ATtiny2313 Atmel Corporation, ATtiny2313 Datasheet - Page 34

• 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

Power-on Reset
34
ATtiny2313
Table 15. Reset Characteristics
Notes:
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
POR circuit can be used to trigger the start-up Reset, as well as to detect a failure in supply
voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 15. MCU Start-up, RESET Tied to V
Symbol
V
V
t
RST
POT
RST
INTERNAL
TIME-OUT
CC
RESET
1. Values are guidelines only. Actual values are TBD.
2. The Power-on Reset will not work unless the supply voltage has been below V
RESET
V
decreases below the detection level.
CC
Power-on Reset
Threshold Voltage
(rising)
Power-on Reset
Threshold Voltage
(falling)
Voltage
Minimum pulse width
on RESET Pin
RESET Pin Threshold
Table
Parameter
(2)
15. The POR is activated whenever V
V
V
POT
RST
CC
t
TOUT
rise. The RESET signal is activated again, without any delay,
T
T
A
V
V
A
= -40 - to +85°C
CC
CC
= -40 to +85°C
Condition
= 1.8 - 5.5V
= 1.8 - 5.5V
CC
0.2 V
Min
CC
is below the detection level. The
(1)
CC
Typ
1.2
1.1
(1)
0.9 V
Max
2.5
POT
(1)
CC
2543L–AVR–08/10
(falling)
Units
µs
V
V
V