ATtiny88 Atmel Corporation, ATtiny88 Datasheet - Page 212

• Manufacturer Part Number: ATtiny88
• Manufacturer: Atmel Corporation

Specifications of ATtiny88

• Flash (kbytes): 8 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 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: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• 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: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

22.8
The following data is based on simulations and characterisations. Parameters listed in
tion. Symbols refer to
Table 22-7.
Notes:
Figure 22-3. Two-Wire Serial Bus Timing
212
Symbol
V
V
V
V
t
f
t
t
t
t
t
t
t
t
SCL
SDA
SP
SCL
HD:STA
LOW
HIGH
SU:STA
HD:DAT
SU:DAT
SU:STO
BUF
OL
IL
IH
HYS
Two-Wire Serial Interface Characteristics
1. f
t
ATtiny48/88
SU;STA
Parameter
Input Low voltage
Input High voltage
Hysteresis of Schmitt-trigger inputs
Output Low voltage
Spikes suppressed by input filter
SCL clock frequency
Hold time (repeated) START Condition
Low period of SCL clock
High period of SCL clock
Set-up time for repeated START condition
Data hold time
Data setup time
Setup time for STOP condition
Bus free time between STOP and START condition
CK
= CPU clock frequency.
Two-Wire Serial Interface Characteristics
Figure
22-3.
(1)
t
HD;STA
t
of
t
LOW
t
HIGH
t
HD;DAT
Condition
V
V
3mA sink current
f
CK
t
CC
CC
LOW
> max(16f
< 2.7V
2.7V
t
SU;DAT
SCL
, 250kHz)
Table 22-7
0.05 V
0.7 V
Min
-0.5
100
0.6
1.3
0.6
0.6
0.6
1.3
0
0
0
0
0
CC
CC
are not tested in produc-
t
SU;STO
t
r
V
0.3 V
CC
Max
400
0.4
0.9
50
–
–
–
–
–
–
–
–
+ 0.5
8008H–AVR–04/11
CC
t
BUF
Unit
kHz
ns
µs
µs
µs
µs
µs
ns
µs
µs
V
V
V
V