Rev. 1.2 (July 2007) 1 © DLP Design, Inc.
D
DL
LP
P-
-2
23
32
2P
PC
C
LEAD-FREE
MINIATURE USB - MICROCONTROLLER MODULE
PWREN VCCIO
4th Gen USB IC
VCC
USBDP TXD
USBDM
RXD
CBUS0
FTDI FT232R
USB Type 'B'
Mini Connector
to Host
Windows/Linux/
Mac PC PIC
18F2410
5V
24MHz
Clock
18-pin,
0.3-inch
Interface
Header
for I/Os
5V
MOSFET
Power
Switch
460,800
BAUD
Applications:
- Data Acquisition
- Industrial/Process
Control
- Process Monitoring
Features:
- 14 Channels: Digital I/O, Temperature, 8
Configurable for Analog In (0-5 Volts)
- PIC18F2410 Microcontroller
- USB Port Powered
- USB 1.1 and 2.0 Compatible Interface
- Small Footprint: 1.375 x 0.6 Inch PCB
- Standard 18-Pin 0.3-Inch DIP Interface
- Easy to Use with Single-Byte Commands; Can
Utilize a Simple Terminal Emulator to Control
All Functions
Rev. 1.2 (July 2007) 2 © DLP Design, Inc.
1.0 INTRODUCTION
The DLP-232PC Data Acquisition Module is a low-cost, easy-to-use data acquisition module for
measuring voltages, controlling and monitoring processes, and acquiring temperature data. Each of
the 14 available channels can be configured for digital I/O or temperature modes via single-byte
commands. Eight of the 14 channels can be configured to measure analog voltages in the range of
0-5 volts. All operational power is taken from the host PC via the USB port.
The mode of each I/O is automatically changed with each command sent. For example, if an I/O is
set to Digital Output – High and then the Digital Input Mode is selected, the I/O is first changed to
Input Mode and then the high/low state is read and returned to the host.
The programming interface (ICSP) is available for custom firmware development.
2.0 SPECIFICATIONS
The DLP-232PC is a 5-volt system that derives its power from the host USB port. Each channel has
the following capabilities:
Digital Output: Set high, or clear to low. (The actual high/low voltage depends upon sink/source
current.)
Digital Input: Read the high/low state.
Analog In: (Channels 1-8 only) read and return the voltage on each I/O pin using a 10-bit A/D
(0-5 volt range, accuracy based on 5-volt USB Host supply voltage).
Temperature: Measure temperature using a digital temperature sensor (purchased separately) in the
range of 67 to 257°F (-55 to 125°C).
3.0 ABSOLUTE MAXIMUM RATINGS
Stresses above those listed here may cause permanent damage to the DLP-232PC:
Operating Temperature: 0-70°C
Voltage on I/Os with Respect to Ground: -0.3V to +5.3V
Sink/Source Current on Any I/O: 25mA
4.0 WARNINGS
• Unplug from the host PC before connecting to the DLP-232PC.
• Observe static precautions to prevent damage to the DLP-232PC module.
Rev. 1.2 (July 2007) 3 © DLP Design, Inc.
5.0 USB DRIVERS
USB drivers for the following operating systems are available for download from the DLP Design
website:
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These drivers are available for download from the following page: http://www.dlpdesign.com/DNLD8/.
NOTE: If you are using the dual-mode drivers from FTDI (CDM2.00.00) and wish to use the Virtual
COM Port (VCP) drivers instead, then it may be necessary to disable the D2XX drivers first via Device
Manager. Right click on the entry under USB Controllers that appears when the DLP-232PC is
connected, select Properties, select the Advanced tab, check the option for “Load VCP” and click OK.
Once you unplug and then replug the DLP-232PC, a COM port should appear in Device Manager
under Ports (COM & LPT).
6.0 ANALOG CHANNEL SETUP
Channels that are to be used as analog inputs to measure voltage must be properly configured for
analog mode. There are 9 possible scenarios for the A/D Setup listed at the end of Table 1 ranging
from no analog channels active to all 8 channels active.
Analog channels must be activated in order starting with Channel 1. For example, if a systems design
requires a single analog channel and 13 digital I/O channels, then that analog channel must be
Channel 1. (Refer to the end of Table 1 for additional detail.)
Rev. 1.2 (July 2007) 4 © DLP Design, Inc.
7.0 USING THE DLP-232PC
Simply connect the DLP-232PC to the PC to initiate the loading of drivers. Once the drivers are
loaded, the DLP-232PC is ready for use. All commands are single-byte commands.
