ATtiny48 Atmel Corporation, ATtiny48 Datasheet - Page 201

• 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

8008H–AVR–04/11
Figure 21-7. Serial Programming and Verify
Notes:
When programming the EEPROM, an auto-erase cycle is built into the self-timed programming
operation (in the Serial mode ONLY) and there is no need to first execute the Chip Erase
instruction.
The Chip Erase operation turns the content of every memory location in both the Program and
EEPROM arrays into 0xFF.
Depending on CKSEL fuses, a valid clock must be present. The minimum low and high periods
for the serial clock (SCK) input are defined as follows:
• Minimum low period of serial clock:
• Minimum high period of serial clock:
– When f
– When f
– When f
– When f
1. If the device is clocked by the internal oscillator, it is no need to connect a clock source to the
2. V
CLKI pin.
CC
ck
ck
ck
ck
- 0.3V <
< 12MHz: > 2 CPU clock cycles
>= 12MHz: 3 CPU clock cycles
< 12MHz: > 2 CPU clock cycles
>= 12MHz: 3 CPU clock cycles
MOSI
MISO
SCK
AV
CC
< V
CC
+ 0.3V, however, AV
CLKI
RESET
GND
(1)
CC
should always be within 1.8 – 5.5V
AVCC
VCC
+1.8 - 5.5V
+1.8 - 5.5V
ATtiny48/88
(2)
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