reported to the screen.
When all the commands in the file have been successfully
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