ATmega168A Atmel Corporation, ATmega168A Datasheet - Page 325

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ATmega168A

Manufacturer Part Number
ATmega168A
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega168A

Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
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
Yes
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

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29.6
8271D–AVR–05/11
SPI Timing Characteristics
See
Table 29-14. SPI Timing Parameters
Note:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Figure 29-3
Description
SCK period
SCK high/low
Rise/Fall time
Setup
Hold
Out to SCK
SCK to out
SCK to out high
SS low to out
SCK period
SCK high/low
Rise/Fall time
Setup
Hold
SCK to out
SCK to SS high
SS high to tri-state
SS low to SCK
1. In SPI Programming mode the minimum SCK high/low period is:
2. All DC Characteristics contained in this datasheet are based on simulation and characteriza-
- 2 t
- 3 t
tion of other AVR microcontrollers manufactured in the same process technology. These
values are preliminary values representing design targets, and will be updated after character-
ization of actual silicon.
CLCL
CLCL
and
for f
for f
(1)
ATmega48A/PA/88A/PA/168A/PA/328/P
Figure 29-4
CK
CK
< 12MHz
> 12MHz
Mode
Master
Master
Master
Master
Master
Master
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
for details.
Min.
4 • t
2 • t
10
t
20
20
ck
ck
ck
Typ
See
50% duty cycle
3.6
10
10
0.5 • t
10
10
15
15
10
Table 19-5
sck
Max
1600
325
ns

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