ATmega640 Atmel Corporation, ATmega640 Datasheet - Page 94
ATmega640
Manufacturer Part Number
ATmega640
Description
Manufacturer
Atmel Corporation
Specifications of ATmega640
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
86
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
5
Twi (i2c)
1
Uart
4
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
8
Eeprom (bytes)
4096
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
6
Output Compare Channels
16
Input Capture Channels
4
Pwm Channels
15
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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Quantity
Price
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12 000
Part Number:
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Manufacturer:
ATMEL/爱特梅尔
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13.3.9
2549N–AVR–05/11
Alternate Functions of Port J
Table 13-26. Overriding Signals for Alternate Functions in PH3:PH0
The Port J alternate pin configuration is as follows:
Table 13-27. Port J Pins Alternate Functions
• PCINT15:12 - Port J, Bit 6:3
PCINT15:12, Pin Change Interrupt Source 15:12. The PJ6:3 pins can serve as External Interrupt
Sources.
• XCK2/PCINT11 - Port J, Bit 2
XCK2, USART 2 External Clock. The Data Direction Register (DDJ2) controls whether the clock
is output (DDJ2 set) or input (DDJ2 cleared). The XCK2 pin is active only when the USART2
operates in synchronous mode.
PCINT11, Pin Change Interrupt Source 11. The PJ2 pin can serve as External Interrupt
Sources.
Signal Name
DIEOE
DIEOV
Port Pin
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
AIO
DI
PJ7
PJ6
PJ5
PJ4
PJ3
PJ2
PJ1
PJ0
OC4A ENABLE
PH3/OC4A
OC4A
XCK3/PCINT11 (USART3 External Clock or Pin Change Interrupt 11)
0
0
0
0
–
0
0
0
–
TXD3/PCINT10 (USART3 Transmit Pin or Pin Change Interrupt 10)
RXD3/PCINT9 (USART3 Receive Pin or Pin Change Interrupt 9)
ATmega640/1280/1281/2560/2561
XCK2 OUTPUT
XCK2 OUTPUT
PCINT15 (Pin Change Interrupt 15)
PCINT14 (Pin Change Interrupt 14)
PCINT13 (Pin Change Interrupt 13)
PCINT12 (Pin Change Interrupt 12)
XC2K INPUT
PH2/XCK2
ENABLE
ENABLE
XCK2
0
0
1
–
0
0
–
Alternate Function
–
PH1/TXD2
TXEN2
TXEN2
TXEN2
TXD2
0
1
–
0
0
0
–
PORTH0 • PUD
PH0/RXD2
RXEN2
RXEN2
RXD2
0
0
0
–
0
0
–
94
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