ATMEGA128-16AU Atmel, ATMEGA128-16AU Datasheet - Page 103

• Manufacturer Part Number: ATMEGA128-16AU
• Description: IC AVR MCU 128K 16MHZ 5V 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128-16AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• 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): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: 2-Wire, JTAG, SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 4
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Controller Family/series: AVR MEGA
• No. Of I/o's: 53
• Eeprom Memory Size: 4096Byte
• Ram Memory Size: 4KB
• Cpu Speed: 16MHz
• Rohs Compliant: Yes
• For Use With: ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEMATSTK501 - ADAPTER KIT FOR 64PIN AVR MCUATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Timer/Counter Register –
TCNT0
Output Compare Register –
OCR0
2467M–AVR–11/04
Table 55. Compare Output Mode, Phase Correct PWM Mode
Note:
• Bit 2:0 – CS02:0: Clock Select
The three clock select bits select the clock source to be used by the Timer/Counter, see
Table 56.
Table 56. Clock Select Bit Description
The Timer/Counter Register gives direct access, both for read and write operations, to
the Timer/Counter unit 8-bit counter. Writing to the TCNT0 Register blocks (removes)
the compare match on the following timer clock. Modifying the counter (TCNT0) while
the counter is running, introduces a risk of missing a compare match between TCNT0
and the OCR0 Register.
The Output Compare Register contains an 8-bit value that is continuously compared
with the counter value (TCNT0). A match can be used to generate an output compare
interrupt, or to generate a waveform output on the OC0 pin.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
COM01
CS02
0
0
1
1
0
0
0
0
1
1
1
1
1. A special case occurs when OCR0 equals TOP and COM01 is set. In this case, the
COM00
compare match is ignored, but the set or clear is done at TOP. See “Phase Correct
PWM Mode” on page 98 for more details.
CS01
0
1
0
1
R/W
R/W
0
0
1
1
0
0
1
1
7
0
7
0
Description
Normal port operation, OC0 disconnected.
Reserved
Clear OC0 on compare match when up-counting. Set OC0 on compare
match when downcounting.
Set OC0 on compare match when up-counting. Clear OC0 on compare
match when downcounting.
R/W
R/W
6
0
6
0
CS00
0
1
0
1
0
1
0
1
R/W
R/W
5
0
5
0
Description
No clock source (Timer/Counter stopped)
clk
clk
clk
clk
clk
clk
clk
T
T
T0S
T0S
T0S
T0S
T0S
0
0
S
S
/256 (From prescaler)
/1024 (From prescaler)
R/W
R/W
/(No prescaling)
/8 (From prescaler)
/32 (From prescaler)
/64 (From prescaler)
/128 (From prescaler)
4
0
4
0
TCNT0[7:0]
OCR0[7:0]
R/W
R/W
3
0
3
0
R/W
R/W
2
0
2
0
(1)
R/W
R/W
ATmega128
1
0
1
0
R/W
R/W
0
0
0
0
TCNT0
OCR0
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