Holtek ESK32-A2A31 Manuale utente
ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Revision: V1.00 Date: February 02, 2018February 02, 2018
Rev. 1.00 2 of 12 February 02, 2018
ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Table of Contents
Table of Contents
1 Introduction............................................................................................................. 5
2 Hardware Layout..................................................................................................... 5
Communication Interface Switch – SW1 .......................................................................................... 6
Extension Connector – CN2 ............................................................................................................. 6
3 Using the Module.................................................................................................... 7
Tool Preparation..................................................................................................................... 7
LCD Module Setting............................................................................................................... 7
Expansion Board Setting ....................................................................................................... 7
Board Assembly..................................................................................................................... 9
Obtain the Example Program ................................................................................................ 9
Compile and Execute the Program...................................................................................... 10
4 Schematics............................................................................................................ 10
2.8 Inches TFT LCD Module – ESK32-A2A31.................................................................................11
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
List of Tables
List of Tables
Table 1. Communication Interface Switch SW1........................................................................................ 6
Table 2. Extension Connector CN2........................................................................................................... 6
Table 3. Expansion Board EBI Interface Switches.................................................................................... 8
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
List of Figures
List of Figures
Figure 1. TFT LCD Module Layout ........................................................................................................... 5
Figure 2. Extension Connector CN2 ......................................................................................................... 6
Figure 3. LCD Module Communication Interface Setting ......................................................................... 7
Figure 4. LCD Module + Expansion Board + Starter Kit ........................................................................... 9
Figure 5. HT32 Firmware Library Download Web Link........................................................................... 10
Figure 6. 2.8 Inches TFT LCD Module (ESK32-A2A31) Schematic ........................................................11
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Introduction
1 Introduction
The ESK32-A2A31 TFT LCD Module is designed for the HT32 series expansion board. It supports
SPI and EBI communication interfaces. The ESK32-A2A31 hardware and software can be used
with the ESK32-20001/ESK32-21001 and the HT32 firmware library, providing users with a
complete development environment with which to learn how to use the EBI and SPI interfaces.
Specications:
▆Use Himax’s TFT LCD driver IC: HX8347-I (T)
▆2.8 inch TFT LCD with 65 K colours and 320×240 resolutions
▆Supports SPI and EBI interfaces
2 Hardware Layout
Figure 1. TFT LCD Module Layout
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Hardware Layout
Communication Interface Switch – SW1
Table 1. Communication Interface Switch SW1
Switch No. Description
1 2 3 4
0 0 0 x 8080 MCU 16-bit parallel
1 0 0 x 8080 MCU 8-bit parallel
ID 0 1 x 3-wire serial interface
x 1 1 x 4-wire serial interface
x: Don‘t care
Extension Connector – CN2
Figure 2. Extension Connector CN2
Table 2. Extension Connector CN2
Pin No. Description Pin No. Description
1 VDD5 2 GND
3 BL_EN 4 NC
5 NC 6 WR/SCL
7 MISO 8 MOSI
9 /CS 10 NC
11 NC 12 /Reset
13 GND 14 VDD33
15 PD0 16 PD1
17 PD2 18 PD3
19 PD4 20 PD5
21 PD6 22 PD7
23 PD8 24 PD9
25 PD10 26 PD11
27 PD12 28 PD13
29 PD14 30 PD15
31 PD16 32 PD17
33 /RD 34 RS
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Using the Module
3 Using the Module
Tool Preparation
Users need to prepare the HT32 Series expansion board (ESK32-2x001) and the Starter Kit
(ESK32-30xxx)
LCD Module Setting
Before adjusting the communication interface using SW1, refer to the following descriptions and
gure 3 for the LCD module setting details.
If the MCU uses the EBI interface to drive the LCD module, the LCD module should be selected to
be in the EBI mode by switching SW1 of the LCD module to “0000” (default setting).
If the MCU uses the SPI interface to drive the LCD module, the LCD module should be selected to
be in the SPI mode by switching SW1 of the LCD module to “0010”.
Figure 3. LCD Module Communication Interface Setting
Expansion Board Setting
The expansion board settings, J1, J2 and J3 are associated with the LCD module, refer to table 3 for
more details. Refer to the “ESK32-2x001 Expansion Board User Manual” for details on using this
expansion board.
J1: This is used to select whether the LCD Backlight is controlled by the MCU I/O pins or not.
When the MCU I/O pins are insufcient, J1 can be switched to the BL_ON position, ensuring
that the LCD Backlight is always on.
J2: This is used for the EBI interface read operation and determines the MCU EBI OE pin is
connected to the nRD pin of the LCD module or not. When the LCD module needs to read back
the registers or display the RAM, J2 should be switched to OE.
J3: If the MCU supports the EBI interface, then J3 should be open, otherwise J3 should be shorted.
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Using the Module
Table 3. Expansion Board EBI Interface Switches
Jumpers Descriptions
J1
LCD Backlight will always be on
LCD Backlight controlled by I/O pin
J2
The LCD module nRD pin is switched to the EBI OE pin
The LCD module nRD pin is switched to a xed pull high
J3
Short: LCD SPI mode
Open: LCD EBI mode
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Using the Module
Board Assembly
The HT32 series expansion board (ESK32-2x001) is connected to the Starter Kit and the 2.8 inch
LCD module, as shown in gure 4.
Figure 4. LCD Module + Expansion Board + Starter Kit
Obtain the Example Program
Download the latest Holtek HT32 Firmware Library. The download web link is shown in gure 5.
Unzip the HT32 Firmware Library after downloading.
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ESK32-A2A31 2.8 Inch TFT LCD Module
User Manual
Schematics
Figure 5. HT32 Firmware Library Download Web Link
Compile and Execute the Program
Open the LCD example project:
Keil: \example\LCD\LCD28\MDK_ARMvx\Project_xxxxx.uvprojx
IAR: \example\LCD\LCD28\EWARMvx\Project_xxxxx.eww
Compile and execute the LCD example program after which, “Holtek HT32 Series LCD Example”
will appear on the LCD.
4 Schematics
This section shows the LCD module circuitry.
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