ATMEGA103-6AI Atmel, ATMEGA103-6AI Datasheet - Page 42

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

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

Timer/Counter0 – TCNT0
Timer/Counter2 – TCNT2
42
ATmega103(L)
In PWM mode, this bit has no effect.
• Bits 2, 1, 0 – CS02, CS01, CS00/CS22, CS21, CS20: Clock Select Bits 2, 1 and 0
The Clock Select2 bits 2, 1 and 0 define the prescaling source of the Timer/Counter.
Table 11. Timer/Counter0 Prescale Select
Table 12. Timer/Counter2 Prescale Select
The Stop condition provides a Timer Enable/Disable function. The CK down divided
modes are scaled directly from the CK CPU clock. If the external pin modes are used for
Timer/Counter2, transitions on PD7/(T2) will clock the counter even if the pin is config-
ured as an output. This feature can give the user software control of the counting.
Bit
$32 ($42)
Read/Write
Initial Value
Bit
$24 ($44)
Read/Write
Initial Value
CS02
CS22
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CS01
CS21
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
MSB
MSB
R/W
R/W
7
0
7
0
CS00
CS20
R/W
R/W
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
6
0
6
0
Description
Timer/Counter0 is stopped.
PCK0
PCK0/8
PCK0/32
PCK0/64
PCK0/128
PCK0/256
PCK0/1024
Description
Timer/Counter2 is stopped.
CK
CK/8
CK/64
CK/256
CK/1024
External Pin PD7(T2), falling edge
External Pin PD7(T2), rising edge
R/W
R/W
5
0
5
0
R/W
R/W
4
0
4
0
R/W
R/W
3
0
3
0
R/W
R/W
2
0
2
0
R/W
R/W
1
0
1
0
LSB
R/W
LSB
R/W
0
0
0
0
0945I–AVR–02/07
TCNT0
TCNT2