ATMEGA161-8PI Atmel, ATMEGA161-8PI Datasheet - Page 40

• Manufacturer Part Number: ATMEGA161-8PI
• Description: IC AVR MCU 16K 8MHZ IND 40-DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA161-8PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: ATMEGA1618PI

8-bit Timer/Counters
T/C0 and T/C2
40
ATmega161(L)
• Bit 0
When this bit is set (one), the Timer/Counter1 and Timer/Counter0 prescaler will be
reset. The bit will be cleared by hardware after the operation is performed. Writing a
zero to this bit will have no effect. Note that Timer/Counter1 and Timer/Counter0 share
the same prescaler and a reset of this prescaler will affect both timers. This bit will
always be read as zero.
Figure 31 shows the block diagram for Timer/Counter0. Figure 32 shows the block dia-
gram for Timer/Counter2.
Figure 31. Timer/Counter0 Block Diagram
–
PSR10: Prescaler Reset Timer/Counter1 and Timer/Counter0
7
7
7
TIMER/COUNTER0
8-BIT COMPARATOR
OUTPUT COMPARE
REGISTER0 (OCR0)
REGISTER (TIMSK)
TIMER INT. MASK
(TCNT0)
0
0
0
T/C0 OVER-
FLOW IRQ
T/C CLEAR
T/C CLK SOURCE
UP/DOWN
REGISTER (TIFR)
TIMER INT. FLAG
T/C0 COMPARE
MATCH IRQ
REGISTER (TCCR0)
T/C0 CONTROL
CONTROL
LOGIC
SPECIAL FUNCTIONS
IO REGISTER (SFIOR)
1228D–AVR–02/07
CK
T0