ATTINY20-EK1 Atmel, ATTINY20-EK1 Datasheet - Page 32

• Manufacturer Part Number: ATTINY20-EK1
• Description: KIT EVAL TOUCH ATTINY20
• Manufacturer: Atmel

Specifications of ATTINY20-EK1

• Sensor Type: *
• Sensing Range: *
• Interface: *
• Sensitivity: *
• Voltage - Supply: *
• Embedded: *
• Utilized Ic / Part: *
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: TinyAVR
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Mcu Supported Families: ATtiny20
• Tool / Board Applications: Microcontroller
• Rohs Compliant: Yes
• Tool Type: Development Kit
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Processor To Be Evaluated: ATtiny20
• Interface Type: Touch
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.2.3
8.2.4
32
ATtiny20
Watchdog Reset
Brown-out Detection
Figure 8-4.
When the Watchdog times out, it will generate a short reset pulse. On the falling edge of this
pulse, the delay timer starts counting the time-out period t
ation of the Watchdog Timer and
Figure 8-5.
ATtiny20 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
operation by comparing it to a fixed trigger level. The trigger level for the BOD can be selected
by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free Brown-out
Detection. The hysteresis on the detection level should be interpreted as V
and V
When the BOD is enabled, and V
8-6 on page
trigger level (V
t
The BOD circuit will only detect a drop in V
ger than t
TOUT
has expired.
BOT-
CC
CC
BOD
= V
33), the Brown-out Reset is immediately activated. When V
given in
BOT
External Reset During Operation
Watchdog Reset During Operation
BOT+
- V
in
HYST
“System and Reset Characteristics” on page
Figure
/2.
8-6), the delay counter starts the MCU after the Time-out period
CC
Table 20-4 on page 175
decreases to a value below the trigger level (V
CK
CC
if the voltage stays below the trigger level for lon-
TOUT
for details on reset time-out.
. See
175.
page 32
CC
BOT+
increases above the
for details on oper-
= V
CC
8235B–AVR–04/11
BOT
BOT-
level during
+ V
in
Figure
HYST
/2