ATmega48 Atmel Corporation, ATmega48 Datasheet - Page 289

• Manufacturer Part Number: ATmega48
• Manufacturer: Atmel Corporation

Specifications of ATmega48

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 20 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 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: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

28.5
28.6
28.6.1
2545T–AVR–05/11
Page size
Parallel programming parameters, pin mapping, and commands
Signal names
Table 28-9.
Table 28-10. No. of words in a page and no. of pages in the EEPROM.
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock bits, and Fuse bits in the ATmega48/88/168. Pulses are assumed
to be at least 250ns unless otherwise noted.
In this section, some pins of the ATmega48/88/168 are referenced by signal names describing
their functionality during parallel programming, see
page
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
Device
Atmel
ATmega48
Atmel
ATmega88
Atmel
ATmega168
Device
ATmega48
ATmega88
ATmega168
290. Pins not described in
No. of words in a page and no. of pages in the flash.
Flash size
EEPROM
256 bytes
512 bytes
512 bytes
(4Kbytes)
(8Kbytes)
(16Kbytes)
2K words
4K words
8K words
size
Table 28-14 on page
Table 28-13 on page
Page size
32 words
32 words
64 words
4 bytes
4 bytes
4 bytes
Table 28-11 on page 290
Page
size
PCWORD
PCWORD
EEA[1:0]
EEA[1:0]
EEA[1:0]
PC[4:0]
PC[4:0]
PC[5:0]
291.
291.
Figure 28-1 on page 290
are referenced by pin names.
pages
No. of
pages
No. of
128
128
128
128
64
ATmega48/88/168
64
PCPAGE
PCPAGE
PC[10:5]
PC[11:5]
PC[12:6]
EEA[7:2]
EEA[8:2]
EEA[8:2]
and
Table 28-11 on
EEAMSB
PCMSB
10
11
12
7
8
8
289