ATTINY28L-4AU Atmel, ATTINY28L-4AU Datasheet - Page 40

• Manufacturer Part Number: ATTINY28L-4AU
• Description: IC MCU AVR 2K FLASH 4MHZ 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY28L-4AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 11
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: ATTINY2x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 32 B
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 11
• Number Of Timers: 1
• 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: 8 bit
• Package: 32TQFP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 4 MHz
• Ram Size: 32 Byte
• Operating Supply Voltage: 3.3|5 V
• For Use With: ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIPATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Ram Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

40
ATtiny28L/V
Figure 31. The Hardware Modulator
Figure 32 to Figure 35 show examples on output from the Modulator. Figure 32 also
shows the timing for the enable setting signal and for the count enable signal to
Timer/Counter0.
Figure 32. Modulation with ONTIM = 3, MCONF = 010.
Note:
Figure 33. Modulation with ONTIM = 5, MCONF = 001
Note:
WM: WRITE MODCR
RM: READ MODCR
RM
8
5
3
/
/
/
WM
SETTING
1. Clock frequency: 455 kHz; modulation frequency: 38 kHz; duty-cycle: 33%
Clock frequency: 455 kHz; modulation frequency: 38 kHz; duty-cycle: 50%
ENABLE
ENABLE
COUNT
CLK
PA2
FROM
PORTA2
CLK
PA2
5
3
5
3
/
/
ENABLE SETTING
MODULATOR
D
MACHINE
STATE
Q
DISABLE
MODUALTOR
COUNT ENABLE
TO TIMER/COUNTER0
1062F–AVR–07/06
0
1
PA2