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Copyright © 2013 Future Technology Devices International Limited

VM800C Datasheet

Version 1.0

Document Reference No.: FT_000844

Clearance No.: FTDI#

345

The VM800C module is intended for direct use into existing applications that require a display.This

module is suitable for interfacing with an external microcontroller that has a SPI Master channel.

The VM800C module PCB comes in 2 types , 3.5 inch as well as a 4.3/5 inch model. The difference

between the 2 models is the flex cable receptical of the LCD. The 3.5 inch LCD uses a 54 pin receptical,

whereas the 4.3/5 inch model uses a 40 pin receptical.

The main functions of the VM800C are as follows:



Micro USB, SPI connector or 2-pin connector for power supply



3.3V regulator : Takes 5V input and outputs 3.3V for on-board circuits



LCD touch screen panel



LCD backlight driver. On board back light driver has over voltage protection (OVP).

Part No

OVP (v)

Backlight drive current

(mA)

VM800C35A-N

34

20

VM800C43A-N

34

32

VM800C35A-D

24

20

VM800C43A-D

24

32

VM800C50A-D

24

32

Table 3-1 LED backlight drive OVP and current



5V tolerant buffers between the SPI master interface and the Slave interface of the FT800

o

SPI timing requirement can be referred to FT800 datasheet. The on board level convert

buffers introduce additional delay. The actual maximum SPI clock frequency depends on

the host system timing and connection cable length to VM800C.



3 stage audio filter and power amplifier



8Ω speaker



Audio line out option

3.2

Physical Descriptions

3.2.1

PCB layout

The VM800C module is 85.6 x 54.1mm, four-layer printed circuit board. Board thickness is

approximately 1.6mm.