ATTINY2313-20SI Atmel, ATTINY2313-20SI Datasheet - Page 35

• Manufacturer Part Number: ATTINY2313-20SI
• Description: IC MCU AVR 2K FLASH 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY2313-20SI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: ATTINY2313-24SI; ATTINY2313-24SI

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
=