ATTINY43U-SUR Atmel, ATTINY43U-SUR Datasheet - Page 35
ATTINY43U-SUR
Manufacturer Part Number
ATTINY43U-SUR
Description
MCU AVR 4KB FLASH 8MHZ 20SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY43U-SU.pdf
(182 pages)
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
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7.5.2
8048B–AVR–03/09
PRR – Power Reduction Register
Table 7-2.
• Bit 2 – BODSE: BOD Sleep Enable
BODSE enables setting of BODS control bit, as explained in BODS bit description. BOD disable
is controlled by a timed sequence.
• Bits 7:5 – PRE[2:0]: Prepared Read Enable
These bits are used for prepared read operations. See sections
verter” on page 42
• Bit 4 – Res: Reserved Bit
This bit is reserved and will always read zero.
• Bit 3 – PRTIM1: Power Reduction Timer/Counter1
Writing a logic one to this bit shuts down the Timer/Counter1 module. When the Timer/Counter1
is enabled, operation will continue like before the shutdown.
• Bit 2 – PRTIM0: Power Reduction Timer/Counter0
Writing a logic one to this bit shuts down the Timer/Counter0 module. When the Timer/Counter0
is enabled, operation will continue like before the shutdown.
• Bit 1 – PRUSI: Power Reduction USI
Writing a logic one to this bit shuts down the USI by stopping the clock to the module. When
waking up the USI again, the USI should be re-initialized to ensure proper operation.
• Bit 0 – PRADC: Power Reduction ADC
Writing a logic one to this bit shuts down the ADC. The ADC must be disabled before shut down.
The analog comparator cannot use the ADC input MUX when the ADC is shut down.
Bit
0x00 (0x20)
Read/Write
Initial Value
SM1
0
1
1
Sleep Mode Select
PRE2
R
7
0
and
“ADCSRB – ADC Control and Status Register B” on page
PRE1
SM0
R
6
0
1
0
1
PRE0
R
5
0
Sleep Mode
ADC Noise Reduction
Power-down
Reserved
R
4
–
0
PRTIM1
R/W
3
0
PRTIM0
R/W
2
0
“Software Control of Boost Con-
PRUSI
R/W
1
0
PRADC
R/W
0
0
47.
PRR
35
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