ATmega128A Atmel Corporation, ATmega128A Datasheet - Page 323

• Manufacturer Part Number: ATmega128A
• Manufacturer: Atmel Corporation

Specifications of ATmega128A

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

27.5
8151H–AVR–02/11
System and Reset Characteristics
Table 27-2.
Notes:
Table 27-3.
Notes:
Symbol
V
V
V
V
t
t
BOD
RST
HYST
POT
BOT
RST
1. R should be in the range 3 kΩ - 100 kΩ, and C should be at least 20pF. The C values given in
2. The frequency will vary with package type and board layout.
1. The Power-on Reset will not work unless the supply voltage has been below V
2. V
the table includes pin capacitance. This will vary with package type.
this is the case, the device is tested down to V
antees that a Brown-out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL=0 and BODLEVEL=1.
Parameter
Power-on Reset Threshold
Voltage (rising)
Power-on Reset Threshold
Voltage (falling)
Voltage
Pulse width on RESET Pin
Brown-out Reset Threshold
Voltage
Minimum low voltage
period for Brown-out
Detection
Brown-out Detector
hysteresis
BOT
RESET Pin Threshold
R [kΩ]
External RC Oscillator, Typical Frequencies
Reset Characteristics
may be below nominal minimum operating voltage for some devices. For devices where
33
10
(2)
(1)
(1)
BODLEVEL = 0
BODLEVEL = 0
Condition
C [pF]
22
22
CC
= V
CC
drops to a voltage where correct
BOT
0.2 V
Min
1.5
3.7
during the production test. This guar-
CC
Typ
100
ATmega128A
1.4
1.3
4.0
2
0.85 V
650kHz
2.0MHz
Max
2.3
2.3
4.5
f
POT
(2)
CC
(falling)
Units
mV
µs
µs
V
V
V
V
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