AT90PWM2-16SQ Atmel, AT90PWM2-16SQ Datasheet - Page 50
![IC AVR MCU FLASH 8K 24SOIC](/photos/6/70/67046/453-24-soic_sml.jpg)
AT90PWM2-16SQ
Manufacturer Part Number
AT90PWM2-16SQ
Description
IC AVR MCU FLASH 8K 24SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM3B-16SU.pdf
(361 pages)
Specifications of AT90PWM2-16SQ
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
19
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 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
24-SOIC (7.5mm Width)
Processor Series
AT90PWMx
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
19
Number Of Timers
2
Operating Supply Voltage
2.7 V to 5.5 V
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, 8 Channel
On-chip Dac
10 bit, 1 Channel
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOICATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2ATSTK520 - ADAPTER KIT FOR 90PWM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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9.1
9.1.1
9.1.2
9.2
50
Internal Voltage Reference
Watchdog Timer
AT90PWM2/3/2B/3B
Voltage Reference Enable Signals and Start-up Time
Voltage Reference Characteristics
This bit is set if an External Reset occurs. The bit is reset by a Power-on Reset, or by writing a
logic zero to the flag.
• Bit 0 – PORF: Power-on Reset Flag
This bit is set if a Power-on Reset occurs. The bit is reset only by writing a logic zero to the flag.
To make use of the Reset flags to identify a reset condition, the user should read and then reset
the MCUSR as early as possible in the program. If the register is cleared before another reset
occurs, the source of the reset can be found by examining the reset flags.
AT90PWM2/2B/3/3B features an internal bandgap reference (1.1V). This reference is used for
Brown-out Detection.
a voltage reference for the DAC and/or the ADC, and can also be used as analog input for the
analog comparators. In order to use the internal Vref, it is necessary to configure it thanks to the
REFS1 and REFS0 bits in the ADMUX register and to set an analog feature which requires it.
The voltage reference has a start-up time that may influence the way it should be used. The
start-up time is given in
reference is on during the following situations:
1. When the BOD is enabled (by programming the BODLEVEL [2..0] Fuse).
2. When the bandgap reference is connected to the Analog Comparator (by setting the
3. When the ADC is enabled.
4. When the DAC is enabled.
Thus, when the BOD is not enabled, after setting the ACBG bit or enabling the ADC or the DAC,
the user must always allow the reference to start up before the output from the Analog Compar-
ator or ADC or DAC is used. To reduce power consumption in Power-down mode, the user can
avoid the three conditions above to ensure that the reference is turned off before entering
Power-down mode.
Table 9-4.
Note:
AT90PWM2/2B/3/3B has an Enhanced Watchdog Timer (WDT). The main features are:
•
•
Symbol
Clocked from separate On-chip Oscillator
3 Operating modes
V
ACBG bit in ACSR).
– Interrupt
– System Reset
t
I
BG
BG
BG
1. Values are guidelines only.
Parameter
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current
consumption
Internal Voltage Reference Characteristics
A 2.56V voltage reference is generated thanks to the bandgap
Table
9-4. To save power, the reference is not always turned on. The
Condition
(1)
Min.
Typ.
1.1
40
15
, i
t
Max.
can be used as
4317J–AVR–08/10
Units
µA
µs
V
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