attiny167-esxz ATMEL Corporation, attiny167-esxz Datasheet - Page 44
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attiny167-esxz
Manufacturer Part Number
attiny167-esxz
Description
8-bit Avr 8-bit Microcontroller Microcontroller With 16k Bytes In-system Programmable Flash And Lin Controller
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY167-ESXZ.pdf
(277 pages)
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5.8.3
5.8.4
5.8.5
5.8.6
5.8.7
44
ATtiny167
Brown-out Detector
Internal Voltage Reference
Internal Current Source
Watchdog Timer
Port Pins
mode. Refer to
configure the Analog 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
49
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
”Internal Voltage Reference” on page 51
Output the internal voltage reference is not needed in the deeper sleep modes. This module
should be turned off to reduce significantly to the total current consumption. Refer to
Analog Miscellaneous Control Register” on page 201
voltage reference output.
The Internal Current Source is not needed in the deeper sleep modes. This module should be
turned off to reduce significantly to the total current consumption. Refer to
Miscellaneous Control Register” on page 182
Source.
If the Watchdog Timer is not needed in the application, the module should be turned off. If the
Watchdog Timer is enabled, it will be enabled in all sleep modes and hence always consume
power. In the deeper sleep modes, this will contribute significantly to the total current consump-
tion. Refer to
Watchdog Timer.
When entering a sleep mode, all port pins should be configured to use minimum power. The
most important is then to ensure that no pins drive resistive loads. In sleep modes where both
the I/O clock (clk
be disabled. This ensures that no power is consumed by the input logic when not needed. In
some cases, the input logic is needed for detecting wake-up conditions, and it will then be
enabled. Refer to the section
for details on which pins are enabled. If the input buffer is enabled and the input signal is left
floating or have an analog signal level close to Vcc/2, the input buffer will use excessive power.
For analog input pins, the digital input buffer should be disabled at all times. An analog signal
level close to Vcc/2 on an input pin can cause significant current even in active mode. Digital
input buffers can be disabled by writing to the Digital Input Disable Registers (DIDR1 and
DIDR0). Refer to
Section 17.11.5 ”DIDR0 – Digital Input Disable Register 0” on page 200
for details on how to configure the Brown-out Detector.
Section 6.3 ”Watchdog Timer” on page 51
Section 18. ”AnaComp - Analog Comparator” on page 202
I/O
Section 17.11.6 ”DIDR1 – Digital Input Disable Register 1” on page 201
) and the ADC clock (clk
Section 9.2.6 ”Digital Input Enable and Sleep Modes” on page 69
for details on the start-up time.
ADC
for details on how to disable the Internal Current
) are stopped, the input buffers of the device will
Section 6.1.5 ”Brown-out Detection” on page
for details on how to disable the internal
for details on how to configure the
for details.
for details on how to
”AMISCR – Analog
7728A–AUTO–07/08
Section 6.2
”AMISCR –
and
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