Renesas H8S - Manual (Page 13)

Direct Drive LCD Design Guide
3.
3.1
Typical LCD Panel Connections
This section illustrates typical connections on an LCD panel and how they are interfaced to the MCU in a
Direct Drive configuration.
LCD panel interface
Figure 7 Example Connections for a Kyocera TFT-LCD Panel
3.1.1 Power Supplies
Many panels require multiple supplies. Check your panel’s specification to see how many ground and
different voltage level connections it requires.
In the example case of a Kyocera 320x240 panel, 6x 0v (GND) lines are required, along with 2x +3.3v
reference voltages. In addition, the backlight power supply is also required.
3.1.2 Clock
Often referred to as the Dot Clock, the panel requires a synchronous clock signal to provide logic edges
for clocking in data. The Red-Green-Blue (RGB) parallel data should be present on the data bus at the
time of each rising edge of the clock. This provides the color setting for each individual pixel in turn. Read
more about our specific implementation of the Dot Clock and the associated hardware options in Section 4
3.1.3 HSync
Each period of HSync contains the Dot Clocks and data for each horizontal line on the panel
3.1.4 VSync
Vsync provides synchronization for each packet of valid data in each line of pixels. The total time for the
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