ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 296

• Manufacturer Part Number: ATmega48 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega48 Automotive

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• 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): 0.5
• Eeprom (bytes): 256
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

296
ATmega48/88/168 Automotive
Figure 25-11. Serial Programming Waveforms
Table 25-17. Serial Programming Instruction Set
Instruction
Programming Enable
Chip Erase
Read Program
Memory
Load Program
Memory Page
Write Program
Memory Page
Read EEPROM
Memory
Write EEPROM
Memory
Load EEPROM
Memory Page (page
access)
Write EEPROM
Memory Page (page
access)
Read Lock bits
Write Lock bits
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
SAMPLE
(MOSI)
(MISO)
(SCK)
Byte 1
1010
1100
1010
1100
0010
H000
0100
H000
0100
1100
1010
0000
1100
0000
1100
0001
1100
0010
0101
1000
1010
1100
MSB
MSB
Instruction Format
Byte 2
0101
0011
100x
xxxx
000a
aaaa
000x
xxxx
000a
aaaa
000x
xxaa
000x
xxaa
0000
0000
00xx
xxaa
0000
0000
111x
xxxx
Byte 3
xxxx
xxxx
xxxx
xxxx
bbbb
bbbb
xxbb
bbbb
bbxx
xxxx
bbbb
bbbb
bbbb
bbbb
0000
00bb
bbbb
bb00
xxxx
xxxx
xxxx
xxxx
Byte4
xxxx
xxxx
xxxx
xxxx
oooo
oooo
iiii
iiii
xxxx
xxxx
oooo
oooo
iiii
iiii
iiii
iiii
xxxx
xxxx
xxoo
oooo
11ii
iiii
Operation
Enable Serial Programming
after RESET goes low.
Chip Erase EEPROM and
Flash.
Read H (high or low) data o
from Program memory at
word address a:b.
Write H (high or low) data i to
Program Memory page at
word address b. Data low
byte must be loaded before
Data high byte is applied
within the same address.
Write Program Memory Page
at address a:b.
Read data o from EEPROM
memory at address a:b.
Write data i to EEPROM
memory at address a:b.
Load data i to EEPROM
memory page buffer. After
data is loaded, program
EEPROM page.
Write EEPROM page at
address a:b.
Read Lock bits. “0” =
programmed, “1” =
unprogrammed. See
25-1 on page 278
Write Lock bits. Set bits = “0”
to program Lock bits. See
Table 25-1 on page 278
details.
LSB
LSB
7530I–AVR–02/10
for details.
Table
for