ATmega3250 Atmel Corporation, ATmega3250 Datasheet - Page 282
ATmega3250
Manufacturer Part Number
ATmega3250
Description
Manufacturer
Atmel Corporation
Specifications of ATmega3250
Flash (kbytes)
32 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
69
Ext Interrupts
25
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)
2
Eeprom (bytes)
1024
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
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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27.7.3
Table 27-15. Serial Programming Instruction Set
2570N–AVR–05/11
Instruction/Operation
Programming Enable
Chip Erase (Program Memory/EEPROM)
Poll RDY/BSY
Load Instructions
Load Extended Address byte
Load Program Memory Page, High byte
Load Program Memory Page, Low byte
Load EEPROM Memory Page (page access)
Read Instructions
Read Program Memory, High byte
Read Program Memory, Low byte
Read EEPROM Memory
Serial Programming Instruction set
8. Power-off sequence (if needed):
Table 27-14. Minimum Wait Delay Before Writing the Next Flash or EEPROM Location
Figure 27-11. Serial Programming Waveforms
Table 27-15
(1)
Symbol
t
t
t
t
WD_FUSE
WD_FLASH
WD_EEPROM
WD_ERASE
Set RESET to “1”.
Turn V
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
CC
and
power off.
SAMPLE
Figure 27-12 on page 284
(MOSI)
(MISO)
(SCK)
Byte 1
$AC
$AC
$4D
$C1
$A0
$F0
$48
$40
$28
$20
MSB
MSB
0000 00aa
0000 0aaa
adr MSB
adr MSB
Byte 2
describes the Instruction set.
ATmega325/3250/645/6450
$53
$80
$00
$00
$00
$00
$00
/
Instruction Format
Minimum Wait Delay
4.5ms
4.5ms
9.0ms
9.0ms
Extended adr
0000 00aa
0000 0aaa
aaaa aaaa
adr LSB
adr LSB
adr LSB
adr LSB
Byte 3
$00
$00
$00
/
high data byte out
low data byte out
high data byte in
low data byte in
data byte out
data byte out
data byte in
LSB
LSB
Byte4
$00
$00
$00
282
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