Features
•
Complete Touchscreen Module:
–
Projected Capacitive Multi Touch Controller
–
3.5in LCD
–
200 bytes non-volatile serial EEPROM
•
Touch:
–
Atmel maXTouch™ mXT112S Touch Controller
–
Supports up to 4 touches
•
Display:
–
320x480 resolution
–
ILI9488 driver IC
–
30 ms max response time
–
White LED backlight
–
8-bit MCU parallel interface
•
Cover Panel:
–
1.1mm Soda Lime Glass
PDA TM3500:
3.5in PCAP
Touch Module
TM3500
Visit
http://www.pdaatl.com/tm3500
for the latest information on the TM3500
1410-3-4
Contents
1
Module Overview
1.1
1.2
1.3
1.4
1.5
2
PCB Connections
Display Flex Connector J1
Host Interface J2
Touch Sensor Flex Connector J3
Debug Connector J4
4
4
5
6
7
7
8
8
9
9
9
10
10
10
11
11
11
12
12
13
13
14
14
15
15
15
15
16
16
17
17
18
18
19
20
Overview of the 3.5in PCAP Touch Module
2.1
2.2
2.3
2.4
2.5
2.5.1
2.6
Introduction
Background Concepts
Module Logic Voltage
LCD Panel
maXTouch Capacitive Touchscreen Controller
maXTouch Controller Interface
Serial EEPROM
3
Getting Started
3.1
3.2
3.3
3.3.1
Hardware Connections
Software
Using the Touch Module
Evaluating the Touch Module
4
Specifications
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.9
Mechanical Specifications
Module Parameters
Absolute Maximum Specifications
Recommended Operating Conditions
DC Specifications
I2C-compatible Bus Specifications
Power Consumption
LCM Specification
LCM Parameters
LCM Absolute Maximum Specifications
LCM DC Specifications
LCM Backlight Specifications
LCM Optical Characteristics
TM3500 Part Number
5
I2C Basics (I2C-compatible Operation)
2
PDA TM3500: 3.5in PCAP Touch Module
1410-3-4
PDA TM3500: 3.5in PCAP Touch Module
5.1
5.2
5.3
5.4
5.5
5.6
6
7
Interface Bus
Transferring Data Bits
START and STOP Conditions
Address Byte Format
Data Byte Format
Combining Address and Data Bytes into a Transmission
20
20
20
21
21
22
23
24
Revision History
Notes
3
1
Module Overview
1.1 PCB Connections
Touch Sensor
Flex
J3
Pin 1
ATMEL
MXT1 2 S
1
D S24B33
Pin 1
Figure 1 - PCB Connectors
NOTE: Insert flex in Host Connector J2 with contacts facing DOWN.
The following notations are used for pin descriptions:
I
O
Input only
Output only, push-pull
OD
P
Open drain output
Ground or power
MXT
EE
maXTouch touchscreen
Serial EEPROM
LCD
Pin 1
Display
J1
Flex
J2
Host
LCD Panel
NOTE: Inputs and output are defined from the standpoint of the Touch Module.
4
PDA TM3500: 3.5in PCAP Touch Module
1410-3-4
PDA TM3500: 3.5in PCAP Touch Module
1.2 Display Flex Connector J1
Connector J1 connects to the LCD panel flex and carries signals between the Host and the LCD Panel.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Type
P
P
P
P
P
P
P
P
O
O
O
P
P
O
O
O
O
O
O
O
O
O
O
GND
LED/K6
LED/K5
LED/K4
LED/K3
LED/K2
LED/K1
LED/A
IM2
IM1
IM0
VDD_IO
GND
LCD_DATA_17
LCD_DATA_16
LCD_DATA_15
LCD_DATA_14
LCD_DATA_13
LCD_DATA_12
LCD_DATA_11
LCD_DATA_10
LCD_DATA_9
LCD_DATA_8
Description
Pin
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Type
O
O
O
O
O
O
O
O
P
O
O
-
O
O
O
O
O
O
O
I
O
P
Description
LCD_DATA_7
LCD_DATA_6
LCD_DATA_5
LCD_DATA_4
LCD_DATA_3
LCD_DATA_2
LCD_DATA_1
LCD_DATA_0
Vdd
VSYNC
HSYNC
N/C
RDX
DE
~RESET
PCLK
~SS
D/CX
SCK
MOSI
MISO
GND
5
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