ATtiny48 Atmel Corporation, ATtiny48 Datasheet - Page 198

• Manufacturer Part Number: ATtiny48
• Manufacturer: Atmel Corporation

Specifications of ATtiny48

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 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: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• 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: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

21.2.7
21.2.8
21.2.9
21.2.10
198
ATtiny48/88
Reading the EEPROM
Programming Low Fuse Bits
Programming High Fuse Bits
Programming Extended Fuse Bits
The algorithm for reading the EEPROM memory is as follows (see
page 194
The algorithm for programming the low fuse bits is as follows (see
page 194
The algorithm for programming the high fuse bits is as follows (see
page 194
The algorithm for programming the extended fuse bits is as follows (see
Flash” on page 194
EEPROM programming waveforms are illustrated in
and letters refer to the programming steps described above.
• Set BS1 to “1”. The Flash word high byte can now be read at DATA
• Set OE to “1”
• A: Load command “0000 0011”
• G: Load address high byte (0x00 – 0xFF)
• B: Load address low byte (0x00 – 0xFF)
• Set OE to “0”, and BS1 to “0”. The EEPROM Data byte can now be read at DATA
• Set OE to “1”
• A: Load command “0100 0000”
• C: Load data low byte. Bit n = “0” programs and bit n = “1” erases the fuse bit
• Give WR a negative pulse and wait for RDY/BSY to go high
• A: Load command “0100 0000”
• C: Load data low byte. Bit n = “0” programs and bit n = “1” erases the fuse bit
• Set BS1 to “1” and BS2 to “0”. This selects high data byte
• Give WR a negative pulse and wait for RDY/BSY to go high
• Set BS1 to “0”. This selects low data byte
• A: Load command “0100 0000”
• C: Load data low byte. Bit n = “0” programs and bit n = “1” erases the fuse bit
• Set BS1 to “0” and BS2 to “1”. This selects extended data byte
• Give WR a negative pulse and wait for RDY/BSY to go high
• Set BS2 to “0”. This selects low data byte
for details on command and address loading):
for details on command and data loading):
for details on command and data loading):
for details on command and data loading):
Figure
21-5, where XX means “don’t care”
“Programming the Flash” on
“Programming the Flash” on
“Programming the Flash” on
“Programming the
8008H–AVR–04/11