ATTINY43U-SUR Atmel, ATTINY43U-SUR Datasheet - Page 39

• Manufacturer Part Number: ATTINY43U-SUR
• Description: MCU AVR 4KB FLASH 8MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY43U-SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
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