ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 229

• Manufacturer Part Number: ATmega406
• Manufacturer: Atmel Corporation

Specifications of ATmega406

• Flash (kbytes): 40 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 1 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -30 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 2
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

30.4
Table 30-1
Interface meets or exceeds these requirements under the noted conditions.
Timing symbols refer to
Table 30-1.
Notes:
2548E–AVR–07/06
Symbol
VIL
VIH
VOL
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)
i
(1)
(1)
(1)
(1)
2-wire Serial Interface Characteristics
1. In ATmega406, this parameter is characterized and not tested.
2. C
3. f
4. This requirement applies to all ATmega406 Two-wire Serial Interface operation. Other devices connected to the Two-wire
describes the requirements for devices connected to the Two-wire Serial Bus. The ATmega406 Two-wire Serial
Serial Bus need only obey the general f
Parameter
Input Low-voltage
Input High-voltage
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
Set-up 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
CK
b
= capacitance of one bus line in pF.
= CPU clock frequency
Two-wire Serial Bus Requirements
Figure
30-3.
IHmin
to V
ILmax
SCL
requirement.
f
CK
(3)
0.1V
> max(16f
350 µA sink current
f
f
f
f
f
f
f
f
f
C
BUS
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
b
Condition
< 400 pF
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
< V
SCL
i
< 0.9V
, 450 kHz)
(2)
BUS
(4)
V
------------------------------ -
BUS
350µA
Min
-0.5
250
2.1
4.0
4.7
4.0
4.7
0.3
4.0
4.7
-5
0
–
0
0
–
0,4V
ATmega406
V
------------------------------ -
BUS
100µA
Max
3.45
300
250
100
0.8
5.5
0.4
50
10
5
–
–
–
–
–
–
–
–
0,4V
Units
kHz
µA
pF
µs
ns
ns
ns
µs
µs
µs
µs
ns
µs
µs
V
V
Ω
V
229