Renesas R0K5R8C34DK2HBR, Руководство по эксплуатации оборудования

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R8C/34K Group USB Host Evaluation Board R0K5R8C34DK2HBR
Hardware Instruction Manual
R01AN0649EJ0110 Rev.1.10 Page 18 of 26
Jul 21, 2011
7.5 LCD Module Control (Orange dot line area of Figure 12)
The evaluation board includes an LCD module that is controlled through MCU I/O ports. The LCD module displays 2
lines of 8 characters each; this is a character type module with the character font stored in the module. The LCD module
is controlled with 6 pins: a 4-bit data bus and 2 control signals.
Table 8
shows the ports assigned for LCD module
control. Refer to the LCD module data sheet for details concerning access timing, character data, etc.
The evaluation board also employs a semi-fixed resistor (VR1) for adjusting contrast on the LCD module (shown as
Figure 13). Use this to adjust contrast as needed.
Table 8 LCD Module Control Pin and Corresponding I/O Port Name
LCD Module Pin Corresponding I/O Port Name
D7 P03
D6 P02
D5 P01
D4 P00
RS P13
E P12
Figure 13 semi-fixed resistor (VR1)
7.6 Reset Switch (Orange dot line area of Figure 12)
The evaluation board is equipped with the reset switch. The signal of the evaluation board reset switch is coupled with
the reset signal from E8a and connected to the MCU reset pin.
7.7 Oscillator Circuit (Blue dot line area of Figure 12)
The evaluation board is equipped with a crystal oscillation circuit required for the MCU built-in USB function. Make
sure the board is set to use the crystal oscillation circuit before using the USB function. For details concerning usage,
refer to the R8C/34U Group, R8C/34K Group User’s Manual: Hardware.