ATmega88 Atmel Corporation, ATmega88 Datasheet - Page 308

• 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

29.6
Table 29-5
Serial Interface meets or exceeds these requirements under the noted conditions.
Timing symbols refer to
Table 29-5.
Notes:
2545T–AVR–05/11
Symbol
V
V
V
V
tr
tof
tSP
I
C
f
Rp
t
t
t
t
t
t
t
t
i
SCL
HD;STA
LOW
HIGH
SU;STA
HD;DAT
SU;DAT
SU;STO
BUF
(1)
IL
IH
hys
OL
i
(1)
(1)
(1)
(1)
(1)
2-wire serial interface characteristics
1. In ATmega48/88/168, this parameter is characterized and not 100% tested.
2. Required only for f
describes the requirements for devices connected to the 2-wire Serial Bus. The Atmel ATmega48/88/168 2-wire
Parameter
Input low-voltage
Input high-voltage
Hysteresis of schmitt trigger inputs
Output low-voltage
Rise time for both SDA and SCL
Output fall time from V
Spikes suppressed by input filter
Input current each I/O pin
Capacitance for each I/O pin
SCL clock frequency
Value of pull-up resistor
Hold time (repeated) START condition
Low period of the SCL clock
High period of the SCL clock
Setup time for a repeated START condition
Data hold time
Data setup time
Setup time for STOP condition
Bus free time between a STOP and START
condition
2-wire serial bus requirements.
Figure 29-4 on page
SCL
> 100kHz.
IHmin
to V
ILmax
309.
f
CK
(4)
10pF < C
0.1V
> max(16f
3mA sink current
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
CC
Condition
< V
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
b
< 400pF
SCL
i
< 0.9V
, 250kHz)
CC
(3)
(5)
20 + 0.1C
20 + 0.1C
V
--------------------------- -
V
--------------------------- -
0.05V
CC
CC
0.7V
ATmega48/88/168
3mA
3mA
Min.
-0.5
250
100
-10
4.0
0.6
4.7
1.3
4.0
0.6
4.7
0.6
4.0
0.6
4.7
1.3
–
–
0
0
–
0
0
0
0.4V
0.4V
CC
CC
b
b
(2)
(3)(2)
(3)(2)
V
0.3V
1000ns
---------------- -
CC
300ns
------------- -
Max.
50
3.45
300
250
400
0.4
0.9
C
10
10
C
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
+ 0.5
b
(2)
b
CC
Units
kHz
µA
pF
ns
µs
ns
µs
Ω
V
308