TINY88-15MZ Atmel, TINY88-15MZ Datasheet - Page 36
TINY88-15MZ
Manufacturer Part Number
TINY88-15MZ
Description
MCU AVR 8KB FLASH 12MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.TINY88-15MZ.pdf
(246 pages)
Specifications of TINY88-15MZ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
28
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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7.3
7.3.1
7.3.2
7.3.3
7.3.4
36
Minimizing Power Consumption
ATtiny88 Automotive
Analog to Digital Converter
Analog Comparator
Brown-out Detector
Internal Voltage Reference
When the BOD has been disabled the wake-up time from sleep mode will be the same as the
wake-up time from RESET. This is in order to ensure the BOD is working correctly before the
MCU continues executing code.
BOD disable is controlled by bit 6, BODS (BOD Sleep) in the control register MCUCR, see
“MCUCR – MCU Control Register” on page
Power-Down Mode, while a zero in this bit keeps BOD active. The default setting is zero, i.e.
BOD active.
Writing to the BODS bit is controlled by a timed sequence and an enable bit, see
MCU Control Register” on page
There are several issues to consider when trying to minimize the power consumption in an AVR
controlled system. In general, sleep modes should be used as much as possible, and the sleep
mode should be selected so that as few as possible of the device’s functions are operating. All
functions not needed should be disabled. In particular, the following modules may need special
consideration when trying to achieve the lowest possible power consumption.
If enabled, the ADC will be enabled in all sleep modes. To save power, the ADC should be dis-
abled before entering any sleep mode. When the ADC is turned off and on again, the next
conversion will be an extended conversion. Refer to
for details on ADC operation.
When entering Idle mode, the Analog Comparator should be disabled if not used. When entering
ADC Noise Reduction mode, the Analog Comparator should be disabled. In other sleep modes,
the Analog Comparator is automatically disabled. However, if the Analog Comparator is set up
to use the Internal Voltage Reference as input, the Analog Comparator should be disabled in all
sleep modes. Otherwise, the Internal Voltage Reference will be enabled, independent of sleep
mode. Refer to
Comparator.
If the Brown-out Detector is not needed by the application, this module should be turned off. If
the Brown-out Detector is enabled by the BODLEVEL Fuses, it will be enabled in all sleep
modes, and hence, always consume power. In the deeper sleep modes, this will contribute sig-
nificantly to the total current consumption. Refer to
on how to configure the Brown-out Detector.
The Internal Voltage Reference will be enabled when needed by the Brown-out Detection, the
Analog Comparator or the ADC. If these modules are disabled as described in the sections
above, the internal voltage reference will be disabled and it will not be consuming power. When
turned on again, the user must allow the reference to start up before the output is used. If the
reference is kept on in sleep mode, the output can be used immediately. Refer to
age Reference” on page 43
“Analog Comparator” on page 160
for details on the start-up time.
38.
38. Writing this bit to one turns off the BOD in
“Brown-out Detection” on page 42
for details on how to configure the Analog
“Analog-to-Digital Converter” on page 164
9157B–AVR–01/10
“Internal Volt-
“MCUCR –
for details
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