FORENEX FES4335U1-56T Memory Mapping Graphics Control Module User Manual
- June 9, 2024
- FORENEX
Table of Contents
FORENEX FES4335U1-56T Memory Mapping Graphics Control Module
Revision histories
| Rev. No. | Date | Substantial Changes |
|---|---|---|
| 1.0 | 2016 | First issue. |
General Description
FES4335U1-56T is a low cost, high efficiency and smart of TFT-LCD display
control module which can provide characters or 2D graphics application within
an embedded 768KB of display RAM.
FES4335U1-56T offers serial interface (Uart-TT) to establish a hardware
communication with an external simple MCU (as like 8051 etc.), and providing
the “Commands Table” for graphical effect calling and execution.
According to the “Commands Table” of graphics APIs, the external MCU only need
to transmit the corresponding command code with parameters into FES4335U1-56T
over serial interface. The command decoder inside of FES4335U1-56T would go to
implement the graphics task by automatically.
The FG875D_command_encoder.exe is a PC’s software utility and providing user to experience the various function commands in “Commands Table”.
| Item | Specification | Remark |
|---|---|---|
| LCD size | 5.6 inch(Diagonal) | |
| Resolution | 640 x 3(RGB) x 480 | dot |
| Display type | Normally White, Transmissive | |
| Dot pitch | 0.0588(W) x 0.1764(H) mm | |
| Active area | 112.896(W) x 84.672(H) mm | |
| Module size | 142.5(W) x 100.0(H) x 16.72(D) mm | |
| View angle | L:70/ R:70/ T:50/ B:70 | θ |
| Surface treatment | Anti-Glare | |
| Color arrangement | 64k colors w/ RGB-stripe | |
| Touch type | 4-wire Resistive | |
| Backlight | Build-in LED driver | |
| Interface | Uart (TTL-RX/TX), 115200/N/8/1 | |
| Software offer | Commands Table | Note1 |
| Operation Temp | -10℃ to 60℃ | |
| Storage Temp | -20℃ to 70℃ |
Note1: All of usable APIs is summarized in commands Table. Please refer
to document
(FG875D_Commands Table_vx.pdf). And detail usage description for each command,
refer to (FG4335x_software_Note_V1.pdf).
Pin Assignment
UART Input interface (H4)
Connector: (Box Header_2x5pin/ 2.0mm/ side entry)
Pin num| Description| I/O| Note| Pin num|
Description| I/O| Note
Pin1| GND| | | Pin2| RX| I|
Pin3| TX| O| | Pin4| NC| |
Pin5| Shield GND| | | Pin6| NC| |
Pin7| NC| | | Pin8| NC| |
Pin9| 5V/350mA| I| 1| Pin10| 5V/350mA| I| 1
NOTE1: External power source DC5V input
2-2、Alternative Power connector (W2) option
Connector: (wafer_2pin/ 2.0mm/ side entry)
Pin num| Description| I/O| Note| Pin num|
Description| I/O| Note
Pin1| GND| I| | Pin2| 5V/700mA| |
To provide an extra-connector for external power source input. If the power source (DC5V) do not provides from the Pin 9&10 of H4.
GPIO interface (H2)
Connector: (Header_2x5pin/ 2.0mm/ side entry)
Pin num| Description| I/O| Note| Pin num|
Description| I/O| Note
Pin1| GPO 0| O| 2| Pin2| GPI 0| I| 3
Pin3| GPO 1| O| 2| Pin4| GPI 1| I| 3
Pin5| GPO 2| O| 2| Pin6| GPI 2| I| 3
Pin7| GPO 3| O| 2| Pin8| GPI 3| I| 3
Pin9| GND| | | Pin10| GND| |
NOTE2: The GPO_0 ~ 3 are output with open-drain and should have a pull-
high resister on external board.
NOTE3: The GPI_0 ~ 3 are 3.3V input with 5V tolerant.
