Renesas RX230, Manual

Page: 7 / 25

RX230 Group, RX231 Group Initial Settings and Usage Procedure of RTC Battery Backup Function
R01AN4831EJ0100 Rev.1.00 Page 7 of 23
Aug.20.19
1.2 Operating Environment
Table 1.2, Operating Environment, shows the environment in which the operation of the sample program was
confirmed.
Table 1.2 Operating Environment
Item Description
MCU used R5F52318ADFP (RX231 Group)
Board used Renesas Starter Kit for RX231 (product number: R0K505231S000BE)
CPU operating frequency Refer to 2.3, Clock Settings.
Integrated development
environment Renesas Electronics
e
2
studio Version 7.5.0
C compiler Renesas Electronics
C/C++ Compiler Package for RX Family V.3.01.00
Emulator E1
Endian order Little-endian
The sample program uses FIT modules to control battery backup function and programming of the flash
memory. LCD display software uses the sample code provided with the RSK board, and the drivers of other
functions than battery backup and flash programming are generated using Smart Configurator (SC). Note
that in the sample program, R_Config_RTC_Create function call, which is generated for RTC battery backup
operation by SC, r_cg_hardware_setup.c file is deleted.
void R_Systeminit(void)
{
/* Enable writing to registers related to operating modes, LPC, CGC and
software reset */
SYSTEM.PRCR.WORD = 0xA50FU;
/* Enable writing to MPC pin function control registers */
MPC.PWPR.BIT.B0WI = 0U;
MPC.PWPR.BIT.PFSWE = 1U;
/* Initialize clocks settings */
R_CGC_Create();
/* Set peripheral settings */
R_Config_PORT_Create();
R_Config_CMT0_Create();
R_Config_LVD1_Create();
R_Config_SCI8_Create();
R_Config_RTC_Create();
← Deleted.
Figure 1.3 Modification of r_cg_hardware_setup.c