ATMEGA16-16AC Atmel, ATMEGA16-16AC Datasheet - Page 40
![IC AVR MCU 16K 16MHZ COM 44-TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA16-16AC
Manufacturer Part Number
ATMEGA16-16AC
Description
IC AVR MCU 16K 16MHZ COM 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA16-16AC
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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External Reset
Brown-out Detection
2466T–AVR–07/10
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the
Reset Threshold Voltage – V
the Time-out period t
Figure 18. External Reset During Operation
ATmega16 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
ing operation by comparing it to a fixed trigger level. The trigger level for the BOD can be
selected by the fuse BODLEVEL to be 2.7V (BODLEVEL unprogrammed), or 4.0V (BODLEVEL
programmed). 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
The BOD circuit can be enabled/disabled by the fuse BODEN. When the BOD is enabled
(BODEN programmed), and V
19), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
ger than t
Figure 19. Brown-out Reset During Operation
BOT
BOT+
- V
in
HYST
BOD
Figure
/2.
given in
CC
INTERNAL
TIME-OUT
19), the delay counter starts the MCU after the Time-out period t
RESET
RESET
TOUT
V
Table
CC
has expired.
15.
Table
RST
CC
– on its positive edge, the delay counter starts the MCU after
decreases to a value below the trigger level (V
15) will generate a reset, even if the clock is not running.
V
BOT-
CC
if the voltage stays below the trigger level for lon-
CC
V
BOT+
t
TOUT
BOT+
increases above the trigger level
= V
BOT
ATmega16(L)
+ V
HYST
/2 and V
BOT-
CC
level dur-
TOUT
in
Figure
BOT-
has
40
=
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