ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 297

• 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

Note:
25.8.4
7530I–AVR–02/10
a = address high bits, b = address low bits, H = 0 - Low byte, 1 - High Byte, o = data out, i = data in, x = don’t care
SPI Serial Programming Characteristics
Table 25-17. Serial Programming Instruction Set
For characteristics of the SPI module see “SPI Timing Characteristics” on page 305.
Instruction
Read Signature Byte
Write Fuse bits
Write Fuse High bits
Write Extended Fuse
Bits
Read Fuse bits
Read Fuse High bits
Read Extended Fuse
Bits
Read Calibration Byte
Poll RDY/BSY
Byte 1
0011
0000
1010
1100
1010
1100
1010
1100
0101
0000
0101
1000
0101
0000
0011
1000
1111
0000
Instruction Format
Byte 2
000x
xxxx
1010
0000
1010
1000
1010
0100
0000
0000
0000
1000
0000
1000
000x
xxxx
0000
0000
ATmega48/88/168 Automotive
Byte 3
xxxx
xxbb
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
xxxx
0000
0000
xxxx
xxxx
Byte4
oooo
oooo
iiii
iiii
iiii
iiii
xxxx
xxii
oooo
oooo
oooo
oooo
oooo
oooo
oooo
oooo
xxxx
xxxo
Operation
Read Signature Byte o at
address b.
Set bits = “0” to program, “1”
to unprogram. See Table
XXX on page XXX for details.
Set bits = “0” to program, “1”
to unprogram. See
on page 242
Set bits = “0” to program, “1”
to unprogram. See
25-4 on page 280
details.
Read Fuse bits. “0” =
programmed, “1” =
unprogrammed. See Table
XXX on page XXX for details.
Read Fuse High bits. “0” =
pro-grammed, “1” =
unprogrammed. See
21-1 on page 242
Read Extended Fuse bits. “0”
= pro-grammed, “1” =
unprogrammed. See
25-4 on page 280
Read Calibration Byte
If o = “1”, a programming
operation is still busy. Wait
until this bit returns to “0”
before applying another
command.
for details.
for details.
for details.
Table 21-1
Table
for
Table
Table
297