ATMEGA169L-8MI Atmel, ATMEGA169L-8MI Datasheet - Page 39

• Manufacturer Part Number: ATMEGA169L-8MI
• Description: IC MCU AVR 16K LV 8MHZ IND 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA169L-8MI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: ATMEGA169L-4MI; ATMEGA169L-4MI

External Reset
Brown-out Detection
2514H–AVR–05/03
An External Reset is generated by a low level on the RESET pin. Reset pulses longer
than the minimum pulse width (see Table 16) will generate a reset, even if the clock is
not running. Shorter pulses are not guaranteed to generate a reset. When the applied
signal reaches the Reset Threshold Voltage – V
counter starts the MCU after the Time-out period – t
Figure 17. External Reset During Operation
ATmega169 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
level 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
Table 17. BODLEVEL Fuse Coding
Note:
Table 18. Brown-out Characteristics
Symbol
V
t
BOD
HYST
BODLEVEL 2..0 Fuses
CC
1. V
devices where this is the case, the device is tested down to V
production test. This guarantees that a Brown-Out Reset will occur before V
to a voltage where correct operation of the microcontroller is no longer guaranteed.
The
BODLEVEL = 101 for ATmega169L.
BOT
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
111
110
101
100
011
010
001
000
BOT+
may be below nominal minimum operating voltage for some devices. For
test
= V
is
BOT
performed
+ V
HYST
/2 and V
(1)
Min V
using
BOT
BOT-
BODLEVEL = 110
= V
RST
Typ V
TOUT
BOT
1.8
2.7
4.3
BOD Disabled
– on its positive edge, the delay
- V
Reserved
BOT
– has expired.
Min
ATmega169V/L
HYST
/2.
Typ
for
50
Max V
2
CC
ATmega169V
BOT
= V
Max
BOT
during the
CC
Units
Units
mV
µs
V
drops
and
39
CC