AT90S8515A-8JC Atmel, AT90S8515A-8JC Datasheet - Page 22

• Manufacturer Part Number: AT90S8515A-8JC
• Description: IC MCU 8K FLSH 8MHZ 44PLCC
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S8515A-8JC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Reset and Interrupt
Handling
22
AT90S8515
The AT90S8515 provides 12 different interrupt sources. These interrupts and the sepa-
rate reset vector each have a separate program vector in the program memory space.
All interrupts are assigned individual enable bits that must be set (one) together with the
I-bit in the Status Register in order to enable the interrupt.
The lowest addresses in the program memory space are automatically defined as the
Reset and Interrupt vectors. The complete list of vectors is shown in Table 2. The list
also determines the priority levels of the different interrupts. The lower the address, the
higher the priority level. RESET has the highest priority, and next is INT0 (the External
Interrupt Request 0), etc.
Table 2. Reset and Interrupt Vectors
The most typical and general program setup for the Reset and Interrupt vector
addresses are:
Vector No.
Address
$000
$001
$002
$003
$004
$005
$006
$007
$008
$009
$00a
$00b
$00c
;
$00d
$00e
10
11
12
13
1
2
3
4
5
6
7
8
9
Labels
MAIN:
Program
Address
$00A
$00B
$00C
$000
$001
$002
$003
$004
$005
$006
$007
$008
$009
RESET
TIMER1 CAPT
TIMER1 COMPA
TIMER1 COMPB
TIMER1 OVF
TIMER0, OVF
SPI, STC
UART, TX
Source
INT0
INT1
UART, RX
UART, UDRE
ANA_COMP
Code
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
rjmp
ldi r16,high(RAMEND); Main program start
out SPH,r16
RESET
EXT_INT0
EXT_INT1
TIM1_CAPT
TIM1_COMPA
TIM1_COMPB
TIM1_OVF
TIM0_OVF
SPI_STC
UART_RXC
UART_DRE
UART_TXC
ANA_COMP
Interrupt Definition
External Reset, Power-on Reset and
Watchdog Reset
External Interrupt Request 0
External Interrupt Request 1
Timer/Counter1 Capture Event
Timer/Counter1 Compare Match A
Timer/Counter1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter0 Overflow
Serial Transfer Complete
UART, Rx Complete
UART Data Register Empty
UART, Tx Complete
Analog Comparator
Comments
; Reset Handler
; IRQ0 Handler
; IRQ1 Handler
; Timer1 Capture Handler
; Timer1 CompareA Handler
; Timer1 CompareB Handler
; Timer0 Overflow Handler
; SPI Transfer Complete Handler
; UART RX Complete Handler
; UDR Empty Handler
; UART TX Complete Handler
; Analog Comparator Handler
; Timer1 Overflow Handler
0841G–09/01