ATmega1284RZAP Atmel Corporation, ATmega1284RZAP Datasheet - Page 51

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ATmega1284RZAP

Manufacturer Part Number
ATmega1284RZAP
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega1284RZAP

Flash (kbytes)
128 Kbytes
Max. Operating Frequency
20 MHz
Max I/o Pins
32
Spi
3
Twi (i2c)
1
Uart
2
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
No
Sram (kbytes)
16
Eeprom (bytes)
4096
Operating Voltage (vcc)
1.8 to 3.6
Timers
3
Frequency Band
2.4 GHz
Max Data Rate (mb/s)
0.25
Antenna Diversity
No
External Pa Control
No
Power Output (dbm)
3
Receiver Sensitivity (dbm)
-101
Receive Current Consumption (ma)
16.0
Transmit Current Consumption (ma)
17.0
Link Budget (dbm)
104
9.1.4
9.1.5
8059D–AVR–11/09
Brown-out Detection
Watchdog Reset
ATmega1284P 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
ger 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
page 59
Figure 9-6.
BOT
+ V
for details on operation of the Watchdog Timer.
HYST
BOD
CC
TOUT
51), the Brown-out Reset is immediately activated. When V
/2 and V
given in
Brown-out Reset During Operation
Watchdog Reset During Operation
BOT+
INTERNAL
TIME-OUT
has expired.
RESET
RESET
in
V
CC
BOT-
Figure 9-5 on page
”System and Reset Characteristics” on page
= V
BOT
- V
CC
HYST
decreases to a value below the trigger level (V
V
CK
BOT-
/2.
51), the delay counter starts the MCU after the Time-
CC
if the voltage stays below the trigger level for lon-
V
t
TOUT
BOT+
327.
ATmega1284P
CC
increases above the
TOUT
BOT-
. Refer to
in
CC
BOT+
Figure
level
51
=

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