Operation Specifications
Electrical specifications
Absolute Maximum Ratings
| Symbol | Symbol | Min. | Max. | Unit | Note |
|---|---|---|---|---|---|
| Power Voltage | VCC | -0.3 | 5.2 | V | |
| Operating Temperature | TOP | -10 | 60 | ℃ | |
| Storage Temperature | TST | -20 | 70 | ℃ |
*The absolute maximum rating values of this product are not allowed to be exceeded at any times.
Recommended operating condition
Symbol| Description| Min.| Typ.| Max.| Unit|
Note
---|---|---|---|---|---|---
Vcc| Supply voltage| 3.7| 5| 5.2| V|
Icc| Current| 0.7| | | A|
UART_TTL(Tx,Rx,CTS,RTS) & I2C(SCL,SDA) signal level
VIH| Input High Voltage| 2.64| | 3.3| V|
VIL| Input Low Voltage| 0| | 0.66| V|
VOH| Output High Voltage| 2.9| | 3.3| V|
VOL| Output Low Voltage| 0| | 0.4| V|
Optical Specifications (θ=0°)
CR| Contrast Ratio| 400| 500| | |
L| Luminance| 230| 280| | cd/m²|
Baud Rate
UART| | 115200| | bps|
Power consumption @ 5v input, 100% brightness
Consumption| 5.6” , 640×480| 3.1| W|
Mechanical specification
Hardware specification
Block Diagram
Figure 3-a : FES4335 Block Diagram
Hardware Interface
- The adapted model is FES4335U1-56T.
- UART (TTL-RX/TX): 3-wire (TX, RX, GND) refer to (Section: pin assignment).
- Baud Rate: be fixed at 115200 bps/N/8/1.
- The connectivity between Host and FES4335U1-56T
Software
Communication (handshaking)
Due to the serial interfaces (Uart-TTL) those FES4335 has offer to establish a communication with an external host. The host is able to transmit a command stream to FES4335 for a task implementation asking.
According to the capacity of transmission, the command stream format is simply defined into two categories.
- Standard Command Stream: This is an essential command stream format for each one task which is listed in the Commands Table. (Refer to Section 4-3 Commands Table).
- Bulk Data Transmission Stream: Only provide to some tasks will ask for a bulk data transmission, and the asking has confirmed during the standard command stream stage.
Currently only below two tasks which will ask for a Bulk Data Transmission protocol.
- FG875D_WriteToSerialROM (function code 0x21).
- FG875D_ Display _Block_RW (function code 0x24).
According to the Commands Table, each command has a unique function code for a
specific operation task. (Refer to Section 4-3 Commands Table).
Therefore, once the FES4335 has received a complete of Standard Command Stream
and which part of checksum is checked firstly. After that, the function code
part would be identified and implemented along with parameters part.
There are a specifically code area 0x50~0x5F where will dedicate to define some message code and also be isolated from the all of function code.
| Return message code | ASCII | hex | Description |
|---|---|---|---|
| Wrong code | “X” | 0x58 | Checksum error |
| Waiting code | “W” | 0x57 | FES4335 is busy |
| Ready code | “S” | 0x53 | FES4335 is ready |
| Timeout code | “T” | 0x54 | Receive Timeout |
| Touch Interrupt code | “P” | 0x50 | Touch panel has been touched |
| Command success code | Function code | Command implement success | |
| Bulk transmission success code | 0x55,0xAA | Bulk data transmission success |
If there is no error encountered during transmission.
The FES4335 will implement command according to function code that has
received in Standard Command Stream Stage, and return function code to Host
for success checking.
or
Return function code (0x55,0xAA) to indicate this time of Bulk Data
Transmission has
completed without problem in “Bulk Data Transmission stage”.
Return Success code or (0x55,0xAA), informing a success status.
Host could send next new command stream.
- If there is any unexpected condition has encountered during transmission.
The FES4335 will return a corresponding error code message and along with the received function code for error checking.
