SmartSet Technical Reference Manual

SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
1
E281-2310 Serial Controller
The following figure shows the mounting dimensions, jumper locations, and
connections for the IntelliTouch® E281-2310 serial controller:
Figure 1. E281-2310 Serial Controller
The following table lists the jumper settings for the E281-2310 controller:
Reserved
Reserved
Emulation Mode
None
E281A-4002
Reserved
(From Top)
J0 - N
J1 - N
J2 - N
J2 - Y
J3 - N
E281-2310 Emulation Modes
If you are using driver software that does not directly support the SmartSet™
serial protocol (E281-23xx, E271-22xx), the controller can be set up through
jumper J2 for hardware compatibility with the IntelliTouch E281A-4002
controller.
DOC # SW000027-B (Preliminary)
August 13, 1998
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
2
Serial Controller Installation
This section assumes you are integrating the E281-2310 serial controller board
into your system as a component.
The following information gives you mounting dimensions, touchscreen
connections, power connections and requirements, and data output connections. It
is your responsibility to determine how best to mount the controller and data
connector in the display or separate enclosure, and provide a power supply.
Mounting the Controller and Connecting Chassis Ground
The mounting dimensions for the E281-2310 controller are shown in Figure 1,
page 1. Remember that the cable headers will increase the space required.
The mounting holes fit common 0.156 inch plastic snap-in standoffs. A chassis
ground connection is required through one of the plated through mounting holes
(PTH) or P4 pin 8 to provide adequate shielding for the touchscreen cable.
Conductive mounting hardware can provide a chassis ground connection for the
controller.
Serial Controller Connections
Power Connections
The E281-2310 controller operates on a single voltage, positive with respect to
ground. See page 10 for power requirements.
Connect a power cable harness to P4 on the controller, a 2x5 header with pins on
0.100" centers. Use a ribbon cable with an IDC connector or crimp-to-wire pin
receptacles. An acceptable plug can be selected from Molex series 70450, Amp
AMPMODU Mod. IV product line, or Berg mini-latch housing with Mini-PV pins.
Connect a power supply to the harness and then to AC.

9
7
5
3
1
·
·
·
·
·
X
·
·
·
·

10 8 6 4 2
Figure 2. P4 Power Supply Connector Pin Positions, End View
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
P4 Pins
1
2
3
4
5
6
7
8
9
10
3
Signal
Function
+Pwr
Supply voltage positive
PwrCom
Supply voltage negative (tied to pin 4)
N/C
PwrCom
Supply voltage negative (tied to pin 2)
LED Remote External LED driver
Key
N/C
Chassis
Frame ground connection
-Reset
Open collector input: open = normal
operation; short to PwrCom = hardware
reset.
N/C
CAUTION
Observe polarity when connecting the power leads to the power supply. Reversing
polarity may damage the controller.
Serial Connections
The E281-2310 controller operates at standard RS232C levels. The serial port
connector, P2, is a 2x5 header with pins on 0.100" centers. It is configured so a
ribbon cable and commonly available insulation displacement connectors (IDCs)
may be used.
7
5
3
1
·
·
·
·
·
·
·
·
·
X
9


10 8 6 4 2
Figure 3. P2 Serial Connector Pin Positions, End View
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
P2 Pins
1
2
3
4
5
6
7
8
9
10
DB25
8
6
3
4
2
5
20
22
7
DB9
1
6
2
7
3
8
4
9
5
4
Host Signal
DCD (N/C)
DSR
RXD
RTS
TXD
CTS
DTR
RI (N/C)
GND
Key
The controller only requires a 2-wire connection, controller Transmit Data (P2
pin 3) and Signal Ground (P2 pin 9). For two-way communications, the controller
Receive Data (P2 pin 5) should also be connected to the host Transmit Data pin.
Data Set Ready (DSR) and Clear to Send (CTS) may be used by the host to verify
controller connections and operation. DSR is asserted when power is applied to
the controller and CTS is asserted when the controller's power-on sequence is
complete. Data Terminal Ready (DTR) and Request to Send (RTS) can also be
connected for full hardware handshaking.
Elo driver software typically requires two-way communication (unless ELODEV’s
-p- flag is used), and all four handshaking lines.
If you are installing the controller inside a display, we recommend that you make a
cable that connects P2 to a DB9 female connector mounted on the back of the
display, or use Elo's serial cable P/N 012138. (Male connectors are used on
TouchMonitors with external controllers.) The shell of this connector should be
tied to chassis ground. Use an additional cable from the back of the display to your
serial port.
Elo can provide suitable adapters and cabling. See the IntelliTouch Product
Manual for details.
Touchscreen Connections
A round multi-conductor cable terminated in a 2x6 female connector is attached to
the IntelliTouch touchscreen. One of the following cabling options normally
applies:
•
If the controller will be located inside the display, the touchscreen cable
connects directly to the 2x6 header at P3 on the controller (see Figure 1,
page 1).
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
•
5
If the controller will be external to the display, the touchscreen cable should be
terminated at the back of the display with a DB9 male connector. Use Elo's
IC1 adapter cable (P/N 012226). Then connect a cable from the DB9 male
connector to the controller using Elo's cable P/N 002863-6-2 with the Elo
002861-2-12 adapter. Unlike the serial cable, the touchscreen cables have a
special construction. Use only Elo Touchscreen cables and adapters.
2
4
6
8 10 12
·
·
·
·
·
·
·
X
·
·
X
·


