ATTIny2313-16MI ATMEL Corporation, ATTIny2313-16MI Datasheet - Page 35

• Manufacturer Part Number: ATTIny2313-16MI
• Description: 8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

External Reset
Brown-out Detection
2543C–AVR–12/03
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 Table 15) will generate a reset, even if the clock is
not running. Shorter pulses are not guaranteed to generate a reset. When the applied
signal reaches the Reset Threshold Voltage – V
counter starts the MCU after 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
level during 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
Table 16. BODLEVEL Fuse Coding
INTERNAL
TIME-OUT
RESET
RESET
BODLEVEL 2..0 Fuses
V
CC
CC
111
110
101
100
BOT+
= V
V
BOT
POT
+ V
HYST
/2 and V
(1)
Min V
BOT
V
RST
BOT-
t
TOUT
= V
RST
Typ V
TOUT
BOT
1.8
2.7
4.3
BOD Disabled
– on its positive edge, the delay
- V
BOT
– has expired.
HYST
ATtiny2313/V
/2.
Max V
BOT
Units
V
35
CC