AT90PWM3B-16MU Atmel, AT90PWM3B-16MU Datasheet - Page 134

• Manufacturer Part Number: AT90PWM3B-16MU
• Description: IC MCU AVR RISC 8K FLASH 32-QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM3B-16MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 27
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-QFN
• Package: 32QFN EP
• Device Core: AVR
• Family Name: 90P
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 27
• Interface Type: SPI/USART
• On-chip Adc: 11-chx10-bit
• Number Of Timers: 2
• Processor Series: AT90PWMx
• Core: AVR8
• Data Ram Size: 512 B
• Maximum Clock Frequency: 16 MHz
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRFBKIT, ATAVRISP2
• Minimum Operating Temperature: - 40 C
• On-chip Dac: 10 bit, 1 Channel
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRMC200 - KIT EVAL FOR AT90PWM3 ASYNCATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK520 - ADAPTER KIT FOR 90PWM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.5
16.5.1
134
Functional Description
AT90PWM2/3/2B/3B
Waveform Cycles
The waveform generated by PSC can be described as a sequence of two waveforms.
The first waveform is relative to PSCOUTn0 output and part A of PSC. The part of this waveform
is sub-cycle A in the following figure.
The second waveform is relative to PSCOUTn1 output and part B of PSC. The part of this wave-
form is sub-cycle B in the following figure.
The complete waveform is ended with the end of sub-cycle B. It means at the end of waveform
B.
Figure 16-4. Cycle Presentation in 1, 2 & 4 Ramp Mode
Figure 16-5. Cycle Presentation in Centered Mode
Ramps illustrate the output of the PSC counter included in the waveform generators. Centered
Mode is like a one ramp mode which count down up and down.
Notice that the update of a new set of values is done regardless of ramp Mode at the top of the
last ramp.
4 Ramp Mode
2 Ramp Mode
1 Ramp Mode
Centered Mode
Ramp A0
Sub-Cycle A
Ramp A
Ramp A1
PSC Cycle
Ramp B0
Sub-Cycle B
Ramp B
Ramp B1
PSC Cycle
UPDATE
UPDATE
4317J–AVR–08/10