1 3 5 7 9 11
Figure 4. P3 Touchscreen Connector Pin Positions, End View
Diagnostic LEDs
The E281-2310 controller has one green diagnostic LED. Following power on, the
controller performs a short self-test, where the LED stays lit. After the self-test,
the LED flashes once per second, indicating normal operation. The self-test results
are displayed by most Elo driver software.
During normal operation, the LED also indicates controller/host communication is
in progress. When the touchscreen is touched, the LED should light continuously,
then return to the normal flash rate. If the host does not remove the packet from
the controller, the LED will stay lit.
The LED will also stay lit without a touch if the touchscreen or cabling is
disconnected or not functioning.
If the LED flashes about two times per second, a warning error condition is
indicated, such as improper communication from the host. Suspect an invalid
command sequence from the host.
Remote LED Capability
The microprocessor pin that drives the status LED is connected to pin 5 of the P4
power supply connector. This signal from the microprocessor may also be used to
drive an external indicator such as another LED.
To operate an external LED, connect the LED anode to a +5 Vdc power supply
and the cathode to pin 5 of the P4 connector. (Nominal current through the LED
will be 3 mA—the LED will be comparatively dim.)
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
6
COMMAND REFERENCE
The following changes/additions are to Command Descriptions found in the
SmartSet Touchscreen Controller Family Technical Reference Manual:
page 82
'0'
'9'
'H'
'I'
'J'
'L'
'M'
'N'
page 83
Untouch factory default value is 2 for the E281-2310 controller.
page 84
Not supported.
page 87
DMask
Bit
7
5
30h
39h
48h
49h
4ah
4ch
4dh
4eh
No Warning
Reserved
Reserved
Reserved
Reserved
Operation failed
Measurement warning
Measurement error
Description
Touchscreen Drive test incomplete
Touchscreen Drive test failed
DMask2 - byte 2
Bit
7
6
5
4
3
2-0
Description
Microprocessor logic failure
Internal RAM read/write test failure
External RAM read/write test failure
PROM checksum failure
DAC hardware test failure
Touchscreen drive test results
000 No failure
001 X-axis failure
010 Y-axis failure
011 X receive channel failure
100 Y receive channel failure
101 X transmit channel failure
110 Y transmit channel failure
111 General failure (touchscreen may not be
connected)
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
page 88-89
The following combinations of the TouchFlag and Format number
are supported:
Touch Flag
‘0’
‘0’
‘0’
‘1’
‘1’
‘1’
page 90
7
0
Set or
Response: ‘F’
Format
‘0’
‘4’
‘6’
‘0’
‘4’
‘6’
1
2&3
Type
Rep
4
5
6
7
Ofs MinLen MaxLen
The Rep word specifies the maximum number of times (1-65535)
that a repeating coordinate value is permitted to be measured by the
controller. If the number of times that a coordinate repeats in X, Y,
and Z exceeds this value, then the controller relearns the
touchscreen waveform. This parameter determines the tolerance of
contaminants on the touchscreen. The factory default value is 2432,
which is about 25 seconds.
The Ofs byte specifies the amount (0-255) of surface wave energy
absorption that is recognized as a touch. A small value increases
touch sensitivity. A large value increases noise rejection. The
factory default value is 2.
The MinLen byte specifies the minimum width of a touch (0-255).
As with the previous argument, a small value increases the
sensitivity and a large value increases noise rejection. The factory
default is 2.
The MaxLen byte specifies the maximum width of a touch (0-255).
This parameter controls the rejection of multiple touches and
splattered contaminants. The factory default is 22.
page 91
Not supported.
page 92
Not supported.
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
page 93
8
Features byte:
Bit 7 is 1 - Z-axis available.
page 95
X1 is a bitmap specifying which option jumpers are installed:
X1 Bit Position
0
1
2
3
Description
J0 installed
J1 installed
J2 installed
J3 installed
X2 is a bitmap specifying whether cross-connected jumpers are
installed:
X2 Bit position
0
1
2
page 97
Not supported.
page 98
Not supported.
page 99
Mode1:
Bit
6
7
Description
jumper connects J0 to J1
jumper connects J1 to J2
jumper connects J2 to J3
Description
Reserved (0)
1 - Z-axis Enable
Mode2:
All bits reserved (0).
page 102
Not supported.
page 104
Not supported.
page 108
Not supported.
page 109
Hard Reset Command: If the host cannot monitor -CTS,
approximately 5 seconds should be allowed for the reset procedure
