Renesas R8C/25 6.4. Serial port , 6.5. LCD Module

6.4. Serial port

The microcontroller programming serial port 1 is connected to the RS232 transceiver. This serial port can optionally be connected to the

RS232 transceiver as well by fitting option resistors. The connections to be fitted are listed in the table 6-3.

Description Function Fit for RS232

TxD1 Programming Serial Port R45

RxD1 Programming Serial Port R46

Table 6-3: Serial Port settings

A Secondary serial port is connected to the application headers. This is shared with the LIN module.

A LCD module is supplied to be connected to the connector J8. This should be fitted so that the LCD module lies over J1. Care s hou ld be

taken to ensure the pins are inserted correctly into J8.The LCD module uses a 4 bit interface to reduce the pin allocation. No contrast

control is provided; this is set by a resistor on the supplied display module. The module supplied with the RSK only supports 5V operation.

Table 6-4 shows the pin allocation and signal names used on this connector.

Pin Circuit Net Name Device

1 Ground - 2 5V Only -

3 No Connection - 4 LCD_RS 31

5 R/W (Wired to Write only) - 6 LCD_E 30

7 No Connection - 8 No Connection -

9 No Connection - 10 No Connection -

11 LCD_D4 51 12 LCD_D5 50

13 LCD_D6 49 14 LCD_D7 48

Table 6-4: LCD Module Connections