TINY88-15MZ Atmel, TINY88-15MZ Datasheet - Page 42
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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8.2.2
8.2.3
42
ATtiny88 Automotive
External Reset
Brown-out Detection
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
running. Shorter pulses are not guaranteed to generate a reset. When the applied signal
reaches the Reset Threshold Voltage – V
MCU after the Time-out period – t
RSTDISBL fuse, see
Figure 8-4.
ATtiny88 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
trigger level (V
increases above the trigger level (V
the Time-out period t
The BOD circuit will only detect a drop in V
ger than t
Figure 8-5.
BOT-
BOD
= V
CC
given in
BOT
External Reset During Operation
Brown-out Reset During Operation
INTERNAL
TIME-OUT
BOT-
RESET
RESET
- V
V
in
HYST
CC
TOUT
Table 20-4 on page
“System and Reset Characterizations” on page
Figure
/2. When the BOD is enabled, and V
has expired.
Table 21-4 on page
8-5), the Brown-out Reset is immediately activated. When V
TOUT
BOT+
V
– has expired. The External Reset can be disabled by the
BOT-
in
RST
192.
CC
Figure
– on its positive edge, the delay counter starts the
if the voltage stays below the trigger level for lon-
211) will generate a reset, even if the clock is not
8-5), the delay counter starts the MCU after
CC
V
t
TOUT
BOT+
decreases to a value below the
211.
BOT+
= V
CC
9157B–AVR–01/10
BOT
level during
+ V
HYST
CC
/2
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