You can either utilize a simple terminal emulator program or write your own program in your language
of choice. Begin by opening the COM port, set the baud rate to 460800 (1 start bit, No parity, 8 data
bits, 1 stop bit), and send single-byte commands as shown in Table 1. The Ping command can be
used to locate the correct COM port used for communicating with the DLP-232PC, or you can look in
Device Manager to see which port Windows has assigned to the DLP-232PC.
uC
USB
Pin 9
Pin 10
Top View (Interface Headers on bottom of PCB)
Pin 1
Pin 18
T
TA
AB
BL
LE
E
1
1
Channel 1 Commands
ASCII
Character
Hex
Value
Description
Return / Comments
1 0x31 Dig Out – High Nothing returned
Q 0x51 Dig Out – Low Nothing returned
A 0x41 Digital Input Returns 0 or 1 (See Note 1)
Z 0x5A Analog In Returns measured voltage (See Note 1)
9 0x39 Temperature Returns current temperature (See Notes 1 and 2)
Channel 2 Commands
2 0x32 Dig Out – High
W 0x57 Dig Out – Low
S 0x53 Digital Input
X 0x58 Analog In
0 0x30 Temperature
Channel 3 Commands
3 0x33 Dig Out – High
E 0x45 Dig Out – Low
D 0x44 Digital Input
C 0x43 Analog In
- 0x2D Temperature
Rev. 1.2 (July 2007) 5 © DLP Design, Inc.
Channel 4 Commands
4 0x34 Dig Out – High
R 0x52 Dig Out – Low
F 0x46 Digital Input
V 0x56 Analog In
= 0x3D Temperature
Channel 5 Commands
5 0x35 Dig Out – High
T 0x54 Dig Out – Low
G 0x47 Digital Input
B 0x42 Analog In
O 0x4F Temperature
Channel 6 Commands
6 0x36 Dig Out – High
Y 0x59 Dig Out – Low
H 0x48 Digital Input
N 0x4E Analog In
P 0x50 Temperature
Channel 7 Commands
7 0x37 Dig Out – High
U 0x55 Dig Out – Low
J 0x4A Digital Input
M 0x4D Analog In
[ 0x5B Temperature
Channel 8 Commands
8 0x38 Dig Out – High
I 0x49 Dig Out – Low
K 0x4B Digital Input
, (Comma) 0x2C Analog In
] 0x5D Temperature
Rev. 1.2 (July 2007) 6 © DLP Design, Inc.
Channel 9 Commands
/ 0x2F Dig Out – High
a 0x61 Dig Out – Low
b 0x62 Digital Input
c 0x63 Temperature
Channel 10 Commands
d 0x64 Dig Out – High
e 0x65 Dig Out – Low
f 0x66 Digital Input
g 0x67 Temperature
Channel 11 Commands
h 0x68 Dig Out – High
i 0x69 Dig Out – Low
j 0x6a Digital Input
k 0x6b Temperature
Channel 12 Commands
l 0x6c Dig Out – High
m 0x6d Dig Out – Low
n 0x6e Digital Input
o 0x6f Temperature
Channel 13 Commands
p 0x70 Dig Out – High
q 0x71 Dig Out – Low
r 0x72 Digital Input
s 0x73 Temperature
Channel 14 Commands
t 0x74 Dig Out – High
& 0x26 Dig Out – Low
* 0x2A Digital Input
( 0x28 Temperature
Setup Commands (Remembered Until Power is Cycled)
` 0x60 Return ASCII Default setting; nothing returned (Accent Grave character just left of the
1 key)
\ 0x5C Return Binary Nothing returned
L 0x4C Set °F Default setting; nothing returned
; 0x3B Set °C Nothing returned
Ping Command
‘ 0x27 Issue Ping Q (0x51) will be returned if the DLP-232PC is found on the selected
port (Apostrophe character just right of the ; key)
Rev. 1.2 (July 2007) 7 © DLP Design, Inc.
A/D Setup
u 0x75 No Analogs A/D Converter disabled
v 0x76 CH1 Only A/D active on Channel 1 only
w 0x77 CH1 and CH2 A/D active on Channels 1 and 2
x 0x78 CH1,2,3 A/D active on Channels 1 through 3
y 0x79 CH1,2,3,4 A/D active on Channels 1 through 4
z 0x7A CH1,2,3,4,5 A/D active on Channels 1 through 5
# 0x23 CH1,2,3,4,5,6 A/D active on Channels 1 through 6
$ 0x24 CH1 – CH7 A/D active on Channels 1 through 7
% 0x25 CH1 – CH8 A/D active on Channels 1 through 8
LED Commands
{ 0x7B LED Off
} 0x7D LED On
Note 1 – Data is returned in either the form of ASCII characters (ex: 1.25V, 78.2°F) or binary (raw data)
depending upon the current mode. The power-up default mode is ASCII such that data is easily read using a
terminal emulator program.
Note 2 – Requires DS18B20 digital temperature sensor (purchased separately). See Section 8.0 of this
document for connection details.
