ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 142

• Manufacturer Part Number: ATtiny43U
• Manufacturer: Atmel Corporation

Specifications of ATtiny43U

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• 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: 0.7 to 5.5
• Operating Voltage (vcc): 0.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

19.3.1
19.3.2
19.4
19.5
19.5.1
142
Page Size
Parallel Programming Parameters, Pin Mapping, and Commands
ATtiny43U
Signature Bytes
Calibration Byte
Signal Names
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and High-voltage Programming mode, also when the device is
locked.
Signature bytes can also be read by the device firmware. See section
Lock Bits from Software” on page
The three signature bytes reside in a separate address space called the device signature imprint
table. The signature data for ATtiny43U is given in
Table 19-7.
The device signature imprint table of ATtiny43U contains one byte of calibration data for the
internal oscillator, as shown in
written into the OSCCAL register to ensure correct frequency of the calibrated oscillator.
Calibration bytes can also be read by the device firmware. See section
Lock Bits from Software” on page
Table 19-8.
Table 19-9.
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock bits, and Fuse bits in the ATtiny43U. Pulses are assumed to be at
least 250 ns unless otherwise noted.
In this section, some pins of the ATtiny43U are referenced by signal names describing their
functionality during parallel programming, see
in the following table are referenced by pin names.
Part
ATtiny43U
Device
ATtiny43U
Device
ATtiny43U
2K words
(4K bytes)
EEPROM Size
Device Signature Byte
No. of Words in a Page and No. of Pages in the Flash
No. of Words in a Page and No. of Pages in the EEPROM
Flash Size
64 bytes
Signature Byte 0
Page Size
Page Size
Table 19-6 on page
32 words
4 bytes
0x1E
135.
135.
PCWORD
PCWORD
EEA[1:0]
PC[4:0]
Figure 19-1
Table
Signature Byte 1
141. During reset, this byte is automatically
19-7.
No. of Pages
No. of Pages
0x92
and
64
16
Table
19-10. Pins not described
“Reading the Fuse and
“Reading the Fuse and
PCPAGE
PCPAGE
EEA[5:2]
PC[10:5]
Signature Byte 0
0x0C
8048B–AVR–03/09
EEAMSB
PCMSB
10
5