AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 55
AT90PWM81
Manufacturer Part Number
AT90PWM81
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT90PWM161.pdf
(325 pages)
Specifications of AT90PWM81
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
20
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.25
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
1
Output Compare Channels
8
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
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Manufacturer:
Atmel
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3 118
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Manufacturer:
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2 446
Company:
Part Number:
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Manufacturer:
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1 500
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7.3.2
7.4
7734P–AVR–08/10
Watchdog Timer
Voltage Reference Characteristics
DAC is used. To reduce power consumption in Power-down mode, the user can avoid the four conditions
above to ensure that the reference is turned off before entering Power-down mode.
Table 7-4.
Note:
AT90PWM81 has an Enhanced Watchdog Timer (WDT). The main features are:
•
•
•
•
Figure 7-7.
The Watchdog Timer (WDT) is a timer counting cycles of a separate on-chip 128 kHz oscillator. The
WDT gives an interrupt or a system reset when the counter reaches a given time-out value. In normal
operation mode, it is required that the system uses the WDR - Watchdog Timer Reset - instruction to
restart the counter before the time-out value is reached. If the system doesn't restart the counter, an inter-
rupt or system reset will be issued.
Clocked from separate On-chip Oscillator
3 Operating modes
Selectable Time-out period from 1ms to 8s
Possible Hardware fuse Watchdog always on (WDTON) for fail-safe mode
Symbol
V
I
– Interrupt
– System Reset
– Interrupt and System Reset
t
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
Watchdog Timer
OSCILLATOR
128 KHz
WDP3
WDIF
WDIE
Condition
(1)
Min.
INTERRUPT
MCU RESET
Typ.
AT90PWM81
1.1
40
15
Max.
Units
µA
µs
V
55
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