Table of Contents
Advertisement
RX230 Group, RX231 Group
Contents
1.
Overview ................................................................................................................................. 4
1.1
About this Application Note ..................................................................................................................... 4
1.2
Operating Environment ........................................................................................................................... 7
2.
Hardware ................................................................................................................................. 9
2.1
Overview of Renesas Starter Kit for RX231 (RSK) ................................................................................. 9
2.2
Pins Used ................................................................................................................................................ 9
2.3
Clock Settings ........................................................................................................................................ 10
2.4
LCD Panel ............................................................................................................................................. 10
2.5
Hardware Modifications ......................................................................................................................... 10
2.5.1
VBATT Connection .............................................................................................................................. 10
2.5.2
RTCIC1 Input ....................................................................................................................................... 11
3.
Software ................................................................................................................................ 12
3.1
FIT Modules ........................................................................................................................................... 12
3.2
SC Components .................................................................................................................................... 12
3.3
File Composition .................................................................................................................................... 12
3.4
Option-Setting Memory Settings ........................................................................................................... 12
3.5
Constants .............................................................................................................................................. 13
3.6
Variables ................................................................................................................................................ 13
3.7
Functions Used ...................................................................................................................................... 13
3.8
Function Specifications ......................................................................................................................... 14
3.8.1
main ..................................................................................................................................................... 14
3.8.2
flash_Init .............................................................................................................................................. 14
3.8.3
display_time ......................................................................................................................................... 14
3.8.4
display_info .......................................................................................................................................... 15
3.8.5
backup_time ........................................................................................................................................ 15
4.
Flowcharts ............................................................................................................................. 16
4.1
main Function: main() ............................................................................................................................ 16
4.2
Erase Data Flash Function: flash_Init () ................................................................................................ 17
4.3
Display Time Information Function: display_time() ............................................................................... 17
4.4
Battery Status and Switch Push Count Display Function: display_time() ............................................. 18
4.5
Save Time Information Function: backup_time() .................................................................................. 19
5.
LCD Display and RTC Input Capture Operation ..................................................................... 20
5.1
LCD Display ........................................................................................................................................... 20
5.1.1
Execution During Battery Backup Operation ....................................................................................... 20
5.1.2
Battery Backup Operation Disruption .................................................................................................. 21
5.2
RTC Input Capture Operation ............................................................................................................... 22
R01AN4831EJ0100 Rev.1.00
Aug.20.19
Initial Settings and Usage Procedure of RTC Battery Backup Function
Page 2 of 23
Advertisement
Table of Contents
