ATtiny2313 Atmel Corporation, ATtiny2313 Datasheet - Page 35

• Manufacturer Part Number: ATtiny2313
• Manufacturer: Atmel Corporation

Specifications of ATtiny2313

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 18
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• 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: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

External Reset
Brown-out Detection
2543L–AVR–08/10
Figure 16. MCU Start-up, RESET Extended Externally
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the
Reset Threshold Voltage – V
the Time-out period – t
Figure 17. External Reset During Operation
ATtiny2313 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
ing operation by comparing it to a fixed trigger level. The trigger level for the BOD can be
selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free
Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
Table 16. BODLEVEL Fuse Coding
BOT
INTERNAL
TIME-OUT
+ V
BODLEVEL 2..0 Fuses
RESET
RESET
HYST
V
CC
CC
/2 and V
101
100
111
110
BOT-
TOUT
= V
– has expired.
V
Table
POT
BOT
RST
- V
– on its positive edge, the delay counter starts the MCU after
15) will generate a reset, even if the clock is not running.
HYST
(1)
Min V
/2.
BOT
V
RST
t
Typ V
TOUT
1.8
2.7
4.3
BOD Disabled
BOT
Max V
BOT
Units
V
CC
level dur-
BOT+
35
=