ATmega640 Atmel Corporation, ATmega640 Datasheet - Page 165
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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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17.11.27 OCR5BH and OCR5BL – Output Compare Register 5 B
17.11.28 OCR5CH and OCR5CL –Output Compare Register 5 C
17.11.29 ICR1H and ICR1L – Input Capture Register 1
17.11.30 ICR3H and ICR3L – Input Capture Register 3
17.11.31 ICR4H and ICR4L – Input Capture Register 4
17.11.32 ICR5H and ICR5L – Input Capture Register 5
2549N–AVR–05/11
The Output Compare Registers contain a 16-bit value that is continuously compared with the
counter value (TCNTn). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OCnx pin.
The Output Compare Registers are 16-bit in size. To ensure that both the high and low bytes are
written simultaneously when the CPU writes to these registers, the access is performed using an
8-bit temporary High Byte Register (TEMP). This temporary register is shared by all the other
16-bit registers.
Bit
(0x12B)
(0x12A)
Read/Write
Initial Value
Bit
(0x12D)
(0x12C)
Read/Write
Initial Value
Bit
(0x87)
(0x86)
Read/Write
Initial Value
Bit
(0x97)
(0x96)
Read/Write
Initial Value
Bit
(0xA7)
(0xA6)
Read/Write
Initial Value
Bit
(0x127)
(0x126)
Read/Write
Initial Value
See “Accessing 16-bit Registers” on page 138.
R/W
R/W
R/W
R/W
R/W
R/W
7
0
7
0
7
0
7
0
7
0
7
0
R/W
R/W
R/W
R/W
R/W
R/W
6
0
6
0
6
0
6
0
6
0
6
0
ATmega640/1280/1281/2560/2561
R/W
R/W
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R/W
R/W
R/W
4
0
4
0
4
0
4
0
4
0
4
0
OCR5B[15:8]
OCR5C[15:8]
OCR5B[7:0]
OCR5C[7:0]
ICR1[15:8]
ICR3[15:8]
ICR4[15:8]
ICR5[15:8]
ICR1[7:0]
ICR3[7:0]
ICR4[7:0]
ICR5[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
0
3
0
3
0
R/W
R/W
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
2
0
2
0
R/W
R/W
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
1
0
1
0
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
0
0
OCR5BH
OCR5CH
OCR5BL
OCR5CL
ICR1H
ICR3H
ICR4H
ICR5H
ICR1L
ICR3L
ICR4L
ICR5L
165
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