to take place.
page 110
Not supported.
page 112
Set or query commands are not supported. Touch packets are
generated automatically.
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
9
Status bits:
Bit
6
7
Description
Reserved (0)
If 1, the Z coordinate is measured, not
simulated at the maximum value.
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
10
E281-2310 SPECIFICATIONS
Electrical
Supply Voltage and Current
+5 Vdc, nominal (+4.75 to +5.25 Vdc).
140 mA, typical at +5 Vdc. Average power dissipation is 0.7 W, typical.
Supply must be capable of sourcing 200 mA, minimum, and have a rise time of less
than 100 ms. Conformance to this specification is yet to be determined.
Total noise and ripple requirement must be less than 100 mV (p-p) for frequencies
below 1 MHz, and less than 5 mV (p-p) for frequencies above 1 MHz.
Interface
EIA 232D (Serial RS-232), DCE configuration. 8 Data Bits, 1 Stop Bit, No Parity,
Half Duplex. Hardware handshaking: DTR/DSR, RTS/CTS.
Acknowledgments for command set and query.
Baud Rate
9600 only.
Operating Modes
Binary in SmartSet or E281A-4002 protocols, jumper selectable.
Initial/Stream/Untouch/Z-axis Enable Modes.
Touch Resolution
Approximately 4095x4095, size independent, 255 levels of Z (pressure).
Conversion Time
Approximately 10.4 ms per coordinate report.
Reliability
MTBF greater than 60,000 hours per MIL-HDBK-217E Notice 1 update part
count calculation. Conformance to this specification is yet to be determined.
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
11
Reliability is enhanced by Elo's standard manufacturing practice of submitting all
controllers to a 10-hour burn-in at 50°C with 50% power on/off cycle.
Environmental
Temperature
Operating:
0°C to 65°C.
Storage:
-25°C to 85°C.
Conformance to this specification is yet to be determined.
Humidity
Operating:
10% to 90% RH, non-condensing.
Storage:
Same.
Conformance to this specification is yet to be determined.
Altitude
10,000 feet. Conformance to this specification is yet to be determined.
Shock and Vibration
National Safe Transit Association Project 1A Test Procedure. Conformance to this
specification is yet to be determined.
ESD
Per IEC 801-2(E): 1991. Conformance to this specification is yet to be
determined.
Flammability
The printed circuit board substrate is rated 94V0. All plastic components also
rated 94V0.
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
12
Physical Characteristics
Construction
Four-layer surface-mount design with internal ground plane for EMI suppression.
Dimensions
See Figure 1, page 1. Total height including shield less than 0.75".
Mounting Hole Dimensions
See Figure 1, page 1. Two mounting holes are plated through-holes (PTH) for
chassis ground connection.
Connectors and Pin Definitions
The connector configuration permits the controller to be placed in-line between the
touchscreen and serial I/O attachments.
Serial Input/Output Connector
2x5 0.025" post latching header on 0.100" centers. Acceptable mating insulation
displacement connectors (IDC): Berg series 71600, 71602, 66900, 66902, Molex
series 40312, Amp series 746285 and 746288. When the mating IDC receptacle is
cabled to an IDC DB9 connector, the interface assumes a DCE configuration.
Touchscreen Connector
2x6 0.025" square post friction lock header on 0.100" centers. Mates with Berg
Mini-Latch receptacle on the IntelliTouch touchscreen cable. The withdrawal force
exceeds 3.9 lb.
Power Connector
2x5 0.025" square post friction lock header on 0.100" centers. Acceptable mating
receptacle connectors: Molex series 70450, Amp AMPMODU Mod. IV product
line, or Berg mini-latch housing with Mini-PV pins.
SmartSet Technical Reference Manual—Addendum for the E281-2310 Controller
13
Agency Approvals
Elo TouchSystems controller board model E281-2310 is a UL Recognized
Component, CCN NWGQ2, per UL 1950, Safety of Information Technology
Equipment Including Electrical Business Equipment. Recognition information is
contained in File E162681.
Elo TouchSystems controller board model E281-2310 is a UL Recognized
Component for use in Canada, CCN NWGQ8, per UL 1950, Safety of Information
Technology Equipment Including Electrical Business Equipment Certified for
Canada. Recognition information is contained in File E162681.
The E281-2310 has been tested to verify compliance with FCC Class B
commercial limits. Test results are on file. Conformance to these or to more
stringent limits may require special attention to system grounding and shielding,
and it may be necessary to apply ferrite suppressor beads to cables.