Rainbow Electronics ATmega162V - Manual (Page 59)

59
ATmega162/V
2513E–AVR–09/03
0x03A ldi r16,low(RAMEND)
0x03B out SPL,r16
0x03C sei ; Enable interrupts
0x03D xxx
... ... ...
When the BOOTRST Fuse is unprogrammed, the boot section size set to 2K bytes and
the IVSEL bit in the GICR Register is set before any interrupts are enabled, the most
typical and general program setup for the Reset and Interrupt Vector Addresses is:
Address Labels Code Comments
0x000 RESET: ldi r16,high(RAMEND) ; Main program start
0x001 out SPH,r16 ; Set Stack Pointer to top of RAM
0x002 ldi r16,low(RAMEND)
0x003 out SPL,r16
0x004 sei ; Enable interrupts
0x005 xxx
;
.org 0x1C02
0x1C02 jmp EXT_INT0 ; IRQ0 Handler
0x1C04 jmp EXT_INT1 ; IRQ1 Handler
... .... .. ;
0x1C36 jmp SPM_RDY ; Store Program Memory Ready Handler
When the BOOTRST Fuse is programmed and the boot section size set to 2K bytes, the
most typical and general program setup for the Reset and Interrupt Vector Addresses is:
Address Labels Code Comments
.org 0x002
0x002 jmp EXT_INT0 ; IRQ0 Handler
0x004 jmp EXT_INT1 ; IRQ1 Handler
... .... .. ;
0x036 jmp SPM_RDY ; Store Program Memory Ready Handler
;
.org 0x1C00
0x1C00 RESET: ldi r16,high(RAMEND) ; Main program start
0x1C01 out SPH,r16 ; Set Stack Pointer to top of RAM
0x1C02 ldi r16,low(RAMEND)
0x1C03 out SPL,r16
0x1C04 sei ; Enable interrupts
0x1C05 xxx