ATmega640 Atmel Corporation, ATmega640 Datasheet - Page 331
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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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29.6.16
2549N–AVR–05/11
ATmega2560/2561 Boot Loader Parameters
Table 29-12. Explanation of different variables used in
Notes:
In
Self-Programming are given.
Table 29-13. Boot Size Configuration, ATmega2560/2561
Note:
Variable
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 29-13
1
1
0
0
1. Z0: should be zero for all SPM commands, byte select for the (E)LPM instruction.
2. See
3. The Z-register is only 16 bits wide. Bit 16 is located in the RAMPZ register in the I/O map.
1. The different BOOTSZ Fuse configurations are shown in
Z-pointer during Self-Programming.
1
0
1
0
ping to the Z-pointer, ATmega1280/1281 (Continued)
through
“Addressing the Flash During Self-Programming” on page 322
PC[15:7]
PC[6:0]
6
words
words
words
words
1024
2048
4096
512
Table 29-15 on page
Corresponding
Z-value
16
32
ATmega640/1280/1281/2560/2561
Z16
4
8
Z7:Z1
Z16
Z7
(3)
(3)
:Z8
(2)
0x00000 -
0x1FDFF
0x00000 -
0x1FBFF
0x00000 -
0x1F7FF
0x00000 -
0x1EFFF
332, the parameters used in the description of the
Description
Most significant bit which is used to address the
words within one page (128 words in a page
requires seven bits PC [6:0]).
Bit in Z-pointer that is mapped to PCMSB. Because
Z0 is not used, the ZPCMSB equals PCMSB + 1.
Bit in Z-pointer that is mapped to PCMSB. Because
Z0 is not used, the ZPAGEMSB equals PAGEMSB +
1.
Program Counter page address: Page select, for
Page Erase and Page Write
Program Counter word address: Word select, for
filling temporary buffer (must be zero during Page
Write operation)
0x1FE00 -
0x1FFFF
0x1FC00 -
0x1FFFF
0x1F800 -
0x1FFFF
0x1F000 -
0x1FFFF
Figure 29-3 on page 322
(1)
(1)
Figure 29-2 on page
0x1FDFF
0x1FBFF
0x1F7FF
0x1EFFF
for details about the use of
and the map-
320.
0x1FE00
0x1FC00
0x1F800
0x1F000
331
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