参数资料
型号: AT90S8515-8PC
厂商: Atmel
文件页数: 28/112页
文件大小: 0K
描述: IC MCU 8K FLSH 8MHZ 40DIP
标准包装: 18
系列: AVR® 90S
核心处理器: AVR
芯体尺寸: 8-位
速度: 8MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 8KB(4K x 16)
程序存储器类型: 闪存
EEPROM 大小: 512 x 8
RAM 容量: 512 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
22
AT90S8515
0841G–09/01
Reset and Interrupt
Handling
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.
The most typical and general program setup for the Reset and Interrupt vector
addresses are:
Address
Labels
Code
Comments
$000
rjmp
RESET
; Reset Handler
$001
rjmp
EXT_INT0
; IRQ0 Handler
$002
rjmp
EXT_INT1
; IRQ1 Handler
$003
rjmp
TIM1_CAPT
; Timer1 Capture Handler
$004
rjmp
TIM1_COMPA
; Timer1 CompareA Handler
$005
rjmp
TIM1_COMPB
; Timer1 CompareB Handler
$006
rjmp
TIM1_OVF
; Timer1 Overflow Handler
$007
rjmp
TIM0_OVF
; Timer0 Overflow Handler
$008
rjmp
SPI_STC
; SPI Transfer Complete Handler
$009
rjmp
UART_RXC
; UART RX Complete Handler
$00a
rjmp
UART_DRE
; UDR Empty Handler
$00b
rjmp
UART_TXC
; UART TX Complete Handler
$00c
rjmp
ANA_COMP
; Analog Comparator Handler
;
$00d
MAIN:
ldi r16,high(RAMEND); Main program start
$00e
out SPH,r16
Table 2. Reset and Interrupt Vectors
Vector No.
Program
Address
Source
Interrupt Definition
1
$000
RESET
External Reset, Power-on Reset and
Watchdog Reset
2
$001
INT0
External Interrupt Request 0
3
$002
INT1
External Interrupt Request 1
4
$003
TIMER1 CAPT
Timer/Counter1 Capture Event
5
$004
TIMER1 COMPA
Timer/Counter1 Compare Match A
6
$005
TIMER1 COMPB
Timer/Counter1 Compare Match B
7
$006
TIMER1 OVF
Timer/Counter1 Overflow
8
$007
TIMER0, OVF
Timer/Counter0 Overflow
9
$008
SPI, STC
Serial Transfer Complete
10
$009
UART, RX
UART, Rx Complete
11
$00A
UART, UDRE
UART Data Register Empty
12
$00B
UART, TX
UART, Tx Complete
13
$00C
ANA_COMP
Analog Comparator
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