ATTINY84V-10PU Atmel, ATTINY84V-10PU Datasheet - Page 43

• Manufacturer Part Number: ATTINY84V-10PU
• Description: AVR MCU, 8K FLASH, 512B RAM, 512B EE
• Manufacturer: Atmel

Specifications of ATTINY84V-10PU

• Controller Family/series: AVR Tiny
• No. Of I/o's: 12
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 10MHz
• Core Size: 8bit
• Program Memory Size: 8KB
• Oscillator Type: External, Internal
• Processor Series: ATTINY8x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 10 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Package / Case: PDIP-14
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.0.5
9.0.6
8006F–AVR–02/07
Brown-out Detection
Watchdog Reset
ATtiny24/44/84 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
during 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
V
When the BOD is enabled, and V
9-5 on page
trigger level (V
out period t
The BOD circuit will only detect a drop in V
longer than t
Figure 9-5.
When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On
the falling edge of this pulse, the delay timer starts counting the Time-out period t
”Watchdog Timer” on page 44
Figure 9-6.
BOT
SDI (PB0), SII (PB1)
+ V
HYST
TOUT
BOD
43), the Brown-out Reset is immediately activated. When V
/2 and V
Brown-out Reset During Operation
Watchdog Reset During Operation
BOT+
INTERNAL
TIME-OUT
has expired.
given in
SDO (PB2)
RESET
RESET
SCI (PB3)
in
V
CC
BOT-
Figure 9-5 on page
”System and Reset Characterizations” on page
= V
BOT
for details on operation of the Watchdog Timer.
- V
CC
t
HYST
decreases to a value below the trigger level (V
IVSH
V
BOT-
/2.
43), the delay counter starts the MCU after the Time-
CC
if the voltage stays below the trigger level for
t
SHSL
t
SHOV
V
t
TOUT
BOT+
t
SHIX
ATtiny24/44/84
CC
182.
increases above the
t
SLSH
BOT-
TOUT
in
CC
BOT+
Figure
. See
level
43
=