AT90S2313-4PI Atmel, AT90S2313-4PI Datasheet - Page 18

• Manufacturer Part Number: AT90S2313-4PI
• Description: IC MCU 2K 4MHZ UART LV IT 20DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S2313-4PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Reset and Interrupt
Handling
18
AT90S2313
The AT90S2313 provides 10 different interrupt sources. These interrupts and the sepa-
rate Reset Vector each have a separate Program Vector in the program memory space.
All the 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 Labels Code
$000
$001
$002
$003
$004
$005
$006
$007
$008
$009
$00a
;
$00b
$00c
$00d
…
10
11
1
2
3
4
5
6
7
8
9
MAIN:
Program Address
…
rjmp RESET
rjmp EXT_INT0
rjmp EXT_INT1
rjmp TIM_CAPT1
rjmp TIM_COMP1
rjmp TIM_OVF1
rjmp TIM_OVF0
rjmp UART_RXC
rjmp UART_DRE
rjmp UART_TXC
rjmp ANA_COMP
ldi r16,low(RAMEND); Main program start
out SPL,r16
<instr>
$00A
$000
$001
$002
$003
$004
$005
$006
$007
$008
$009
…
…
xxx
Source
RESET
INT0
INT1
TIMER1 CAPT1
TIMER1 COMP1
TIMER1 OVF1
TIMER0 OVF0
UART, RX
UART, UDRE
UART, TX
ANA_COMP
Comments
; Reset Handler
; IRQ0 Handler
; IRQ1 Handler
; Timer1 Capture Handler
; Timer1 Compare Handler
; Timer1 Overflow Handler
; Timer0 Overflow Handler
; UART RX Complete Handler
; UDR Empty Handler
; UART TX Complete Handler
; Analog Comparator Handler
Hardware Pin, Power-on Reset and
Watchdog Reset
Interrupt Definition
External Interrupt Request 0
External Interrupt Request 1
Timer/Counter1 Capture Event
Timer/Counter1 Compare Match
Timer/Counter1 Overflow
Timer/Counter0 Overflow
UART, RX Complete
UART Data Register Empty
UART, TX Complete
Analog Comparator
0839I–AVR–06/02