AT90PWM316-16MU Atmel, AT90PWM316-16MU Datasheet - Page 143

• Manufacturer Part Number: AT90PWM316-16MU
• Description: MCU AVR 16K FLASH 16MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM316-16MU

• 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: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K 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
• Processor Series: AT90PWMx
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 2
• 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 Adc: 10 bit, 11 Channel
• Cpu Family: 90P
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Total Internal Ram Size: 1KB
• # I/os (max): 53
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Package Type: QFN EP
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOICATAVRMC200 - KIT EVAL FOR AT90PWM3 ASYNCATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.7.1
7710E–AVR–08/10
Frequency distribution
The frequency modulation is done by switching two frequencies in a 16 consecutive cycle frame.
These two frequencies are f
frequency and f
in the frame is (d-16) and the number of f
uted in the frame according to a predefined pattern. This pattern can be as given in the following
table or by any other implementation which give an equivallent evenly distribution.
Table 16-5.
While ‘X’ in the table, f
So for each row, a number of fb2 take place of fb1.
Figure 16-12. Resulting Frequency versus d.
Distribution of fb2 in the modulated frame
Fraction
al
Divider
(d)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
d:
f
b1
0
PWM - cycle
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
Distribution of f
b2
2
1
X
X
X
X
X
X
X
is the nearest base frequency below the wanted frequency. The number of f
3
2
X
X
X
X
X
X
X
X
X
X
X
b2
4
prime to f
3
X
X
X
b1
b2
5
and f
in the modulated frame
4
X
X
X
X
X
X
X
X
X
X
X
X
X
6
b1
b2
in cycle corresponding cycle.
7
where f
5
X
X
X
X
X
8
b2
6
X
X
X
X
X
X
X
X
X
is d. The f
b1
9 10 11 12 13 14 15
is the nearest base frequency above the wanted
7
X
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
b1
and f
9
X
X
X
X
X
X
AT90PWM216/316
b2
frequencies are evenly distrib-
10
X
X
X
X
X
X
X
X
X
X
11
X
X
f
12
X
X
X
X
X
X
X
X
X
X
X
X
b2
13
X
X
X
X
f
OP
14
X
X
X
X
X
X
X
X
15
143
b1