8.0 TEMPERATURE
Up to 14 DS18B20 digital temperature sensors can be connected to the DLP-232PC. For best
performance, use Category 5 type computer cable to connect the sensors to the DLP-232PC. Two
pairs of wires in the Cat 5 cable are required for the connection. The first pair is for Power (5V) and
Ground, and the second pair is designated as Data and Ground. In addition, a pull-up resistor is
required for the data line in the range if 1.5K-4.7K Ohms. Figure 1 shows an example of this
connection using I/O Channel 1:
FIGURE 1
1. GND
2. DATA
3. VCC
Pin 1
DS18B20
DLP-232PC
1.5K - 4.7K Ohm
9
10
11
The first time temperature data is requested, a value of 999.99° (0xFF x 2 if in Binary Mode) is
returned. Subsequent reads will return valid temperature data if a temperature sensor is properly
configured and connected to the specified I/O port. If no sensor is connected, a Temperature
command will always return 999.99°.
Rev. 1.2 (July 2007) 8 © DLP Design, Inc.
9.0 RETURN DATA TYPES
By default, the DLP-232PC returns data to the host PC in the form of ASCII text such that it can be
easily displayed and read using a simple terminal emulator. Alternatively, data can be returned in
binary form requiring the user’s host app to calculate the voltage and temperature values. The
commands used to set the return data types (0x60 and 0x5C) are shown at the end of Table 1.
10.0 MECHANICAL DIMENSIONS IN INCHES (MM) (PRELIMINARY)
0.23 typ
(5.8 typ)
0.21 typ
(5.3 typ)
Side View
0.37 typ
(9.4 typ)
0.60 typ
(15.2 typ)
0.22 typ
(5.6 typ)
1.37 typ
(34.8 typ)
0.43 typ
(10.9 typ)
0.20 typ
(5.1 typ)
11.0 DISCLAIMER
© DLP Design, Inc., 2007
Neither the whole nor any part of the information contained herein nor the product described in this
manual may be adapted or reproduced in any material or electronic form without the prior written
consent of the copyright holder.
This product and its documentation are supplied on an as-is basis, and no warranty as to their
suitability for any particular purpose is either made or implied. DLP Design, Inc. will not accept any
Rev. 1.2 (July 2007) 9 © DLP Design, Inc.
claim for damages whatsoever arising as a result of the use or failure of this product. Your statutory
rights are not affected. This product or any variant of it is not intended for use in any medical
appliance, device, or system in which the failure of the product might reasonably be expected to result
in personal injury.
This document provides preliminary information that may be subject to change without notice.
12.0 CONTACT INFORMATION
DLP Design, Inc.
1605 Roma Lane
Allen, TX 75013
Phone: 469-964-8027
Fax: 415-901-4859
Email Sales: sales@dlpdesign.com
Email Support: support@dlpdesign.com
Website URL: http://www.dlpdesign.com
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
DLP-232PC
Version 1.1
PGD
SWVCC
PGC
USBVCC
24MHz
CH2
CH4
SWVCC
SWVCC
CH1
PORTVCC
CH8
CH7
CH9
CH5
CH3
CH10
CH11
CH6
MCLR
CH11CH10
CH13
CH12
CH14
CH9
CH7
CH8
CH4
CH1
CH2
CH5
LED
LED
SWVCC
MCLR
SWVCC
CH12
TOHST
CH14
PGC
MCLR
PGD
FRMHOST
CH13
TOHST
FRMHOST
PWREN#
24MHz
SWVCC
PWREN#
USBVCC
CH3
CH6
PORTVCC
C4
.01
J1
HEADER 9X2
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
C9
0.1uF
C6
.1uF
D1
LED
R1
360
C8
47pF
TP3
1
TP2
1
J3
HEADER 5
1
2
3
4
5
CN1
5-pin Mini-B
1
2
3
4
5
U2
PIC18F2410/QFN
26
27
28
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
MCLR/VPP
RA0/AN0
RA1/AN1
RA2/AN2/VREF-
RA3/AN3/VREF+
RA4/T0CKI
RA5/SS/AN4
GND
OSC1/CLKIN
OSC2/CLKO/RA6
RC0/T1OSO/T13CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
GND
VDD
RB0/INT/AN12
RB1/AN10
RB2/AN8
RB3/AN9
RB4/AN11
RB5/PGM
RB6/PGC
RB7/PGD
R3
360
FB3
240-1018-1
1 2
R2
47K
C1
.1
C3
10/10 Tant
Q1
IRLML6402CT P
TP1
1
C2
0.1uF
C7
47pF
U1
FT232RQ
30
31
32
1
2
3
4
6
7
8
9
10
11
14
15
16
17
18
19
20
21
22
24
26
27
28
TXD
DTR#
RTS#
VCCIO
RXD
RI#
GND
DSR#
DCD#
CTS#
CBUS4
CBUS2
CBUS3
USBDP
USBDM
3V3OUT
GND
RESET#
VCC5 IN
GND
CBUS1
CBUS0
AGND
TEST
OSCI
OSCO
C5
.47uF
