ATmega168 Automotive Atmel Corporation, ATmega168 Automotive Datasheet - Page 32

• Manufacturer Part Number: ATmega168 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega168 Automotive

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 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: 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 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 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

6.7
6.8
32
128 kHz Internal Oscillator
External Clock
ATmega48/88/168 Automotive
The 128 kHz internal Oscillator is a low power Oscillator providing a clock of 128 kHz. The fre-
quency is nominal at 3V and 25°C. This clock may be select as the system clock by
programming the CKSEL Fuses to “11” as shown in
Table 6-10.
Note:
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 6-11.
Note:
The device can utilize a external clock source as shown in
external clock, the CKSEL Fuses must be programmed as shown in
Table 6-12.
Notes:
BOD enabled
Fast rising power
Slowly rising power
Frequency Range
Power Conditions
6-11.
1. The frequency is preliminary value. Actual value is TBD.
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to
1. The frequency ranges are preliminary values. Actual values are TBD.
2. If 8 MHz frequency exceeds the specification of the device (depends on V
14CK + 4.1 ms to ensure programming mode can be entered.
Fuse can be programmed in order to divide the internal frequency by 8. It must be ensured
that the resulting divided clock meets the frequency specification of the device.
128 kHz Internal Oscillator Operating Modes
Start-up Times for the 128 kHz Internal Oscillator
Full Swing Crystal Oscillator operating modes
0 - 100
(1)
Nominal Frequency
(MHz)
128 kHz
Power-down and Power-save
Start-up Time from
CKSEL3..0
Reserved
6 CK
6 CK
6 CK
0000
Table
Recommended Range for Capacitors C1
6-10.
Figure
(2)
Additional Delay from
14CK + 64 ms
14CK + 4 ms
6-4. To run the device on an
14CK
and C2 (pF)
Table
Reset
12 - 22
CKSEL3..0
(1)
6-12.
0011
CC
), the CKDIV8
7530I–AVR–02/10
SUT1..0
00
01
10
11