ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 39
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ATtiny43U
Manufacturer Part Number
ATtiny43U
Description
Manufacturer
Atmel Corporation
Specifications of ATtiny43U
Flash (kbytes)
4 Kbytes
Pin Count
20
Max. Operating Frequency
8 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
16
Ext Interrupts
16
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.25
Eeprom (bytes)
64
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
0.7 to 5.5
Operating Voltage (vcc)
0.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
4
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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8048B–AVR–03/09
Figure 8-4.
When input voltage V
V
falls below V
Figure 8-5
output voltage rises above the power-on threshold the microcontroller is brought on-line and cur-
rent consumption steps up to a level sufficiently high for the converter to remain in Active
Regulated Mode of operation.
Figure 8-5.
Note:
V
V
CC
V
MODE:
CONVERTER:
CCNOM
CCMAX
CCMIN
MCU CORE:
V/A
begins to fall. When converter output voltage, i.e. the supply voltage of the microcontroller,
I
MS
The figure is not to scale. Typically, the switching time (rising voltage) is measured in hundreds of
microseconds and idle time (falling voltage) is measured in seconds.
V
V
BOOST
V
START
illustrates how the boost converter output changes with load current. As converter
V
STOP
ACTIVE, REGULATED
POT
POT
Input and Output Voltages of Boost Converter.
Output Voltage vs. Load Current of Boost Converter.
the MCU will go into reset.
BAT
STOP
RESET
falls below V
STOP
the converter enters Stop Mode and output voltage
V
BAT
LOW CURRENT MODE
ACTIVE
V
ACTIVE
CC
STOP
RESET
REGULATED
I
LOAD
V
CC
t
t
39
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