Introduction of XL2000 experimental
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Chapter
VII
Frequently Asked Questions
If
you are a beginner, then I strongly recommend that you carefully read
the following. When you have something wrong in the experiment, you
can get back here anytime to have a review.
 1
Why my XL2000 programming package is always displaying:
the selected serial port does no exist, please choose another
one?
a. Check if power is on, and power indicator light is on.
b. Check if
programming/simulation switch button is set at the correct state. The
button state must be on when do programming.
c. Check if any other software occupies serial port, such as
other programmer, debugger or keil uv2 simulation software. The same
serial port can only support one program at the same time, else
confliction exists.
d. Check if serial port selection is OK. You can open Control
Panel/System/Hardware property /serial ports and see the port number.
Make sure the selection is consistent with the allocation number.
e. Check if the
USB drive is installed correctly. (Refer to Chapter III: USB
Installation Guide)
f. Check if
USB/RS232 jumper is OK, if you use USB, then JP13/JP14 must set to
USB.
2.
Why XL2000 does not act after prompted with success programming and
target board is running?
a. Check if the chip on the board socket is 89S51. Other chip
does not work.
b. Check if the serial port is connected correctly with pin
lines. The result can only be displayed on some experimental resources
such as LCD/LED. This output resources should be connected to CPU
output port by pin lines correctly.
c. Check if the
system is reset well. You can have a try to press down the RESET
button.
3.
In simulation mode, why the board cannot connect to my PC?
a. Check if the simulation module in the package is locked well
on the socket.
b. Check if keil uv2 software version is OK. Strongly suggest
using the keil uv2 software in the package shipped to you. ( Some
other versions keil is not compatible.) Attention: the keil software
must be installed under the root of c disk, which means c:\. Other
directory does not work. (Refer to Chapter V, XL2000 simulating
operation guide). The file must be named ascii and placed under ascii
folder.
c. Check if the COM port configuration is OK. Because
simulation and programming are both using COM ports, when doing
simulation, other software that is using COM port must be closed.
d. Check if programming /simulation button state is OK. ( down
button means simulation)
4.
Why the simulation head works well with on board resources but does
not work with external board?
a. Check if the external board is reset well, the oscillator is
OK and the programming functionality is OK of the board?
b. Check if the simulation head is plugged correctly. The first
PIN(red) must be connected to the first PIN of the CPU. You can verify
it with a multi-meter.
5.
Why some program works under programming mode, but not in simulation
mode?
In the simulation mode, some system resources are occupied to
support the simulation functionality. The situation is not 100% same
as the real programming running environment. If you have doubts about
the simulation result, then please switch to ISP programming mode.
Under circumstances, I suggest the use of
programming–experiment mode.
6.
How to do if I want to use 2051 single chip?
Compared with 89S51 chip, 2051 is only lack of p0 and p2 port.
The programming model and the instructions are both the same. So you
can use 2051 chip as your wish only need to pay attention to avoiding
the use of p0 and p2 port. If you must use 2051, then we can offer you
other programmers with a discount.
7.
Is 89S52 totally same as 89C51?
89S52 is an upgrade version of 89C51 and their instruction set
is completely compatible, and can substitute for each other. Compared
with 89C51, 89S52 has the advantage of lower price and longer life
expectancy. At the same time, 89S52 is configured with the watchdog
and ISP downloading functionality.
 Chapter VIII: System
configuration and post-sale service guide
Standard
configuration: (this configuration changes according to different
situations)
 XL2000: an integrated single-chip simulation/programming
instrument (100% test OK, on-board configured with a piece of 89s52
and 12864 LCD)
one
backup 89s52 chip one
simulation module
one
serial communication cable
one
USB cable
ultra-thin infrared remote controller HT6221
40PIN
simulation head/cap
10PIN
ISP downloading head/cap
15
pieces of connecting pin line
one
software CD (drivers, software tools, example sources, single-chip
document and tutorial.)
Warranty: In
the absence of self-repair demolition cases, the products sold from
the three months from the date OZ free of charge for three years free
warranty. (Experimental chip, with the exception of LCD) with the
customer directly to the company or agent to replace.
Technical
support: Any
user of this product, go to the latest forum
http://www.8951.com/bbs/ and register an account for getting
more help and more sources! In the forum, at any time, dozens of
friends are ready to share with you the joy of learning! For
more information and source, click www.8951.com
www.51c51.com Technical
Forum: http://www.8951.com/bbs/
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users, please fill out the following information carefully, after the
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Xuelin Electronics Co., Ltd, China. All rights reserved September 3,
2008 Wednesday The third edition | 
