P0307 Terasic Technologies Inc, P0307 Datasheet - Page 10

• Manufacturer Part Number: P0307
• Description: KIT DEV 4.3" LCD TOUCH PANEL
• Manufacturer: Terasic Technologies Inc

Specifications of P0307

• Accessory Type: NTSC/PAL TV Player
• For Use With/related Products: DE2, DE1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TRDB_LTM

3
Chapter
This section will describe how to control the register value of the LCD driver IC on the LTM.
The LCD and touch panel module on the LTM is equipped with a LCD driver IC to support three
display resolution and with functions of source driver, serial port interface, timing controller, and
power supply circuits. To control these functions, users can use FPGA to configure the registers in
the LCD driver IC via serial port interface.
Also, there is an analog to digital converter (ADC) on the LTM to convert the analog X/Y coordinates
of the touch point to digital data and output to FPGA through the serial port interface of the ADC.
Both LCD driver IC and ADC serial port interfaces are connected to the FPGA via the 40-pin
expansion header and IDE cable.
Because of the limited number of I/O on the expansion header, the serial interfaces of the LCD
driver IC and ADC need to share the same clock (ADC_DCLK) and chip enable (SCEN) signal I/O
on the expansion header. To avoid both the serial port interfaces may interfere with each other when
sharing the same clock and chip enable signals, the chip enable signal (CS), which is inputted into
the ADC will come up with a logic inverter. Users need to pay attention controlling the shared
signals when designing the serial port interface controller. The detailed register maps of the LCD
driver IC are listed in appendix chapter. The specifications of the serial port interface of the LCD
driver IC are described below.
enable instruction setting. Please notice that in addition to the serial port interface signals, NCLK
input should also be provided while setting the registers. Figure 3.1 and Table 3.1 show the frame
format and timing diagram of the serial port interface. The LCD driver IC recognizes the start of data
The LCD driver IC supports a clock synchronous serial interface as the interface to a FPGA to
3-1 The Serial Port Interface of the LCD Driver IC
This chapter illustrates how to use the LTM including how to control the serial port
interface of the LCD driver IC and AD converter. Also, the timing requirement of
the synchronous signal and RGB data which are outputted to the LCD panel
module will be described.
Using the LTM
8
Chapter 3
Using the LTM