ATmega168 Atmel Corporation, ATmega168 Datasheet - Page 312

• Manufacturer Part Number: ATmega168
• Manufacturer: Atmel Corporation

Specifications of ATmega168

• 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: 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

29.9
2545T–AVR–05/11
Parallel programming characteristics
Figure 29-7. Parallel programming timing, including some general timing requirements.
Figure 29-8. Parallel programming timing, loading sequence with timing requirements
Note:
(DATA, XA0/1, BS1, BS2)
PAGEL
XTAL1
DATA
BS1
XA0
XA1
1. The timing requirements shown in
loading operation.
Data & contol
RDY/BSY
ADDR0 (low byte)
LOAD ADDRESS
PAGEL
XTAL1
(LOW BYTE)
WR
t
t
BVPH
DVXH
LOAD DATA
(LOW BYTE)
DATA (low byte)
t
t
XHXL
PHPL
Figure 29-7
t
t
t
t
t
XLXH
XLDX
PLBX
XLWL
PLWL
(that is, t
t
BVWL
(HIGH BYTE)
LOAD DATA
DATA (high byte)
t
DVXH
WLWH
t
XLPH
ATmega48/88/168
WLRL
LOAD DATA
, t
XHXL
t
PLXH
, and t
t
WLBX
LOAD ADDRESS
XLDX
(LOW BYTE)
ADDR1 (low byte)
) also apply to
t
WLRH
(1)
.
312