ATtiny48 Atmel Corporation, ATtiny48 Datasheet - Page 192

• 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

192
ATtiny48/88
Signals are described in
names.
Table 21-3.
Note:
Pulses are assumed to be at least 250 ns, unless otherwise noted.
Table 21-4.
The XA1/XA0 pins determine the action executed when the CLKI pin is given a positive pulse.
The bit coding is shown in
Table 21-5.
Signal Name in
Programming Mode
RDY/BSY
OE
WR
BS1
XA0
XA1
PAGEL
BS2
DATA
XA1
0
0
1
1
V
PAGEL
CC
XA1
XA0
BS1
Pin
- 0.3V < AV
XA0
Pin Name Mapping
Pin Values Used to Enter Programming Mode
XA1 and XA0 Coding
0
1
0
1
CC
Action when CLKI is Pulsed
Load Flash or EEPROM Address (High or low address byte determined by BS1).
Load Data (High or Low data byte for Flash determined by BS1).
Load Command
No Action, Idle
< V
Table
{PC[1:0]: PB[5:0]}
Table
CC
Pin Name
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
+ 0.3V, however, AV
21-3, below. Pins not listed in the table are referenced by pin
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PC2
21-5.
Symbol
I/O
I/O
O
I
I
I
I
I
I
I
CC
should always be within 4.5 – 5.5V
Function
0: Device is busy programming, 1: Device is
ready for new command
Output Enable (Active low)
Write Pulse (Active low)
Byte Select 1 (“0” selects Low byte, “1” selects
High byte)
XTAL Action Bit 0
XTAL Action Bit 1
Program memory and EEPROM Data Page
Load
Byte Select 2 (“0” selects Low byte, “1” selects
2’nd High byte)
Bi-directional Data bus (Output when OE is low)
Value
0
0
0
0
8008H–AVR–04/11