ATMEGA169V-1MC Atmel, ATMEGA169V-1MC Datasheet - Page 40
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ATMEGA169V-1MC
Manufacturer Part Number
ATMEGA169V-1MC
Description
IC MCU AVR 16K 1.8V 1MHZ 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-1MC
Core Processor
AVR
Core Size
8-Bit
Speed
1MHz
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°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
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Watchdog Reset
MCU Status Register –
MCUSR
40
ATmega169V/L
When the BOD is enabled, and V
in Figure 18), the Brown-out Reset is immediately activated. When V
the trigger level (V
out period t
The BOD circuit will only detect a drop in V
for longer than t
Figure 18. Brown-out Reset During Operation
When the Watchdog times out, it will generate a short reset pulse of one CK cycle dura-
tion. On the falling edge of this pulse, the delay timer starts counting the Time-out period
t
Figure 19. Watchdog Reset During Operation
The MCU Status Register provides information on which reset source caused an MCU
reset.
• Bit 4 – JTRF: JTAG Reset Flag
This bit is set if a reset is being caused by a logic one in the JTAG Reset Register
selected by the JTAG instruction AVR_RESET. This bit is reset by a Power-on Reset, or
by writing a logic zero to the flag.
TOUT
Bit
Read/Write
Initial Value
. Refer to page 42 for details on operation of the Watchdog Timer.
CC
INTERNAL
TOUT
TIME-OUT
RESET
RESET
BOD
V
R
has expired.
7
–
0
CC
BOT+
given in Table 16.
in Figure 18), the delay counter starts the MCU after the Time-
6
–
R
0
R
5
–
0
CC
V
CK
BOT-
decreases to a value below the trigger level (V
JTRF
R/W
4
CC
if the voltage stays below the trigger level
WDRF
R/W
3
See Bit Description
BORF
R/W
V
t
2
TOUT
BOT+
EXTRF
R/W
1
CC
increases above
PORF
R/W
2514H–AVR–05/03
0
MCUSR
BOT-
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