ATmega1280 Atmel Corporation, ATmega1280 Datasheet - Page 339

• Manufacturer Part Number: ATmega1280
• Manufacturer: Atmel Corporation

Specifications of ATmega1280

• Flash (kbytes): 128 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

30.6.1
2549N–AVR–05/11
Signal Names
In this section, some pins of the ATmega640/1280/1281/2560/2561 are referenced by signal
names describing their functionality during parallel programming, see
9. Pins not described in the following table are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse.
The bit coding is shown in
When pulsing WR or OE, the command loaded determines the action executed. The different
commands are shown in
Figure 30-1. Parallel Programming
Note:
Table 30-9.
Programming Mode
Signal Name in
RDY/BSY
1. Unused Pins should be left floating.
PAGEL
DATA
BS1
XA0
XA1
BS2
WR
OE
Pin Name Mapping
Table 30-13 on page
RDY/BSY
Pin Name
Table 30-12 on page
PAGEL
PB7-0
+12V
PD1
PD2
PD3
PD4
PD5
PD6
PD7
BS1
XA0
XA1
BS2
PA0
WR
OE
ATmega640/1280/1281/2560/2561
(1)
I/O
I/O
PD1
PD2
PD3
PD4
PD5
PD6
PD7
RESET
XTAL1
GND
O
PA0
I
I
I
I
I
I
I
Program Memory and EEPROM data Page Load
Bi-directional Data bus (Output when OE is low)
Function
0: Device is busy programming, 1: Device is ready for
new command
Output Enable (Active low)
Write Pulse (Active low)
Byte Select 1
XTAL Action Bit 0
XTAL Action Bit 1
Byte Select 2
340.
340.
PB7 - PB0
AVCC
VCC
+5V
+5V
DATA
Figure 30-1
and
Table 30-
339