ATTINY26-16PI Atmel, ATTINY26-16PI Datasheet - Page 33

• Manufacturer Part Number: ATTINY26-16PI
• Description: IC AVR MCU 2K 16MHZ IND 20-DIP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY26-16PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Power-on Reset
1477K–AVR–08/10
Table 16. Reset Characteristics
Notes:
See start-up times from reset from “System Clock and Clock Options” on page 23. When the
CPU wakes up from Power-down, only the clock counting part of the start-up time is used. The
Watchdog Oscillator is used for timing the real-time part of the start-up time.
A Power-on Reset (POR) pulse is generated by an On-chip Detection circuit. The detection level
is defined in Table 16 The POR is activated whenever V
circuit can be used to trigger the Start-up Reset, as well as detect a failure in supply voltage.
The Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes a delay counter, which determines the delay, for
which the device is kept in RESET after V
be defined by the user through the CKSEL Fuses. The different selections for the delay period
are presented in “System Clock and Clock Options” on page 23. The RESET signal is activated
again, without any delay, when the V
Symbol
V
V
V
V
t
t
BOD
RST
HYST
POT
RST
BOT
1. The Power-on Reset will not work unless the supply voltage has been below V
2. V
this is the case, the device is tested down to V
antees that a Brown-out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL=1 for ATtiny26L and BODLEVEL=0 for ATtiny26. BODLEVEL=1 is not applicable
for ATtiny26.
Parameter
Power-on Reset Threshold
Voltage (rising)
Power-on Reset Threshold
Voltage (falling)
RESET Pin Threshold Voltage
Minimum pulse width on
RESET Pin
Brown-out Reset Threshold
Voltage
Minimum low voltage period for
Brown-out Detection
Brown-out Detector hysteresis
BOT
may be below nominal minimum operating voltage for some devices. For devices where
(2)
(1)
CC
decreases below detection level.
CC
BODLEVEL = 1
BODLEVEL = 0
BODLEVEL = 1
BODLEVEL = 0
Condition
rise. The time-out period of the delay counter can
CC
CC
= V
is below the detection level. The POR
BOT
Min
0.2
2.4
3.7
CC
during the production test. This guar-
drops to a voltage where correct
Typ
130
1.4
1.3
2.7
4.0
2
2
Max
2.3
2.3
0.9
1.5
2.9
4.5
Units
POT
V
mV
µs
µs
µs
V
V
V
CC
(falling)
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