If return Wrong code (0x58) like below. (indicate a Checksum error has occurred)
Standard Command Stream stage error
or Bulk Data Transmission stage error
Host should repeat the previously command stream.
If return Timeout code (0x54) like below, (indicate a Timeout error has
occurred) Standard Command Stream stage error
or Bulk Data Transmission stage error
Host should repeat the previously command stream.
Return Wait code (0x57) like below, (indicate a wait status has occurred) Standard Command Stream is Busy Bulk Data Transmission is Busy To inform host that FES4335 is in a busy status. Host should temporary stop transmission until FES4335 return Ready code (0x53) and then continue the command stream or bulk data stream those do not finish data yet.
Return Ready code (0x53) like below, (indicate a ready message has occurred)
Standard Command Stream is Ready
or Bulk Data Transmission is Ready
To inform host that FES4335 has released from the period of busy status. The
Host can continue the rest of command stream or bulk data stream.
-
A specific code to inform the touch interrupt has occurred and also would return the coordinate (x,y) value of touch panel automatically.
- Return Touch interrupt code (0x50) with coordinate (x,y) value like below,
-
a. In a bulk data transmission stage, the FES4335 will temporary to disable touch function and stop return the coordinate (x,y) of touch.
-
b. Out of a bulk data transmission stage. FES4335 would automatically return the coordinate (x,y) of touch when a touch interrupt has occurred.
-
c. Host could also to poll the coordinate (x,y) value by sending Function code 0x03 (APIs:FG875D_Detect_Touch).
Command (Stream /Format /protocol)
Standard Command Stream
- Format: This format combines a byte of function code and several parameter bytes and a byte of checksum code.
- Protocol:
Bulk Data Transmission
Since the function code in Standard Command Stream is (0x21) or (0x24) that
will ask a bulk data transmission task after those function code have be
identified by FES4335.
In this case, the whole communication process will be separated into two
stages (Standard Command Stream stage + Bulk Data Transmission protocol
stage).
-
Format: This format is available for bulk data transmission stage only.
The leading code (0x55,0xAA) will replace function code to indicate a Bulk Data Transmission beginning and then the value be set into length byte is indicated how many data byte will comes up in continuously. Notice to set length byte with real data quantity minus 1. -
Protocol:
The illustration to show the standard command stream which ask to write a bulk data transmission to FES4335. The illustration to show the standard command stream which ask to read a bulk data transmission from FES4335.
Commands Table
Please, refer to document “FG875D_Commands Table_vx.pdf”.
Appendix (Tips)
Three steps to show a still images on screen more quickly.
Step1): Converting image to a .bin file:
Due to the FES4335’s Flash-ROM that only accept .bin file of image. Therefore,
providing an utility FG875_BMP_to_Bin.exe that able converts a .BMP image file
into .BIN file.
(Refer to document〝FG875_BMP_to_Bin_manual.pdf〞for detail).
Step2): Loading .bin file to the internal SPI-FlashROM(AMIC A25LQ64).
- Using the function code 0x21 (APIs:FG875D_WriteToSerialROM) to require FES4335 to go into the bulk data transmission stage.
- After the Command success code(0x21) is returned from FES4335, then external MPU be allowed to transmit images according to the protocol description about the bulk data-(write) transmission on section 4-2-2. Refer to figure (2).
- Another way to skip ① & ②:
On PC side, to execute utility software (FG875D_command_encoder.exe) and choose function item (APIs:FG875D_WriteToSerialROM) in selection dialog. After then, the utility software will take care all about communication protocol and uploading image file into SPI-FlashROM.
Regarding to the usage of utility software (FG875D_command_encoder.exe), please refer to document “FG875D_Command_Encoder-UsersMenu.pdf”.
Step3): Using the function code 0x22 (APIs:FG875D_SerialROM_Show_On_Panel) to require FES4335 to display images from internal SPI_FlashROM to an indicated location of panel.
By this way to show image that would be faster than filling display buffer by 8051 MCU bus.
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