ATMEGA8HVA-4TU Atmel, ATMEGA8HVA-4TU Datasheet - Page 84

• Manufacturer Part Number: ATMEGA8HVA-4TU
• Description: MCU AVR 8K FLASH 4MHZ 28-TSOP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8HVA-4TU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 7
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 9 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 28-TSOP
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.7
84
Output Compare Unit
ATmega8HVA/16HVA
cleared by software (writing a logical one to the I/O bit location). For measuring frequency only,
the trigger edge change is not required.
Table 17-3.
Note:
Table 17-4.
The comparator continuously compares the Timer/Counter (TCNTn) with the Output Compare
Registers (OCRnA and OCRnB), and whenever the Timer/Counter equals to the Output Com-
pare Registers, the comparator signals a match. A match will set the Output Compare Flag at
the next timer clock cycle. In 8-bit mode the match can set either the Output Compare Flag
OCFnA or OCFnB, but in 16-bit mode the match can set only the Output Compare Flag OCFnA
as there is only one Output Compare Unit. If the corresponding interrupt is enabled, the Output
Compare Flag generates an Output Compare interrupt. The Output Compare Flag is automati-
cally cleared when the interrupt is executed. Alternatively, the flag can be cleared by software by
writing a logical one to its I/O bit location.
Output Compare unit.
Figure 17-5. Output Compare Unit, Block Diagram
ICS0
ICS1
0
1
0
1
1. See
Timer/Counter0 Input Capture Source (ICS)
Timer/Counter1 Input Capture Source (ICS)
”OSI – Oscillator Sampling Interface” on page 28
Source
ICP00: osi_posedge pin from OSI module
ICP01: Port PC0
Source
ICP10: Battery Protection Interrupt
ICP11: Voltage Regulator Interrupt
OCRnx
=
(8/16-bit Comparator )
DATA BUS
OCFnx (Int.Req.)
Figure 17-5 on page 84
(1)
for details.
TCNTn
shows a block diagram of the
8024A–AVR–04/08