ATMEGA103-6AI Atmel, ATMEGA103-6AI Datasheet - Page 39

IC MCU 128K 6MHZ A/D IT 64TQFP

ATMEGA103-6AI

Manufacturer Part Number
ATMEGA103-6AI
Description
IC MCU 128K 6MHZ A/D IT 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA103-6AI

Core Processor
AVR
Core Size
8-Bit
Speed
6MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
8-bit Timer/Counters
T/C0 and T/C2
0945I–AVR–02/07
The clock source for Timer/Counter0 prescaler is named PCK0. PCK0 is by default con-
nected to the main system clock CK. Observe that CPU clock frequency can be lower
than the XTAL frequency if the XTAL divider is enabled. By setting the AS0 bit in ASSR,
Timer/Counter0 prescaler is asynchronously clocked from the TOSC1 pin. This enables
use of Timer/Counter0 as a Real Time Clock (RTC). A crystal can be connected
between the TOSC1 and TOSC2 pins to serve as an independent clock source for
Timer/Counter0. This Oscillator is optimized for use with a 32.768 kHz crystal.
Figure 30 shows the block diagram for Timer/Counter0. Figure 31 shows the block dia-
gram for Timer/Counter2.
Figure 30. Timer/Counter0 Block Diagram
8-BIT DATA BUS
8-BIT ASYNCH T/C0 DATA BUS
TIMER INT. MASK
REGISTER (TIMSK)
7
0
TIMER/COUNTER0
(TCNT0)
7
0
8-BIT COMPARATOR
7
0
OUTPUT COMPARE
REGISTER0 (OCR0)
CK
TCK0
ATmega103(L)
T/C0 OVER-
T/C0 COMPARE
FLOW IRQ
MATCH IRQ
TIMER INT. FLAG
T/C0 CONTROL
REGISTER (TIFR)
REGISTER (TCCR0)
T/C CLEAR
T/C CLK SOURCE
CONTROL
UP/DOWN
LOGIC
ASYNCH. STATUS
REGISTER (ASSR)
SYNCH UNIT
PCK0
39

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