ATmega88 Atmel Corporation, ATmega88 Datasheet - Page 307

• Manufacturer Part Number: ATmega88
• Manufacturer: Atmel Corporation

Specifications of ATmega88

• Flash (kbytes): 8 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• 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): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

29.5
Table 29-3.
Note:
Table 29-4.
Notes:
2545T–AVR–05/11
Symbol
V
V
V
V
PONSR
t
t
V
t
I
RST
HYST
BOD
POT
RST
BG
BG
BG
System and reset characteristics
1. The power-on reset will not work unless the supply voltage has been below V
1. V
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 110 and BODLEVEL = 101 for Atmel ATmega48V/88V/168V, and BODLEVEL = 101 and BODLEVEL = 100
for Atmel ATmega48/88/168.
BODLEVEL 2:0 Fuses
BOT
Parameter
Power-on reset threshold voltage (rising)
Power-on reset threshold voltage (falling)
Power-on slope rate
RESET pin threshold voltage
Minimum pulse width on RESET pin
Brown-out detector hysteresis
Min pulse width on brown-out reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
Reset, brown-out and internal voltage characteristics.
BODLEVEL fuse coding
may be below nominal minimum operating voltage for some devices. For devices where this is the case, the device is
111
110
101
100
011
010
001
000
CC
= V
BOT
during the production test. This guarantees that a brown-out reset will occur before V
(1)
.
(1)
Min. V
1.7
2.5
4.1
BOT
Condition
V
T
V
T
V
T
A
A
A
CC
CC
CC
= 25°C
= 25°C
= 25°C
= 2.7
= 2.7
= 2.7
Typ. V
1.8
2.7
4.3
BOD disabled
BOT
Reserved
POT
0.2V
Min.
0.05
0.01
0.7
1.0
(falling).
CC
ATmega48/88/168
Max. V
Typ.
1.0
0.9
1.1
50
40
10
2
2.0
2.9
4.5
BOT
0.9V
Max.
1.4
1.3
4.5
2.5
1.2
70
CC
CC
Units
drops to
V
Units
V/ms
mV
µA
µs
µs
µs
V
V
V
307