RX62N Datasheet, PDF (12/25 Pages) Renesas Technology Corp – 100 MHz 32-bit RX MCU with FPU, 165 DMIPS, up to 512-Kbyte Flash, Ethernet, USB 2.0

RX62N Group and RX621 Group
5. Software Documentation
5.1 Symbolic Constants
16-Bit SDRAM Connection and Access Examples
Table 7 Symbolic Constants
Constant Name
sdram_top
Setting Value
0x08000000
sdram_end
0x09000000
Contents
SDRAM (32bit) SDRAM (32 bits) start
address
SDRAM (32bit) SDRAM (32 bits) end
address
Function Used
main
main
5.2 RAM Variables
Table 8 RAM Variables
Type
Unsigned long
Unsigned long
Unsigned long
Variable Name
sdram_adr
sdram_data
sdram_cmp_data
Contents
SDRAM (32 bits) address pointer
SDRAM (32 bits) data variable
SDRAM (32 bits) comparison data
Function Used
main
main
main
5.3 Functions
Table 9 Functions
Function Name
PowerON_Reset_PC
Main
Init
Err
Outline
Initialization function
Sets INTB, FPSW, and PSW, changes the processor mode, and
calls the function main().
Main function
Calls the function init(), performs program operations (reads and
writes to SDRAM), and calls the function err().
MCU initialization function
Sets up various registers.
Error function
Performs SDRAM data compare check error handling.
R01AN0585EJ0202 Rev.2.02
Feb 14, 2014
Page 12 of 22