ATMEGA8-16AC Atmel, ATMEGA8-16AC Datasheet - Page 86

• Manufacturer Part Number: ATMEGA8-16AC
• Description: IC AVR MCU 8K 16MHZ COM 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8-16AC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: ATMEGA816AC

86
ATmega8(L)
Figure 36. Compare Match Output Unit, Schematic
The general I/O port function is overridden by the Output Compare (OC1x) from the waveform
generator if either of the COM1x1:0 bits are set. However, the OC1x pin direction (input or out-
put) is still controlled by the Data Direction Register (DDR) for the port pin. The Data Direction
Register bit for the OC1x pin (DDR_OC1x) must be set as output before the OC1x value is visi-
ble on the pin. The port override function is generally independent of the Waveform Generation
mode, but there are some exceptions. Refer to
Table 38 on page 97
The design of the Output Compare Pin logic allows initialization of the OC1x state before the
output is enabled. Note that some COM1x1:0 bit settings are reserved for certain modes of oper-
ation.
The COM1x1:0 bits have no effect on the Input Capture unit.
See “16-bit Timer/Counter Register Description” on page 96.
COMnx1
COMnx0
FOCnx
clk
for details.
I/O
Waveform
Generator
D
D
D
PORT
Table 36 on page
DDR
OCnx
Q
Q
Q
1
0
96,
Table 37 on page 96
OCnx
Pin
2486Z–AVR–02/11
and