ATMEGA163-8PC Atmel, ATMEGA163-8PC Datasheet - Page 39

• Manufacturer Part Number: ATMEGA163-8PC
• Description: IC AVR MCU 16K A/D 8MHZ 40DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA163-8PC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• 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
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Timer/Counters
Timer/Counter
Prescalers
1142E–AVR–02/03
The ATmega163 provides three general purpose Timer/Counters – two 8-bit T/Cs and
one 16-bit T/C. Timer/Counter2 can optionally be asynchronously clocked from an exter-
nal Oscillator. This Oscillator is optimized for use with a 32.768 kHz watch crystal,
enabling use of Timer/Counter2 as a Real Time Clock (RTC). Timer/Counter0 and
Timer/Counter1 have individual prescaling selection from the same 10-bit prescaler.
Timer/Counter2 has its own prescaler. Both these prescalers can be reset by setting the
corresponding control bits in the Special Functions I/O Register (SFIOR). These
Timer/Counters can either be used as a timer with an internal clock time-base or as a
counter with an external pin connection which triggers the counting.
Figure 30. Prescaler for Timer/Counter0 and Timer/Counter1
For Timer/Counter0 and Timer/Counter1, the four different prescaled selections are:
CK/8, CK/64, CK/256, and CK/1024, where CK is the Oscillator clock. For the two
Timer/Counter0 and Timer/Counter1, CK, external source, and stop can also be
selected as clock sources. Setting the PSR10 bit in SFIOR resets the prescaler. This
allows the user to operate with a predictable prescaler. Note that Timer/Counter1 and
Timer/Counter0 share the same prescaler and a Prescaler Reset will affect both
Timer/Counters.
PSR10
TCK1
Clear
ATmega163(L)
TCK0
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