ATMEGA128A-MNR Atmel, ATMEGA128A-MNR Datasheet - Page 52
ATMEGA128A-MNR
Manufacturer Part Number
ATMEGA128A-MNR
Description
IC MCU AVR 128K FLASH 64VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA128A-MNR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K 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-TQFP
Core
AVR8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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10.2.1
8151H–AVR–02/11
Power-on Reset
Figure 10-1. Reset Logic
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
V
well as to detect a failure in supply voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 10-2. MCU Start-up, RESET Tied to V
CC
is below the detection level. The POR circuit can be used to trigger the Start-up Reset, as
CC
INTERNAL
TIME-OUT
BODLEVEL
decreases below the detection level.
RESET
RESET
RESET
BODEN
PEN
V
“System and Reset Characteristics” on page
CC
Pull-up Resistor
Pull-up Resistor
Power-On Reset
JTAG Reset
Register
FILTER
SPIKE
D
L
Circuit
Q
Q
V
V
POT
RST
CC
CKSEL[3:0]
t
rise. The RESET signal is activated again, without any delay,
TOUT
SUT[1:0]
Watchdog
Watchdog
Oscillator
Generator
Timer
Clock
Reset Circuit
Reset Circuit
Brown-Out
CC
CK
MCU Control and Status
.
Register (MCUCSR)
DATA BUS
Delay Counters
324. The POR is activated whenever
ATmega128A
TIMEOUT
52
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