ATTINY25V-15ST Atmel, ATTINY25V-15ST Datasheet - Page 45

• Manufacturer Part Number: ATTINY25V-15ST
• Description: MCU AVR 2K FLASH 4MHZ 8-SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY25V-15ST

• Package / Case: 8-SOIC (3.9mm Width)
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 8MHz
• Number Of I /o: 6
• Eeprom Size: 128 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Program Memory Size: 2KB (2K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Processor Series: ATTINY2x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.10.2
9. Interrupts
9.1
7598H–AVR–07/09
Interrupt Vectors in ATtiny25/45/85
Safety Level 2
In this mode, the Watchdog Timer is always enabled, and the WDE bit will always read as one. A
timed sequence is needed when changing the Watchdog Time-out period. To change the
Watchdog Time-out, the following procedure must be followed:
This section describes the specifics of the interrupt handling as performed in ATtiny25/45/85.
For a general explanation of the AVR interrupt handling, refer to
on page
Table 9-1.
1. In the same operation, write a logical one to WDCE and WDE. Even though the WDE
2. Within the next four clock cycles, in the same operation, write the WDP bits as desired,
Vector
No.
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
always is set, the WDE must be written to one to start the timed sequence.
but with the WDCE bit cleared. The value written to the WDE bit is irrelevant.
11.
Program
Address
0x000A
0x000B
0x000C
0x000D
0x000E
0x0000
0x0001
0x0002
0x0003
0x0004
0x0005
0x0006
0x0007
0x0008
0x0009
Reset and Interrupt Vectors
RESET
TIM1_COMPA
ANA_COMP
TIM0_COMPA
WDT
Source
INT0
PCINT0
TIM1_OVF
TIM0_OVF
EE_RDY
ADC
TIM1_COMPB
TIM0_COMPB
USI_START
USI_OVF
Interrupt Definition
External Pin, Power-on Reset, Brown-out Reset,
Watchdog Reset
External Interrupt Request 0
Pin Change Interrupt Request 0
Timer/Counter1 Compare Match A
Timer/Counter1 Overflow
Timer/Counter0 Overflow
EEPROM Ready
Analog Comparator
ADC Conversion Complete
Timer/Counter1 Compare Match B
Timer/Counter0 Compare Match A
Timer/Counter0 Compare Match B
Watchdog Time-out
USI START
USI Overflow
“Reset and Interrupt Handling”
ATtiny25/45/85
45